Bt Cotton Hybrids Evaluation Report – South Zone

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Evaluation of Bt Cotton Hybrids

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Report submitted to Indian Council of Agricultural Research

New Delhi

Submitted by

Project Coordinator (Cotton Improvement) All India Coordinated Cotton Improvement Project

Central Institute for Cotton Research Regional Station, Coimbatore 641003

May, 2008

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PARTICULARS Page No.

Executive Summary 3

Summary Tables 5

Bt cotton hybrids evaluation report (South Zone 2007-08) 12

First Year Trial (Intra-hirsutum hybrids) – Set ‘A’ 15

First Year Trial (Intra-hirsutum hybrids) – Set ‘B’ 41

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Combined report of intra-hirsutum hybrids (2006-07 & 2007-08) 78

Evaluation of interspecific (G. hirsutum x G. barbadense) hybrids

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Combined report of inter specific hybrids (2006-07 & 2007-08) 108 �

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The All India Coordinated Cotton Improvement Project of the Indian Council of Agricultural Research was assigned the task of evaluating the performance of Bt cotton hybrids in South Zone during 2007-08.

In the first year intra-hirsutum hybrid trial, two sets of trials viz., Trial Set ‘A’ consisting of 23 Bt test hybrids and three check hybrids (one Bt check hybrid (RCH 2 Bt), non Bt check hybrid (Bunny) and local non Bt check hybrid) and another Trial Set ‘B’ consisting of 23 Bt test hybrids and same set of check hybrids were conducted.

Both the sets of trials were carried out at 11 locations of South Zone with six under irrigated conditions and five under rainfed situations. The irrigated locations were: Warangal (Andhra Pradesh), Raichur, Siruguppa and Beemarayangudi (Karnataka) and Coimbatore and Srivilliputhur (Tamil Nadu) and the rainfed locations were Lam (Guntur), Nandyal, Adilabad (Andhra Pradesh), Dharwad (Karnataka) and Aruppukottai (Tamil Nadu).

Intra Hirsutum Bt Cotton Evaluation Trial (First Year)

The performance of Bt cotton hybrids that were evaluated during the first year (2007-08) under Trial Set ‘A’ and Trial Set ‘B’ are summarized below;

Trial Set ‘A’

Under irrigated conditions, twelve test Bt hybrids registered higher seed cotton yield compared to Bt check hybrid RCH 2 Bt (2157 kg/ha) with enhanced seed cotton yield ranging from 3 to 17 %. Under rainfed situations, barring KCH 707 BG II, VBCH 1505 BG II, VBCH 1506 BG II and SBCH 292, 19 test Bt hybrids established yield superiority over RCH 2 Bt check hybrid with the increase being 4 to 26 %. However, five test hybrids were seen yielding higher as against local check hybrid under rainfed condition. The details are annexed in Summary Table for irrigated and rainfed situations.

Trial Set ‘B’

In this trial, 23 Bt cotton hybrids were evaluated with three check hybrids. As compared to Bt check hybrid, 19 test hybrids registered higher seed cotton yield with the increase being to the tune of 5 to 32 % under irrigated conditions. Eighteen test Bt hybrids exhibited higher seed cotton yield compared to Bt check hybrid with the increase being 1 to 24 % under rainfed situations. Here again, like seen in trial set-A, six test hybrids

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exhibited higher seed cotton yield compared to local check hybrid under rainfed condition. The details are furnished in attached Summary Table. Most of the test hybrids possessed fibre strength of 20 to 22 g/tex with the strength to length ratio being around 0.7 to 0.8.

All the Bt test hybrids evaluated in Trial Set ‘A’ and Trial Set ‘B’ revealed more or less equal reaction to sucking pests like jassids, thrips and aphids as that of check hybrids. Similarly, the noticeable locule damage was observed among all the test and check hybrids, both under rainfed and irrigated situations.

Two Year Evaluation of Intra Hirsutum Bt Cotton Hybrids (2006-07 & 2007 - 08)

In continuation to previous year (2006-07) trial evaluation of intra-hirsutum Bt cotton hybrids, second year evaluation of hybrids (submitted for AICCIP evaluation) was carried out. The hybrids submitted were evaluated as per standard procedures adopted for evaluation of test hybrids in earlier years like inclusion of Bt, non Bt and local check hybrids, ETL based plant protection, entomological and pathological observations.

As compared to RCH 2 Bt check hybrid (2244 kg/ha), six test Bt hybrids like Brahma BG II, Ankur Jai Bt, BCHH 322-2 BG II, Tulasi 9 BG II, Akka BG II, KDCHH 441 BG II registered higher seed cotton yield under irrigated conditions with the yield increase being of the order of 4 to 12 %. Under rainfed conditions, except NCEH 13 Bt (FG), all test hybrids recorded higher mean seed cotton yield with the increase being 0.4 to 16.7 % over Bt check hybrid RCH 2 Bt.

Inter Specific H X B Bt Cotton Evaluation Trial (First Year)

Nine interspecific Bt cotton hybrids were evaluated under irrigated situations in four locations with MRC 6918 as Bt check hybrid and DCH 32 as non Bt check hybrid. Of the nine hybrids evaluated, seven were found superior to the Bt check hybrid in terms of seed cotton yield with the superiority being 2 to 31 %. The fibre quality attributes were seen to be more or less equivalent to that of Bt check hybrid.

Two Years Evaluation of Inter Specific Bt Cotton Hybrids (2006-07 & 2007 - 08)

Five interspecific hybrids (G. hirsutum x G. barbadense) were evaluated for two consecutive years in South Zone. As compared to Bt check hybrid, test hybrids viz., MRC 7918 BG II, MRC 7929 BG II, NCHB 945 Bt, NCHB 940 Bt registered higher seed cotton yield ranging from 2018 to 2493 kg/ha as against 1843 kg/ha by check Bt hybrid MRC 6918 Bt. There was not much variation in fibre quality attributes among test and check hybrids but NCHB 945 Bt and NCHB 940 Bt being found marginally inferior in fibre length; all the test hybrids had S / L ratio around 0.7. All the test hybrids exhibited more or less similar insect pest reaction like that of Bt check hybrid.

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SUMMARY TABLE – TRIAL SET ‘A’ UNDER ETL BASED PROTECTION IN IRRIGATED CONDITION

Entry

Mean Seed

Cotton Yield

(kg/ha) - Irrigated

% Inc. over RCH

2 Bt

Mean Lint

Yield (kg/ha) - Irrigated

Mean boll

weight (g)

Mean Ginning Out Turn

(%)

2.5% span

length (mm)

Micronaire value

Strength (g/tex)

BS /SL Ratio

Jassid/ plant

Whitefly/ plant

Thrips/ plant

Aphid/ plant

Damage in green bolls (%)

Larvae / 20 green

bolls

% square damage

by Bollwor

ms

Open boll

damage (%)

Locule damage

(%)

340 – 2 Bt 2521 17 918 5.3 33.1 32.5 4.3 22.2 0.68 5.5 2.4 9.3 6.0 0.0 0.0 0.6 6.5 5.3JK-Indra Bt 2420 12 951 6.2 34.8 31.7 4.4 22.9 0.72 3.7 2.9 6.6 5.3 1.7 0.7 0.6 4.9 5.6NSPL-405 BG II 2417 12 967 5.6 34.5 32.0 4.2 21.9 0.68 5.3 2.6 6.9 11.3 0.0 0.0 0.2 4.5 6.2NCS 854 Bt2 2355 9 921 5.7 34.7 32.2 4.4 22.0 0.68 4.4 1.6 8.1 5.0 0.0 0.0 0.1 6.6 6.7ANKUR-5642 BGII 2351 9 847 4.8 32.3 33.4 4.2 23.3 0.70 3.9 2.6 5.8 8.5 0.4 0.2 0.1 4.9 5.6Tulasi 7 BGII 2301 7 872 5.4 34.3 31.8 4.5 21.8 0.69 4.8 2.3 7.3 10.4 0.3 0.0 0.3 5.6 7.4ACH 177-2 2273 5 869 5.5 34.3 30.4 4.3 21.4 0.70 4.2 2.3 5.0 8.7 0.0 0.0 0.7 4.7 5.7VICH 5 Bt 2271 5 866 6.4 33.9 31.5 4.3 21.9 0.69 5.6 2.9 7.8 9.5 0.0 0.0 0.1 4.5 6.1ABCH-1065 2266 5 915 4.9 36.2 29.5 4.1 22.2 0.75 5.1 2.9 6.4 5.8 0.0 0.0 0.0 5.6 6.4VBCH-1505 BG II 2257 5 996 5.6 38.3 28.1 4.8 20.9 0.74 6.2 1.4 7.3 5.9 0.0 0.0 0.0 3.1 6.3UPLHH-5 Bt 2248 4 860 4.6 33.7 28.4 3.8 21.8 0.77 3.9 2.2 9.6 8.1 0.0 0.0 0.5 5.1 5.7PCH 2270 Bt 2 2227 3 885 5.5 35.3 31.8 4.3 22.2 0.70 4.5 2.4 8.8 7.8 1.0 0.3 0.4 5.4 4.3GK-217 BG II 2161 0 831 5.5 34.0 31.8 4.4 21.7 0.68 4.8 2.3 6.0 8.5 0.0 0.0 0.0 6.7 5.6RCH 2 Bt (Bt check) 2157 0 873 5.3 36.1 31.2 4.6 21.8 0.70 5.6 2.8 4.4 6.2 0.0 0.0 0.3 3.3 3.6NAMCOT-612 BG II 2118 -2 857 5.5 35.6 29.5 4.2 21.0 0.71 4.6 3.2 6.5 6.0 0.0 0.0 0.0 5.9 6.5NCEH-34 2112 -2 830 5.7 35.5 32.0 4.3 21.4 0.67 3.8 2.2 9.4 6.7 0.0 0.0 0.1 5.0 5.9Monsoon Bt 2111 -2 846 5.6 35.9 33.3 4.3 23.1 0.69 5.4 2.6 6.2 6.3 0.0 0.0 0.9 2.8 7.2VCH-603 BG II 2108 -2 904 5.7 38.1 28.5 4.3 19.8 0.69 4.8 2.3 5.1 6.6 0.0 0.0 0.0 4.5 6.0PRCH 505 BG II 2091 -3 798 5.9 34.3 33.5 4.2 22.2 0.66 5.4 2.2 5.6 9.0 0.0 0.0 0.1 6.3 6.9SBCH 292 2084 -3 876 4.8 37.0 26.2 4.5 20.9 0.80 5.1 2.9 9.8 8.6 0.0 0.0 0.1 6.2 4.0SP 504 B2 (Dhanno) 2056 -5 861 5.8 37.5 31.6 4.3 21.5 0.68 4.9 1.9 5.7 6.0 0.0 0.0 0.1 3.1 6.0ZCH-50072 2003 -7 794 5.7 35.0 30.9 4.3 21.0 0.68 3.7 1.6 6.9 6.6 2.5 0.8 0.0 6.4 5.9KCH-707 BG II 1780 -17 722 5.4 35.4 30.6 4.4 21.5 0.70 4.7 1.7 10.0 9.3 0.9 0.2 0.0 5.2 7.2LC (Hybrid Check) 1778 -18 718 5.1 38.0 29.3 4.6 21.9 0.75 7.1 2.6 8.0 9.0 0.0 0.0 6.3 4.5 10.3Bunny (Non-Bt check) 1707 -21 625 5.3 33.3 33.3 4.3 23.5 0.71 4.8 1.6 6.3 6.6 0.8 0.3 3.5 8.9 7.1VBCH-1506 BGII 1428 -34 577 5.9 35.0 31.7 4.3 21.7 0.68 6.4 2.3 8.8 9.7 0.0 0.0 1.0 4.8 3.5

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SUMMARY TABLE – TRIAL SET ‘A’ UNDER ETL BASED PROTECTION IN RAINFED CONDITION

Entry

Mean Seed Cotton Yield

(kg/ha) - Irrigated

% Inc. over RCH

2 Bt

Mean Lint Yield

(kg/ha) - Irrigated

Mean boll

weight (g)


(%)

2.5% span

length (mm)

Micronaire value

Strength (g/tex)

BS / SL Ratio

Jassid/ plant

Whitefly/ plant

Thrips/ plant

Aphid/ plant


Larvae / 20 green

bolls

% square damage

by Bollwor

ms

Open boll

damage (%)

Locule damage

(%)

GK-217 BG II 2359 26 811 4.9 34.5 30.6 4.5 21.7 0.71 1.5 0.9 9.0 4.3 0.0 0.0 3.6 0.0 5.0340 – 2 Bt 2326 25 796 4.8 34.3 31.6 4.0 23.1 0.73 2.0 1.3 4.1 2.2 0.0 0.0 2.5 0.0 2.9Tulasi 7 BGII 2285 23 776 4.6 33.9 29.8 4.4 23.0 0.77 2.7 0.6 5.6 5.1 0.0 0.0 2.7 0.0 2.9ACH 177-2 2248 21 789 4.4 35.1 28.2 4.2 21.9 0.78 2.0 1.0 4.7 1.8 0.0 0.0 0.4 0.0 6.3VICH 5 Bt 2230 20 773 5.7 34.6 29.5 4.3 22.1 0.75 3.4 0.7 7.6 4.0 0.0 0.0 3.0 0.0 8.0LC (Hybrid Check) 2157 16 752 4.5 34.7 29.9 4.4 21.5 0.72 2.8 0.5 4.3 2.0 0.0 0.0 1.6 0.0 8.7JK-Indra Bt 2134 14 735 5.2 34.5 30.7 4.1 22.7 0.74 2.2 0.1 2.5 1.5 0.0 0.0 2.4 0.0 5.5ABCH-1065 2129 14 759 4.8 35.3 27.3 3.9 22.9 0.84 2.6 0.6 7.5 1.8 0.0 0.0 3.0 0.0 5.4PCH 2270 Bt 2 2104 13 722 4.5 34.2 30.2 4.3 21.7 0.72 2.0 0.4 4.3 2.7 0.0 0.0 1.1 0.0 7.0NSPL-405 BG II 2083 12 727 4.6 34.9 30.6 4.1 22.6 0.74 2.7 0.7 5.2 1.7 0.0 0.0 2.0 0.0 7.7ANKUR-5642 BGII 2060 10 695 4.6 33.5 31.9 4.0 23.0 0.72 2.3 1.1 5.8 1.8 0.0 0.0 2.7 0.0 4.0NCS 854 Bt2 2058 10 706 5.1 34.4 29.3 3.9 22.7 0.77 2.7 1.5 6.0 3.5 0.0 0.0 4.0 0.0 6.7PRCH 505 BG II 2054 10 727 5.0 35.3 30.7 4.3 22.5 0.73 2.5 0.9 6.0 3.8 0.0 0.0 1.6 0.0 3.6SP 504 B2 (Dhanno) 2040 9 726 5.1 35.6 30.6 4.2 22.2 0.72 2.3 0.6 3.1 3.0 0.0 0.0 1.7 0.0 5.5Monsoon Bt 2034 9 707 4.9 34.6 30.5 4.3 22.7 0.75 2.7 1.2 7.8 2.1 0.0 0.0 4.1 0.0 10.4ZCH-50072 2027 9 739 4.8 36.5 29.2 4.3 21.6 0.74 2.4 1.4 6.0 1.9 0.0 0.0 1.5 0.0 2.8NAMCOT-612 BG II 1967 5 697 4.6 35.3 28.0 4.0 21.0 0.75 2.7 0.6 6.1 1.4 0.0 0.0 1.3 0.0 5.7NCEH-34 1959 5 691 4.6 35.3 30.9 3.9 22.7 0.73 2.7 0.2 5.4 1.7 0.0 0.0 2.1 0.0 9.3UPLHH-5 Bt 1943 4 666 4.2 33.9 27.5 4.1 23.3 0.85 2.4 0.5 6.3 2.3 0.0 0.0 3.0 0.0 5.8VCH-603 BG II 1932 4 685 4.9 36.3 27.9 4.2 22.0 0.79 3.4 0.7 5.0 1.5 0.0 0.0 5.9 0.0 2.8SBCH 292 1866 0 671 4.3 35.4 26.1 4.4 21.8 0.83 3.3 0.5 5.2 1.0 0.0 0.0 2.1 0.0 8.2RCH 2 Bt (Bt check) 1865 0 642 4.4 34.3 29.8 4.2 20.9 0.70 3.2 0.7 5.1 1.0 0.0 0.0 2.3 0.0 5.6Bunny (Non-Bt check) 1822 -2 621 4.4 34.2 32.0 4.2 22.3 0.70 2.3 0.3 3.4 3.1 0.0 0.0 0.9 0.0 9.3KCH-707 BG II 1772 -5 654 4.7 34.2 29.2 4.4 21.5 0.74 2.2 0.6 4.9 4.8 0.0 0.0 4.2 0.0 5.4VBCH-1505 BG II 1749 -6 631 4.8 35.3 26.0 3.9 22.4 0.86 2.6 1.4 5.7 1.1 0.0 0.0 4.6 0.0 7.7VBCH-1506 BGII 1487 -20 519 4.7 34.2 28.5 3.9 22.2 0.78 5.6 0.7 3.7 2.1 0.0 0.0 2.8 0.0 2.8

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SUMMARY TABLE – TRIAL SET ‘B’ UNDER ETL BASED PROTECTION IN IRRIGATED CONDITION

Entry

Mean Seed

Cotton Yield

(kg/ha) - Irrigated

% Inc. over RCH

2 Bt

Mean Lint

Yield (kg/ha) - Irrigated

Mean boll

weight (g)


(%)

2.5% span

length (mm)

Micronaire value

Strength (g/tex)

BS / SL Ratio

Jassid/ plant

Whitefly/ plant

Thrips/ plant

Aphid/plant


Larvae / 20 green

bolls

% square damage

by Bollwor

ms

Open boll

damage (%)

Locule damage

(%)

ACH 155-2 2752 32 1075 5.2 36.3 29.0 4.2 21.6 0.74 3.2 2.5 8.8 8.0 0.0 0.0 0.0 1.6 3.6VICH 15 Bt 2654 28 1121 5.3 38.4 29.5 4.3 21.1 0.71 4.2 1.5 7.9 7.5 0.0 0.0 0.1 0.5 4.0JKCH-2245 Bt 2638 27 1004 5.1 36.0 31.5 4.1 21.4 0.68 4.0 1.2 6.7 7.0 0.0 0.0 1.1 1.1 6.3NCS 207 Bt 2 2611 26 1029 6.2 35.2 31.8 4.3 21.9 0.69 4.4 2.0 7.0 7.1 0.0 0.0 0.2 2.2 5.9KDCHH 9632 BG II 2590 25 925 5.6 33.5 28.8 4.1 21.4 0.74 2.8 1.9 7.1 6.6 0.0 0.0 1.1 2.5 5.1NSPL -999 BG II 2579 24 1030 5.8 35.6 31.8 4.5 22.3 0.70 3.6 1.2 8.7 5.4 0.0 0.0 0.2 1.5 8.7PCH 105 Bt 2 2529 22 987 5.6 36.3 31.1 4.4 22.8 0.73 5.3 1.6 9.0 7.2 0.0 0.0 0.2 2.8 7.0Tulasi 118 BGII 2518 21 1008 5.6 36.6 31.3 4.3 22.1 0.70 6.3 1.7 7.7 9.1 0.8 0.3 0.2 2.8 6.6PRCH 504 BG II 2508 21 973 5.6 34.9 32.2 4.3 22.3 0.69 3.5 1.1 7.5 13.3 0.6 0.0 0.2 1.4 5.1NAMCOT-607 BG II 2445 18 988 4.6 36.9 29.7 4.5 19.9 0.67 5.2 1.9 6.1 9.3 0.0 0.0 0.7 1.0 5.4KCH-135 Bt II 2370 14 943 5.2 36.8 32.3 4.1 21.4 0.66 3.5 1.5 6.4 9.4 0.2 0.0 0.3 1.7 5.5ANKUR-10122 BGII 2353 13 863 5.2 34.6 32.7 4.0 23.0 0.70 3.3 1.5 8.7 8.4 0.0 0.0 0.5 1.5 5.4113 – 2 Bt 2337 12 933 5.5 36.5 31.3 4.4 22.5 0.72 5.9 1.9 4.8 6.5 0.0 0.0 0.4 0.8 4.5SP 1037 B2 2297 11 888 5.5 36.0 30.6 4.3 21.6 0.71 6.3 1.2 5.1 5.9 0.3 0.0 0.9 2.1 5.6RCH- 596 BGII 2272 9 843 5.5 34.5 32.5 4.1 22.5 0.69 3.8 1.6 8.3 7.4 0.0 0.0 0.3 1.1 5.3VCH-602 BG II 2218 7 924 5.7 38.0 32.0 4.0 21.0 0.66 5.7 1.7 6.0 10.5 0.0 0.0 0.6 1.7 5.8UPLHH-12 Bt 2217 7 837 5.8 35.3 29.6 4.1 20.9 0.71 5.1 1.9 7.7 10.2 1.3 0.5 0.3 2.9 8.3ABCH-1020 2177 5 772 5.4 32.8 31.9 3.9 22.0 0.69 4.7 1.8 6.5 6.9 0.0 0.0 0.3 2.1 5.3MLCH- 318 BGII 2176 5 845 4.8 35.6 29.4 4.3 21.8 0.74 3.1 1.6 6.0 7.4 0.0 0.0 0.9 1.4 6.3RCH 2 Bt (Bt check) 2078 0 780 4.7 34.6 31.3 4.3 21.8 0.70 4.6 1.9 8.8 8.1 0.0 0.0 0.5 1.4 5.4NCEH- 29 1896 -9 691 5.3 32.9 32.3 3.9 22.4 0.69 4.7 2.1 9.5 6.4 0.0 0.0 0.5 1.4 6.1GBCH 04 1864 -10 751 5.6 36.6 30.0 4.1 21.1 0.70 6.3 1.2 9.1 9.7 0.0 0.0 6.5 2.8 3.6SBCH 284 1837 -12 773 5.5 37.2 28.4 4.2 20.6 0.72 7.5 1.5 6.1 6.4 0.0 0.0 7.9 2.7 8.2Bunny (Non-Bt check) 1774 -15 662 5.3 36.2 32.4 4.2 22.7 0.70 4.6 2.4 5.8 5.9 0.0 0.0 14.2 1.2 9.7LC (Hybrid Check) 1685 -19 654 5.1 38.2 28.9 4.6 20.9 0.72 5.8 1.7 8.5 10.6 0.0 0.0 9.4 1.8 5.2GK-205 BG II 1516 -27 618 4.7 36.8 29.5 4.1 21.0 0.71 4.1 2.0 8.5 11.8 0.5 0.0 0.1 0.3 4.7

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SUMMARY TABLE – TRIAL SET ‘B’ UNDER ETL BASED PROTECTION IN RAINFED CONDITION

Entry

Mean Seed

Cotton Yield

(kg/ha)

% Inc. over RCH

2 Bt

Mean Lint Yield

(kg/ha)

Mean boll

weight (g)


(%)

2.5% span

length (mm)

Micronaire value

Strength (g/tex)

BS / SL Ratio

Jassid/ plant

Whitefly/ plant

Thrips/ plant

Aphid/plant


Larvae / 20 green

bolls

% square damage

by Bollwor

ms

Locule damage

(%)

KDCHH 9632 BG II 2311 24 800 4.9 34.5 27.6 4.4 21.6 0.78 2.4 0.9 4.6 1.0 0.0 0.0 1.2 7.9NCS 207 Bt 2 2307 24 816 4.7 35.2 30.7 3.8 22.8 0.74 1.4 0.1 7.2 0.9 0.0 0.0 2.1 8.4ACH 155-2 2304 24 834 4.6 36.1 26.5 4.3 22.3 0.84 2.3 0.0 4.2 1.7 0.0 0.0 3.7 9.3VICH 15 Bt 2284 23 858 4.5 37.7 28.2 4.2 22.2 0.79 3.0 0.1 5.0 1.7 0.0 0.0 3.8 8.4NSPL -999 BG II 2268 22 814 5.0 36.0 29.8 4.4 22.3 0.75 2.0 0.3 5.3 1.8 0.0 0.0 2.6 4.3PCH 105 Bt 2 2207 18 824 4.9 37.5 29.6 4.3 23.1 0.78 2.7 0.5 6.1 1.5 0.0 0.0 4.0 6.6LC (Hybrid Check) 2133 14 793 4.3 37.1 28.4 4.3 23.1 0.81 2.2 0.3 6.0 1.7 0.0 0.0 3.5 9.4SP 1037 B2 2132 14 773 4.5 35.9 29.5 4.5 22.1 0.75 3.4 0.4 5.1 0.4 0.0 0.0 1.5 5.7ABCH-1020 2101 13 688 4.7 32.8 31.3 3.7 23.1 0.74 2.4 0.2 4.3 2.0 0.0 0.0 3.9 11.3KCH-135 Bt II 2088 12 726 4.6 34.9 30.5 3.9 21.7 0.71 2.6 0.2 4.7 2.5 0.0 0.0 2.2 5.5MLCH- 318 BGII 2085 12 736 4.2 35.3 28.2 4.4 23.0 0.82 0.9 0.2 3.9 1.1 0.0 0.0 3.2 9.9JKCH-2245 Bt 2061 11 720 4.3 35.0 30.8 4.0 21.7 0.71 2.5 0.8 4.4 1.5 0.0 0.0 3.9 5.6Tulasi 118 BGII 2060 10 761 4.9 37.2 30.4 4.1 21.9 0.72 1.8 0.4 4.7 1.5 0.0 0.0 1.7 7.9PRCH 504 BG II 2024 9 730 5.0 35.5 31.5 3.9 22.9 0.73 2.5 1.0 4.4 1.7 0.0 0.0 3.4 3.3NAMCOT-607 BG II 2012 8 710 4.0 35.0 27.9 4.3 20.5 0.74 2.9 0.6 5.2 1.3 0.0 0.0 2.8 8.6113 – 2 Bt 2011 8 719 4.6 35.9 29.2 4.3 22.5 0.77 1.4 0.3 4.0 2.3 0.0 0.0 2.2 8.5UPLHH-12 Bt 1962 5 699 5.4 35.5 28.4 4.1 22.0 0.78 2.7 0.4 4.7 1.1 0.0 0.0 2.4 5.2ANKUR-10122 BGII 1924 3 644 4.6 33.4 30.3 3.9 22.9 0.75 2.4 0.5 4.9 1.9 0.0 0.0 5.0 7.1NCEH- 29 1880 1 638 4.8 33.9 32.8 4.4 21.5 0.66 1.6 0.1 5.3 1.5 0.0 0.0 3.8 10.8RCH 2 Bt (Bt check) 1864 0 639 4.4 34.2 29.7 4.3 21.5 0.72 3.1 0.5 3.0 1.2 0.0 0.0 4.0 8.8RCH- 596 BGII 1851 -1 644 4.4 34.7 30.5 4.2 22.2 0.73 1.8 0.1 3.1 1.1 0.0 0.0 5.3 12.3VCH-602 BG II 1802 -3 659 4.8 36.8 29.9 4.1 21.4 0.72 1.8 0.3 5.9 1.6 0.0 0.0 1.8 8.1Bunny (Non-Bt check) 1721 -8 626 4.5 35.9 32.4 3.9 23.2 0.71 1.9 0.1 6.8 1.2 0.0 0.0 3.0 4.8SBCH 284 1613 -13 555 4.8 34.2 26.7 3.8 22.0 0.82 2.8 0.5 3.9 1.9 0.0 0.0 0.9 4.1GK-205 BG II 1573 -16 571 4.4 36.4 28.0 4.3 21.3 0.76 2.3 0.6 5.1 0.9 0.0 0.0 2.5 5.8GBCH 04 1455 -22 538 4.4 37.4 28.9 4.0 21.9 0.76 2.7 0.2 3.2 1.3 0.0 0.0 3.0 8.7

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9

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SUMMARY TABLE FOR COMBINED REPORT OF INTRA HIRSUTUM HYBRIDS UNDER IRRIGATED CONDITION (2006-07 & 2007-08)

Entry

Seed cotton yield

(kg/ha)

% Inc. over RCH 2 Bt

lint yield

(kg/ha)

Mean boll

weight (g)

Mean GOT (%)

2.5% span

length (mm)

Micronaire value

Strength (g/tex)

BS/SL Ratio

Damage in green

bolls (%)

Larvae / 20

green bolls

% square damage

by Bollworms

Open boll

damage (%)

Locule damage

(%)

Brahma BG II 2524 12 903 5.9 36.4 32.1 4.4 22.3 0.70 2.1 0.4 0.7 4.7 5.9

Ankur Jai Bt 2484 11 856 5.6 35.4 33.1 4.7 22.0 0.66 3.4 0.2 1.5 4.3 6.8

BCHH 322-2 BG II 2432 8 866 5.4 36.4 32.7 4.5 22.0 0.67 2.6 0.5 0.8 5.0 4.0

Tulasi 9 BG II 2395 7 893 5.6 36.8 31.6 4.8 21.6 0.68 3.5 0.4 1.3 5.2 6.7

Akka BG II 2378 6 851 5.1 35.3 33.7 4.4 23.3 0.69 3.5 0.4 0.8 4.7 5.4

KDCHH 441 BG II 2340 4 847 5.0 35.7 29.4 4.4 20.8 0.71 3.2 0.4 0.5 4.5 6.8

RCH 2 Bt (Bt check) 2244 0 844 4.7 35.9 31.8 4.7 21.6 0.68 2.1 0.3 0.5 4.1 6.3

NCEH 13 Bt (FG) 2016 -10 732 4.9 36.0 31.3 4.3 22.9 0.73 2.4 0.4 0.7 4.6 7.4

JK Gowri Bt (ET 1) 1894 -16 618 4.9 35.1 30.4 4.9 21.2 0.70 5.7 0.6 8.0 8.7 9.9

Bunny (Non-Bt check) 1883 -16 613 5.1 35.5 32.8 4.5 22.8 0.70 5.6 0.8 11.3 8.3 8.6

LC (Hybrid Check) 1823 -19 614 4.8 37.4 31.0 4.8 22.3 0.72 5.8 0.8 11.8 9.1 8.6

9

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SUMMARY TABLE FOR COMBINED REPORT OF INTRA HIRSUTUM HYBRIDS UNDER RAINFED CONDITION (2006-07 & 2007-08)

Entry

Seed cotton yield

(kg/ha)

% Inc. over

RCH 2 Bt

lint yield

(kg/ha)

Mean boll

weight (g)

Mean GOT (%)

2.5% span

length (mm)

Micronaire value

Strength (g/tex)

BS/SL Ratio


Larvae / 20 green

bolls

% square damage

by Bollworm

s

Open boll damage

(%)

Locule damage

(%)

KDCHH 441 BG II 2296 16.7 802 4.6 35.0 28.1 4.5 20.3 0.72 3.7 1.5 4.6 6.3 8.6Tulasi 9 BG II 2212 12.4 810 4.8 36.7 30.5 4.4 21.4 0.70 7.1 0.0 3.2 4.5 8.2Ankur Jai Bt 2179 10.8 755 4.7 34.7 32.3 4.3 22.3 0.69 4.6 0.4 6.4 4.4 8.3Brahma BG II 2136 8.6 761 5.0 35.7 31.5 4.3 22.8 0.72 8.3 0.7 5.5 6.2 12.0Akka BG II 2113 7.4 726 4.6 34.5 32.8 4.4 22.2 0.68 4.2 0.4 5.3 6.0 8.3JK Gowri Bt (ET 1) 2080 5.8 729 4.5 35.1 29.9 4.5 21.5 0.72 20.4 1.8 6.8 12.2 13.2BCHH 322-2 BG II 1975 0.4 694 4.7 35.5 31.4 4.2 22.6 0.72 6.3 0.2 4.0 7.0 10.9RCH 2 Bt (Bt check) 1967 0.0 680 4.2 34.6 29.8 4.3 21.4 0.72 7.1 0.0 4.6 3.6 7.8NCEH 13 Bt (FG) 1966 0.0 683 4.6 35.1 31.2 4.1 22.5 0.72 4.2 0.3 5.1 3.9 7.3Bunny (Non-Bt check) 1854 -5.7 654 4.7 35.8 31.5 4.3 21.3 0.68 15.8 2.5 5.7 13.0 15.8LC (Hybrid Check) 1812 -7.9 634 4.4 35.3 28.2 4.3 20.7 0.73 21.7 1.7 6.0 10.0 13.9

10

11

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SUMMARY TABLE FOR COMBINED REPORT OF INTER SPECIF H XB HYBRIDS UNDER IRRIGATED CONDITION (2006-07 & 2007-08)

Entry

Seed cotton yield

(kg/ha)

% Inc. over MRC

6918 Bt

Mean boll

weight (g)


(%)

2.5% span

length (mm)

Micronaire value

Bundle Strength (g/tex)

BS / SL Ratio


Larvae / 20 green

bolls

% square damage

by Bollwor

ms

Open boll

damage (%)

Locule damage

(%)

MRC 7918 BG II 2493 35 3.9 30.7 36.0 3.2 25.4 0.71 0.4 0.1 0.6 0.1 4.8MRC 7929 BG II 2332 27 4.0 31.1 36.2 3.3 23.7 0.66 0.4 0.1 1.3 0.4 5.5

NCHB 945 Bt 2128 15 3.8 32.6 33.7 3.5 25.2 0.75 0.8 0.2 1.2 0.3 4.7NCHB 940 Bt 2018 9 3.9 33.5 33.6 3.2 25.6 0.76 0.4 0.1 1.3 0.0 5.1MRC 6918 Bt (Bt Check) 1843 0 3.8 32.9 34.3 3.5 26.3 0.77 0.4 0.1 0.9 0.0 4.0JK Chamundi Bt 1799 -2 3.7 31.8 35.5 3.3 25.0 0.70 0.8 0.1 0.5 0.8 7.7

DCH 32 (Non Bt Check) 1491 -19 3.9 33.1 35.9 3.3 24.2 0.67 1.7 0.1 2.1 0.6 6.4

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The task of evaluating Bt cotton hybrids in the South Zone was assigned to the All India Coordinated Cotton Improvement Project (AICCIP) as per letter no. D. O. No. 2 (3) / 2007 – CCI dated 05-06-2007 of ICAR. Since, number of entries sponsored for testing in intra-hirsutum hybrids category was in large numbers for first year evaluation, two sets of trials viz., Trial ‘A’ and Trial ‘B’ were conducted with common Bt and non-Bt and local check hybrids for field evaluation. INTRA-HIRSUTUM HYBRID TRIAL – FIRST YEAR TRIAL Trial Entries – Set ‘A’ Name of the Company Name of the Hybrid Ajeet Seeds Ltd. ACH 177-2 Amar Biotech Ltd. ABCH-1065 Ankur Seeds Pvt. Ltd. ANKUR-5642 BGII Bayer Bioscience Pvt. Limited. SP 504 B2 (Dhanno) Bio Seeds Research India Ltd. 340 – 2 Bt Ganga Kaveri Seeds Ltd. GK-217 BG II J. K. Agri Genetics Ltd. JK-Indra Bt Kaveri Seed Co. Ltd. KCH-707 BG II Namdhari Seeds Pvt.Ltd. NAMCOT-612 BG II Nandi Seeds Pvt. Ltd. NSPL-405 BG II Nath Seeds Ltd. NCEH-34 Nuziveedu Seeds Ltd. NCS 854 Bt2 Prabhat Agri Biotech Limited. PCH 2270 Bt 2 Pravardhan Seeds Pvt. Ltd. PRCH 505 BG II Safal Seeds and Biotech Ltd. SBCH 292 Tulasi Seeds Pvt. Ltd. Tulasi 7 BGII Uniphos Enterprises. UPLHH-5 Bt Vibha Agrotech Ltd. VBCH-1506 BGII Vibha Agrotech Ltd. VBCH-1505 BG II Vikki s̀ Agrotech Pvt.Ltd. VCH-603 BG II Vikram Seeds Limited. VICH 5 Bt Yashoda Hybrids Seeds Ltd. Monsoon Bt Zuari Seeds Ltd ZCH-50072 Bt Check Hybrid RCH 2 Bt (Bt check) Non-Bt Check Hybrid Bunny (Non-Bt check) Local check hybrids LC (Hybrid Check)

13

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Trial Entries – Set ‘B’ Name of the Company Name of the Hybrid Ajeet Seeds Ltd. ACH 155-2 Amar Biotech Ltd. ABCH-1020 Ankur Seeds Pvt. Ltd. ANKUR-10122 BGII Bayer Bioscience Pvt. Limited. SP 1037 B2 Bio Seeds Research India Ltd. 113 – 2 Bt Emergent Genetics India Pvt. Ltd. MLCH- 318 BGII Ganga Kaveri Seeds Ltd. GK-205 BG II Green Gold Seeds Ltd. GBCH 04 J. K. Agri Genetics Ltd. JKCH-2245 Bt Kaveri Seed Co. Ltd. KCH-135 Bt II Krishidhan seeds Ltd. KDCHH 9632 BG II Namdhari Seeds Pvt.Ltd. NAMCOT-607 BG II Nandi Seeds Pvt. Ltd. NSPL -999 BG II Nath Seeds Ltd. NCEH- 29 Nuziveedu Seeds Ltd. NCS 207 Bt 2 Prabhat Agri Biotech Limited. PCH 105 Bt 2 Pravardhan Seeds Pvt. Ltd. PRCH 504 BG II Rasi Seed Co. Ltd. RCH- 596 BGII Safal Seeds and Biotech Ltd. SBCH 284 Tulasi Seeds Pvt.Ltd. Tulasi 118 BGII Uniphos Enterprises. UPLHH-12 Bt Vikki s̀ Agrotech Pvt.Ltd. VCH-602 BG II Vikram Seeds Limited. VICH 15 Bt Bt Check Hybrid RCH 2 Bt (Bt check) Non-Bt Check Hybrid Bunny (Non-Bt check) Local check hybrids LC (Hybrid Check) Trial locations The following were the trial locations: Irrigated (I)

1. Regional Agricultural Research Station, Warangal, Acharya N. G. Ranga Agricultural University, Andhra Pradesh,

2. Agricultural Research Station, Sirugappa, University of Agricultural Sciences, Karnataka,

3. Agricultural Research Station, Raichur, University of Agricultural Sciences, Karnataka,

4. Agricultural Research Station, Beemarayangudi, University of Agricultural Sciences, Karnataka,

5. Cotton Research Station, Tamil Nadu Agricultural University, Coimbatore, and

6. Cotton Research Station, Tamil Nadu Agricultural University, Srivilliputur.

14

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Rainfed (R)

1. Regional Agricultural Research Station, Lam, Guntur, Acharya N. G. Ranga Agricultural University, Andhra Pradesh,

2. Regional Agricultural Research Station, Nandyal, Acharya N. G. Ranga Agricultural University, Andhra Pradesh,

3. Regional Agricultural Research Station, Adilabad, Acharya N. G. Ranga Agricultural University, Andhra Pradesh,

4. Agricultural Research Station, Dharwad, University of Agricultural Sciences, Karnataka,

5. Agricultural Research Station, Tamil Nadu Agricultural University, Aruppukottai. Trial Details

No. of Entries : 24 + 3 checks (Set ‘A’); 23 + checks (Set ‘B’); No. of Rows : Yield Trial: 6 Rows

Screening Trials 2 & 3: 3 Rows

Row Length: : 6m

Spacing: Irrigated : Andhra Pradesh - 90 x 90 cm Karnataka - 90 x 60 cm Tamil Nadu - 90 x 60 cm

Rainfed : Lam - 120 x 60 cm Nandyal - 90 x 60 cm Adilabad - 90 x 90 cm Dharwad - 90 x 60 cm Aruppukottai - 75 x 45 cm

No. of Replications: : Three

Design : Randomized Block Design

Fertilizers : As per recommendations Trials Evaluation under ETL Based Plant Protection

For major sucking pests and boll worms, weekly observations were recorded from 45 DAS and insecticide were sprayed based on the threshold levels of pests. The sprayings were undertaken in all the replications of an entry even if in one of the replications, the threshold level of infestation has exceeded.

15

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Evaluation under Unprotected Conditions for Boll worms Against bollworms, all the test entries including controls were evaluated under unprotected conditions. Pathological Evaluation Reaction to major diseases was observed in all the entries in the trial.

Observations Recorded Various biometrical observations viz., Germination Percentage, Final Plant Stand, Ginning Percentage, Lint Index, Seed Index, Seed Cotton Yield and Lint Yield were recorded in the ETL based plant protection plots. In ETL based plant protection trial, observations on sap sucking pests, boll worm damages and natural enemies were also recorded. The incidence of major diseases like Alternaria leaf spot, bacterial blight and grey mildew were recorded under natural conditions. A. BIOMETRICAL EVALUATION. Biometrical data recorded in the ETL based plant protection trial are furnished below for Trial Set ‘A’ followed by Trial Set ‘B’.

Trial Set ‘A’ Germination and Final Plant Stand The germination as well as plant stand at harvest was good in all the entries under both irrigated and rainfed situations (Table 1). Boll Weight Overall mean boll weight of the Bt hybrids ranged from 4.6 to 6.4 g under irrigated conditions, while under rainfed conditions, it ranged between 4.2 and 5.7 g (Table 2). Among all the hybrids tested the highest boll weight was recorded in VICH 5 Bt under both irrigated (6.4 g) and rainfed conditions (5.7 g). Ginning Outturn (%) The ginning outturn data recorded in ten centres (five irrigated conditions + five rainfed conditions) is given in Table 3. The mean data ranged from 32.3 to 38.3 % in irrigated conditions and from 33.5 to 36.5 % in rainfed conditions.

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Table 1. Germination (%) and Plant Stand in Set ‘A’ under ETL based protection

Entry Germination (%) Plant Stand

Coimbatore B'gudi Coimbatore LAM Mean

(I) Mean (RF)

JK-Indra Bt 97.2 44.3 57.3 58.3 50.8 58.3 Bunny (Non-Bt check) 91.1 45.7 53.0 58.0 49.3 58.0 340 – 2 Bt 95.0 45.3 54.3 58.0 49.8 58.0 VBCH-1506 BGII 87.8 35.7 47.0 57.7 41.3 57.7 ANKUR-5642 BGII 92.2 44.7 54.0 59.7 49.3 59.7 Tulasi 7 BGII 88.9 47.0 52.0 57.3 49.5 57.3 UPLHH-5 Bt 90.0 43.7 51.3 57.7 47.5 57.7 SBCH 292 92.8 48.0 54.3 58.3 51.2 58.3 NSPL-405 BG II 89.4 45.7 52.0 58.7 48.8 58.7 ACH 177-2 92.2 47.0 54.0 58.0 50.5 58.0 NCS 854 Bt2 93.9 44.3 52.7 59.3 48.5 59.3 ZCH-50072 93.3 47.3 54.7 59.0 51.0 59.0 VBCH-1505 BG II 81.1 38.0 47.7 58.7 42.8 58.7 PRCH 505 BG II 85.0 44.7 48.0 58.0 46.3 58.0 VICH 5 Bt 91.7 43.0 53.3 60.0 48.2 60.0 LC (Hybrid Check) 95.0 47.7 55.3 59.0 51.5 59.0 VCH-603 BG II 95.0 42.3 53.3 58.7 47.8 58.7 KCH-707 BG II 80.0 29.3 44.3 58.0 36.8 58.0 SP 504 B2 (Dhanno) 91.1 40.0 51.3 58.7 45.7 58.7 GK-217 BG II 94.4 43.3 53.7 58.0 48.5 58.0 PCH 2270 Bt 2 99.4 45.0 57.0 59.3 51.0 59.3 Monsoon Bt 98.3 44.7 55.7 58.3 50.2 58.3 ABCH-1065 90.6 38.7 52.3 60.0 45.5 60.0 NCEH-34 92.2 44.3 52.7 59.3 48.5 59.3 NAMCOT-612 BG II 82.2 38.7 47.3 59.0 43.0 59.0 RCH 2 Bt (Bt check) 80.6 46.0 46.7 58.7 46.3 58.7

17

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Table 2. Boll weight (g) in Set ‘A’ under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Rai

chur

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Dha

rwad

Aru

ppuk

otta

i

Ove

rall

mea

n

Mea

n (I)

Mea

n (R

F)

JK-Indra Bt 5.8 5.8 6.1 6.9 6.4 5.7 3.9 6.3 6.5 3.5 5.7 6.2 5.2Bunny (Non-Bt check) 5.0 5.2 4.8 6.2 5.4 5.2 3.1 4.3 5.7 3.7 4.8 5.3 4.4340 – 2 Bt 5.0 4.8 4.7 6.3 5.6 5.4 4.1 5.1 5.7 3.6 5.1 5.3 4.8VBCH-1506 BGII 5.0 5.6 6.2 6.3 6.4 5.1 4.1 4.3 6.5 3.6 5.2 5.9 4.7ANKUR-5642 BGII 4.0 4.8 5.2 5.5 4.6 5.5 3.9 4.5 5.8 3.4 4.7 4.8 4.6Tulasi 7 BGII 4.9 4.8 5.6 6.2 5.5 5.0 3.9 5.1 5.4 3.9 5.0 5.4 4.6UPLHH-5 Bt 4.4 4.5 4.4 4.6 5.3 4.2 3.7 4.3 5.1 3.8 4.4 4.6 4.2SBCH 292 4.8 4.8 4.7 5.6 4.3 4.5 3.8 5.2 4.9 3.2 4.5 4.8 4.3NSPL-405 BG II 4.9 5.3 5.4 6.3 6.3 4.3 3.7 5.2 6.1 3.8 5.1 5.6 4.6ACH 177-2 4.4 5.2 5.6 6.2 5.9 5.3 3.9 4.2 5.5 3.4 4.9 5.5 4.4NCS 854 Bt2 5.2 5.7 5.7 6.5 5.6 5.5 4.0 5.9 6.6 3.6 5.4 5.7 5.1ZCH-50072 4.9 5.2 5.9 6.2 6.3 5.5 3.9 4.9 6.3 3.6 5.2 5.7 4.8VBCH-1505 BG II 4.3 5.3 5.6 6.6 6.4 5.4 4.5 4.1 6.2 4.0 5.3 5.6 4.8PRCH 505 BG II 4.9 5.4 6.1 6.5 6.6 5.6 3.9 5.7 6.1 3.5 5.4 5.9 5.0VICH 5 Bt 5.4 6.5 6.0 7.1 7.0 6.0 4.9 6.7 6.7 3.9 6.1 6.4 5.7LC (Hybrid Check) 4.2 5.1 4.7 6.1 5.5 4.9 3.7 4.5 5.7 3.5 4.8 5.1 4.5VCH-603 BG II 4.4 5.6 6.1 7.0 5.5 5.6 4.0 4.8 6.4 3.5 5.3 5.7 4.9KCH-707 BG II 4.5 5.4 5.0 6.6 5.5 5.2 4.1 4.9 5.7 3.5 5.1 5.4 4.7SP 504 B2 (Dhanno) 5.3 5.5 6.0 6.7 5.4 5.7 4.5 6.0 6.0 3.1 5.3 5.8 5.1GK-217 BG II 5.0 5.3 5.4 6.2 5.5 5.7 4.1 5.4 5.6 3.8 5.2 5.5 4.9PCH 2270 Bt 2 4.7 5.2 5.1 6.0 6.4 4.7 3.9 5.0 5.6 3.5 5.0 5.5 4.5Monsoon Bt 4.1 5.7 5.9 7.0 5.3 5.3 4.0 6.4 5.9 3.1 5.3 5.6 4.9ABCH-1065 5.2 4.6 4.6 5.8 4.1 5.1 3.7 6.1 4.9 4.0 4.8 4.9 4.8NCEH-34 4.9 5.3 5.6 6.5 6.1 4.9 3.9 5.3 5.8 3.2 5.1 5.7 4.6NAMCOT-612 BG II 4.5 5.4 5.4 6.8 5.6 5.6 3.7 4.9 5.8 3.0 5.1 5.5 4.6RCH 2 Bt (Bt check) 4.3 5.1 5.2 6.1 5.6 5.1 3.3 4.8 5.4 3.2 4.8 5.3 4.4

18

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Table 3. Ginning outturn in Set ‘A’ under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Rai

chur

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Dha

rwad

Aru

ppuk

otta

i

Ove

rall

mea

n

Mea

n (I)

Mea

n (R

F)


19

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Lint Index and Seed Index Data recorded on lint index and seed index in ten centres are furnished in Tables 4 and 5. Under irrigated conditions, the mean lint index ranged from 5.1 to 6.9 g, whereas in rainfed conditions, the range was between 4.9 and 6.3 g. The mean seed index ranged from 9.6 to 12.1 g. Table 4. Lint Index (g) in Set ‘A’ under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Rai

chur

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Dha

rwad

Aru

ppuk

otta

i

Ove

rall

mea

n

Mea

n (I)

Mea

n (R

F)


20

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Table 5. Seed Index (g) in Set ‘A’ under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Rai

chur

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Dha

rwad

Aru

ppuk

otta

i

Ove

rall

mea

n

Mea

n (I)

Mea

n (R

F)


21

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Mean Yield under ETL Based Plant Protection Under irrigated conditions, the highest mean seed cotton yield recorded was 2121 kg/ha (340-2 Bt) with 17 % yield increase over RCH 2 Bt (Table 6). Eleven other test hybrids also registered 3 to 12 % yield increase over RCH 2 Bt. The lowest yield recorded was 1428 kg/ha as noted in VBCH 1506 BG II.

Table 6. Mean seed cotton yield under irrigated conditions in Set ‘A’ under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Rai

chur

B'g

udi

Coi

mba

tore

Sri

villi

puth

r

Mea

n (I)

% In

c. o

ver

RC

H 2

Bt

340 – 2 Bt 2120 2084 3519 1278 3193 2933 2521 17JK-Indra Bt 2016 2943 3338 954 2508 2762 2420 12NSPL-405 BG II 1747 2628 3292 681 3064 3093 2417 12NCS 854 Bt2 1594 2126 3112 937 2990 3372 2355 9ANKUR-5642 BGII 1480 2388 3078 834 2885 3441 2351 9Tulasi 7 BGII 2072 2154 3133 1114 3027 2303 2301 7ACH 177-2 1813 2444 3117 968 2971 2325 2273 5VICH 5 Bt 1475 1976 3292 1011 2767 3102 2271 5ABCH-1065 1205 2339 3310 874 2891 2975 2266 5VBCH-1505 BG II 814 2473 3584 953 2829 2889 2257 5UPLHH-5 Bt 1284 2660 3343 991 1956 3252 2248 4PCH 2270 Bt 2 1620 2383 3214 940 2773 2433 2227 3GK-217 BG II 1803 2118 3299 1071 2331 2342 2161 0RCH 2 Bt (Bt check) 1196 2593 3189 841 2193 2928 2157 0NAMCOT-612 BG II 1116 2267 2979 802 2835 2708 2118 -2NCEH-34 1688 2206 3259 978 1923 2619 2112 -2Monsoon Bt 1409 2196 3198 964 2378 2523 2111 -2VCH-603 BG II 1215 2042 3256 924 2471 2742 2108 -2PRCH 505 BG II 1310 2179 3415 1000 2601 2040 2091 -3SBCH 292 1469 2027 3215 799 2107 2886 2084 -3SP 504 B2 (Dhanno) 1405 2549 3133 950 2985 1316 2056 -5ZCH-50072 1465 2066 3024 725 2197 2538 2003 -7KCH-707 BG II 1225 1738 3057 584 1786 2292 1780 -17LC (Hybrid Check) 1673 1929 1817 1269 1771 2210 1778 -18Bunny (Non-Bt check) 1694 2169 1634 878 2308 1562 1707 -21VBCH-1506 BGII 783 1626 2483 383 1848 1446 1428 -34CD @ 5% 393 445 490 216CV % 16 12 12 5

22

�� !" #��

Under rainfed conditions, the highest mean seed cotton yield recorded was 2359 kg/ha (GK 217 BG II) with 26 % yield increase over RCH 2 Bt (Table 7). Nineteen other test hybrids recorded better yield over RCH 2 Bt with 1 – 25 % yield increase over RCH 2 Bt. Table 7. Mean seed cotton yield under rainfed conditions in Set ‘A’ under ETL

based protection

EntryLA

M

Nan

dyal

Adi

laba

d

Dha

rwad

Aru

ppuk

otta

i

Mea

n (R

F)

% In

c. o

ver

RC

H

2 B

t

GK-217 BG II 3269 2343 2091 2192 1898 2359 26340 – 2 Bt 3580 2237 1967 2459 1385 2326 25Tulasi 7 BGII 2682 2275 2121 2441 1908 2285 23ACH 177-2 2715 2122 2101 2831 1470 2248 21VICH 5 Bt 3449 2150 1431 2169 1951 2230 20LC (Hybrid Check) 3126 1818 1802 2357 1680 2157 16JK-Indra Bt 2434 2337 2181 2600 1116 2134 14ABCH-1065 2718 2080 1452 2277 2116 2129 14PCH 2270 Bt 2 3060 2086 1843 2077 1456 2104 13NSPL-405 BG II 2466 2032 1885 2498 1533 2083 12ANKUR-5642 BGII 2939 1920 1586 2502 1354 2060 10NCS 854 Bt2 2456 2317 1615 2838 1062 2058 10PRCH 505 BG II 3014 2085 1524 2068 1576 2054 10SP 504 B2 (Dhanno) 2644 2433 1648 2125 1350 2040 9Monsoon Bt 2573 1964 1864 2349 1418 2034 9ZCH-50072 2488 2358 1277 2409 1602 2027 9NAMCOT-612 BG II 2947 1939 1421 2326 1204 1967 5NCEH-34 2638 2047 1534 2246 1329 1959 5UPLHH-5 Bt 2202 1723 1555 2772 1462 1943 4VCH-603 BG II 2613 1893 1455 2237 1464 1932 4SBCH 292 2131 1777 1421 2537 1466 1866 0RCH 2 Bt (Bt check) 2260 2189 1194 2317 1364 1865 0Bunny (Non-Bt check) 2719 1474 1782 1926 1208 1822 -2KCH-707 BG II 2129 2038 1421 1841 1431 1772 -5VBCH-1505 BG II 1693 1969 752 2746 1585 1749 -6VBCH-1506 BGII 1720 1351 813 2200 1349 1487 -20CD @ 5% 257 763 212 443 623CV % 6 8 8 11 11

23

�� !" #��

Mean lint yield

Under irrigated conditions, the highest mean lint yield was recorded in VBCH 1505 BG II (996 kg/ha) with 14% yield increase over RCH 2 Bt. Seven other test hybrids had registered better lint yield over the best check hybrid with 1 – 11 % increase over RCH 2 Bt (Table 8).

Table 8. Mean lint yield (kg/ha) in irrigated centres in Set ‘A’ under ETL based Protection

Entry

War

anga

l

Sir

ugup

pa

Rai

chur

Coi

mba

tore

Sri

villi

puth

r

Mea

n (I)

% In

c. o

ver

RC

H

2 B

t

VBCH-1505 BG II 264 967 1541 1040 1168 996 14 NSPL-405 BG II 521 970 1251 1043 1052 967 11 JK-Indra Bt 623 1105 1155 859 1012 951 9 NCS 854 Bt2 518 760 1089 1029 1206 921 5 340 – 2 Bt 661 698 1196 1005 1031 918 5 ABCH-1065 443 875 1192 1023 1043 915 5 VCH-603 BG II 441 788 1302 916 1072 904 4 PCH 2270 Bt 2 510 837 1189 971 919 885 1 SBCH 292 489 774 1286 791 1038 876 0 RCH 2 Bt (Bt check) 449 885 1244 736 1053 873 0 Tulasi 7 BGII 638 771 1097 1032 824 872 0 ACH 177-2 604 845 1060 995 841 869 0 VICH 5 Bt 465 667 1185 883 1132 866 -1 SP 504 B2 (Dhanno) 492 958 1253 1097 504 861 -1 UPLHH-5 Bt 369 920 1170 686 1158 860 -1 NAMCOT-612 BG II 359 866 1072 1028 961 857 -2 ANKUR-5642 BGII 454 766 862 902 1248 847 -3 Monsoon Bt 489 777 1215 827 925 846 -3 GK-217 BG II 557 757 1188 784 867 831 -5 NCEH-34 621 773 1173 652 932 830 -5 PRCH 505 BG II 418 769 1195 875 733 798 -9 ZCH-50072 507 731 1089 738 905 794 -9 KCH-707 BG II 397 635 1131 620 827 722 -17 LC (Hybrid Check) 500 735 836 652 869 718 -18 Bunny (Non-Bt check) 464 752 588 766 556 625 -28 VBCH-1506 BGII 248 597 844 663 532 577 -34

24

�� !" #��

Under rainfed conditions, the highest lint yield was recorded in GK 217 BG II (811 kg/ha) with 26% increase over RCH 2 Bt (Table 9). Several other test hybrids showed superior performance in terms of lint yield with 2-24 % increase over RCH 2 Bt. Table 9. Mean lint yield (kg/ha) in rainfed centres in Set ‘A’ under ETL based

protection

EntryLA

M

Nan

dyal

Adi

laba

d

Dha

rwad

Aru

ppuk

otta

i

Mean (RF)

% Inc. over RCH

2 Bt

GK-217 BG II 1142 703 626 840 746 811 26340 – 2 Bt 1261 716 609 868 528 796 24ACH 177-2 939 764 671 1035 535 789 23Tulasi 7 BGII 953 728 593 898 706 776 21VICH 5 Bt 1214 645 472 773 761 773 20ABCH-1065 986 666 450 868 825 759 18LC (Hybrid Check) 1037 618 510 966 630 752 17ZCH-50072 904 849 459 875 609 739 15JK-Indra Bt 840 748 675 1007 407 735 15PRCH 505 BG II 1040 792 487 769 547 727 13NSPL-405 BG II 861 650 565 958 601 727 13SP 504 B2 (Dhanno) 942 827 560 817 486 726 13PCH 2270 Bt 2 1061 668 589 785 505 722 12Monsoon Bt 876 648 615 910 486 707 10NCS 854 Bt2 837 788 484 1048 372 706 10NAMCOT-612 BG II 1036 659 468 895 429 697 9ANKUR-5642 BGII 1053 576 443 884 519 695 8NCEH-34 930 676 521 833 494 691 8VCH-603 BG II 956 644 461 858 505 685 7SBCH 292 793 569 482 1015 497 671 5UPLHH-5 Bt 742 551 436 1041 558 666 4KCH-707 BG II 984 652 454 692 491 654 2RCH 2 Bt (Bt check) 778 700 394 867 471 642 0VBCH-1505 BG II 625 630 240 1098 563 631 -2Bunny (Non-Bt check) 941 501 481 740 445 621 -3VBCH-1506 BGII 593 419 251 843 488 519 -19

25

�� !" #��

FIBRE QUALITY EVALUATION Fibre quality evaluations were done in seven centres using High Volume Instrument. Among the test entries, the fibre length ranged between 26.3 mm and 32.9 mm as compared to 32.8 mm recorded in the best check hybrid, Bunny (Table 10). Table 10. 2.5% Span Length (mm) in Set ‘A’ under ETL based protection

EntryW

aran

gal

Sir

ugup

pa

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Ove

rall

mea

n

Mea

n (I)

Mea

n (R

F)

JK-Indra Bt 29.3 30.9 32.7 33.7 31.4 30.1 30.5 31.2 31.7 30.7Bunny (Non-Bt check) 32.1 33.0 34.1 33.9 32.2 32.0 31.8 32.8 33.3 32.0340 – 2 Bt 31.2 32.3 33.8 32.9 32.9 29.8 32.2 32.3 32.5 31.6VBCH-1506 BGII 30.4 31.4 31.7 33.2 29.1 29.8 26.6 30.1 31.7 28.5ANKUR-5642 BGII 31.4 33.4 33.9 34.7 33.4 32.0 30.3 32.9 33.4 31.9Tulasi 7 BGII 30.7 31.1 32.6 32.6 32.4 27.2 29.9 30.9 31.8 29.8UPLHH-5 Bt 26.0 28.6 28.9 30.2 28.2 27.1 27.2 28.3 28.4 27.5SBCH 292 25.3 26.4 26.4 26.7 24.9 27.9 25.7 26.3 26.2 26.1NSPL-405 BG II 30.0 30.7 32.8 34.6 32.4 28.0 31.3 31.8 32.0 30.6ACH 177-2 30.8 28.6 31.2 31.1 29.4 25.7 29.4 29.4 30.4 28.2NCS 854 Bt2 30.9 32.0 32.9 33.2 30.1 28.8 29.1 30.8 32.2 29.3ZCH-50072 31.1 30.2 31.2 31.0 30.9 27.4 29.2 29.9 30.9 29.2VBCH-1505 BG II 27.2 27.3 28.9 29.2 27.0 25.1 26.0 27.2 28.1 26.0PRCH 505 BG II 32.0 33.8 34.1 34.1 31.1 28.9 32.0 32.0 33.5 30.7VICH 5 Bt 28.6 32.3 31.9 33.3 30.3 28.0 30.1 30.7 31.5 29.5LC (Hybrid Check) 28.3 30.7 28.5 29.6 28.5 30.2 30.9 29.6 29.3 29.9VCH-603 BG II 26.7 27.5 28.6 31.3 28.6 25.7 29.3 28.7 28.5 27.9KCH-707 BG II 28.1 30.2 31.8 32.1 29.2 27.6 30.6 30.3 30.6 29.2SP 504 B2 (Dhanno) 31.4 29.1 33.2 32.6 30.9 29.9 31.1 31.5 31.6 30.6GK-217 BG II 30.6 30.6 31.6 34.2 31.5 29.6 30.8 31.5 31.8 30.6PCH 2270 Bt 2 31.2 29.8 32.4 33.7 31.9 28.5 30.1 31.3 31.8 30.2Monsoon Bt 32.1 34.1 33.2 33.6 31.6 29.0 30.9 31.7 33.3 30.5ABCH-1065 27.9 29.8 30.4 30.1 28.0 27.2 26.5 28.4 29.5 27.3NCEH-34 31.4 33.7 33.3 29.4 32.9 28.6 31.2 31.1 32.0 30.9NAMCOT-612 BG II 27.8 28.4 28.7 33.2 30.0 26.4 27.8 29.2 29.5 28.0RCH 2 Bt (Bt check) 29.1 31.0 32.1 32.7 30.4 28.7 30.3 30.8 31.2 29.8

26

�� !" #��

There was not much variation in U.R % and its value ranged between 48.2 and 52.2 per cent (Table 11). Table 11. Uniformity Ratio in Set ‘A’ under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Coi

mba

tore

Sri

villi

puth

r

LAM

Adi

laba

d

Ove

rall

mea

n

Mea

n (I)

Mea

n (R

F)

JK-Indra Bt 51.0 50.0 51.0 49.0 49.4 50.0 50.1 50.3 49.7Bunny (Non-Bt check) 51.0 48.0 50.7 47.0 49.4 48.0 48.8 49.2 48.7340 – 2 Bt 50.0 47.0 49.3 48.0 46.5 49.0 48.2 48.6 47.7VBCH-1506 BGII 46.0 48.0 50.7 49.0 49.1 48.0 49.2 48.4 48.5ANKUR-5642 BGII 50.0 48.0 48.7 48.0 47.1 50.0 48.4 48.7 48.5Tulasi 7 BGII 51.0 50.0 51.0 47.0 48.7 49.0 48.9 49.8 48.9UPLHH-5 Bt 50.0 51.0 52.0 52.0 52.6 50.0 51.7 51.3 51.3SBCH 292 51.0 51.0 52.3 53.0 53.6 50.0 52.2 51.8 51.8NSPL-405 BG II 48.0 48.0 51.3 47.0 49.2 49.0 49.1 48.6 49.1ACH 177-2 51.0 47.0 51.7 48.0 50.2 49.0 49.7 49.4 49.6NCS 854 Bt2 50.0 51.0 50.3 51.0 48.8 50.0 50.0 50.6 49.4ZCH-50072 49.0 49.0 50.7 49.0 49.1 50.0 49.7 49.4 49.6VBCH-1505 BG II 51.0 51.0 52.0 50.0 51.8 51.0 51.2 51.0 51.4PRCH 505 BG II 50.0 48.0 51.0 47.0 49.3 49.0 49.1 49.0 49.1VICH 5 Bt 51.0 51.0 51.0 47.0 50.3 50.0 49.6 50.0 50.2LC (Hybrid Check) 50.0 50.0 52.3 52.0 50.9 47.0 50.6 51.1 48.9VCH-603 BG II 49.0 49.0 52.0 49.0 49.5 50.0 50.1 49.8 49.8KCH-707 BG II 50.0 50.0 49.3 49.0 50.2 49.0 49.4 49.6 49.6SP 504 B2 (Dhanno) 47.0 49.0 50.3 50.0 48.3 49.0 49.4 49.1 48.7GK-217 BG II 47.0 46.0 50.3 48.0 49.1 50.0 49.4 47.8 49.6PCH 2270 Bt 2 49.0 48.0 49.7 49.0 48.2 49.0 49.0 48.9 48.6Monsoon Bt 51.0 48.0 50.0 50.0 47.9 51.0 49.7 49.8 49.4ABCH-1065 51.0 51.0 52.7 52.0 50.7 51.0 51.6 51.7 50.9NCEH-34 46.0 48.0 48.7 51.0 47.2 50.0 49.2 48.4 48.6NAMCOT-612 BG II 50.0 51.0 52.3 48.0 49.3 49.0 49.7 50.3 49.2RCH 2 Bt (Bt check) 49.0 50.0 51.3 48.0 48.1 48.0 48.9 49.6 48.0

27

�� !" #��

Micronaire varied from 4.1 to 4.7 (Table 12).

Table 12. Micronaire (µg/tex) in Set ‘A’ under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Ove

rall

mea

n

Mea

n (I)

Mea

n (R

F)


28

�� !" #��

In general, the fibre strength was better under irrigated conditions as compared to rainfed conditions. Overall, the strength ranged between 21.1 and 23.3 g/tex (Table 13).

Table 13. Bundle Strength (g/tex) in Set ‘A’ under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Ove

rall

mea

n

Mea

n (I)

Mea

n (R

F)


29

�� !" #��

ETL Based Entomological Evaluation Sucking pests Data on sucking pest incidence like Jassids, white fly, thrips and aphids were recorded on weekly basis in some centres and the mean data indicated not much difference between Bt and non-Bt hybrids (Tables 14-17). Table 14. Jassid / plant in Set ‘A’ under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Rai

chur

B'g

udi

Coi

mba

tore

Lam

Dha

rwad

Ove

rall

mea

n

Mea

n (I)

Mea

n (R

F)


30

�� !" #��

Table 15. Whitefly / plant in Set ‘A’ under ETL based protection Entry Warangal Coimbatore LAM Overall

meanMean (I) Mean (RF)

JK-Indra Bt 5.6 0.2 0.1 2.0 2.9 0.1Bunny (Non-Bt check) 3.2 0.1 0.3 0.2 1.6 0.3340 – 2 Bt 4.8 0.0 1.3 0.6 2.4 1.3VBCH-1506 BGII 4.4 0.1 0.7 0.4 2.3 0.7ANKUR-5642 BGII 5.2 0.0 1.1 0.6 2.6 1.1Tulasi 7 BGII 4.6 0.0 0.6 0.3 2.3 0.6UPLHH-5 Bt 4.2 0.1 0.5 0.3 2.2 0.5SBCH 292 5.8 0.0 0.5 0.3 2.9 0.5NSPL-405 BG II 5.2 0.1 0.7 0.4 2.6 0.7ACH 177-2 4.6 0.1 1.0 0.5 2.3 1.0NCS 854 Bt2 3.2 0.0 1.5 0.7 1.6 1.5ZCH-50072 3.2 0.0 1.4 0.7 1.6 1.4VBCH-1505 BG II 2.8 0.0 1.4 0.7 1.4 1.4PRCH 505 BG II 4.4 0.0 0.9 0.4 2.2 0.9VICH 5 Bt 5.8 0.0 0.7 0.4 2.9 0.7LC (Hybrid Check) 5.2 0.1 0.5 0.3 2.6 0.5VCH-603 BG II 4.6 0.0 0.7 0.4 2.3 0.7KCH-707 BG II 3.4 0.0 0.6 0.3 1.7 0.6SP 504 B2 (Dhanno) 3.8 0.0 0.6 0.3 1.9 0.6GK-217 BG II 4.4 0.1 0.9 0.5 2.3 0.9PCH 2270 Bt 2 4.8 0.0 0.4 0.2 2.4 0.4Monsoon Bt 5.2 0.0 1.2 0.6 2.6 1.2ABCH-1065 5.8 0.0 0.6 0.3 2.9 0.6NCEH-34 4.4 0.0 0.2 0.1 2.2 0.2NAMCOT-612 BG II 6.2 0.1 0.6 0.4 3.2 0.6RCH 2 Bt (Bt check) 5.6 0.0 0.7 0.3 2.8 0.7

31

�� !" #��

Table 16. Thrips / plant in Set ‘A’ under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Rai

chur

B'g

udi

Coi

mba

tore

LAM

Dha

rwad

Ove

rall

mea

n

Mea

n (I)

Mea

n (R

F)


32

�� !" #��

Table 17. Aphid / plant in Set ‘A’ under ETL based protection

Entry

B'g

udi

Coi

mba

tore

LAM

Dha

rwad

Ove

rall

mea

n

Mea

n (I)

Mea

n (R

F)

JK-Indra Bt 1.9 8.7 2.1 0.8 3.4 5.3 1.5Bunny (Non-Bt check) 3.1 10.2 4.3 1.8 5.4 6.6 3.1340 – 2 Bt 2.2 9.8 3.5 0.8 4.7 6.0 2.2VBCH-1506 BGII 3.2 16.3 2.7 1.4 6.8 9.7 2.1ANKUR-5642 BGII 3.1 14.0 2.1 1.5 5.9 8.5 1.8Tulasi 7 BGII 8.6 12.2 9.7 0.5 7.5 10.4 5.1UPLHH-5 Bt 2.2 14.0 4.1 0.4 6.2 8.1 2.3SBCH 292 2.2 14.9 1.4 0.5 5.6 8.6 1.0NSPL-405 BG II 3.7 18.9 3.1 0.2 7.4 11.3 1.7ACH 177-2 4.3 13.1 2.9 0.6 5.5 8.7 1.8NCS 854 Bt2 2.0 8.1 5.6 1.4 5.0 5.0 3.5ZCH-50072 4.2 9.0 2.8 1.0 4.3 6.6 1.9VBCH-1505 BG II 1.6 10.2 1.3 1.0 4.2 5.9 1.1PRCH 505 BG II 1.6 16.5 6.8 0.7 8.0 9.0 3.8VICH 5 Bt 2.3 16.7 6.7 1.2 8.2 9.5 4.0LC (Hybrid Check) 5.2 12.7 3.2 0.7 5.5 9.0 2.0VCH-603 BG II 3.1 10.1 2.9 0.0 4.3 6.6 1.5KCH-707 BG II 2.2 16.3 8.8 0.7 8.6 9.3 4.8SP 504 B2 (Dhanno) 1.4 10.5 5.1 0.9 5.5 6.0 3.0GK-217 BG II 2.0 15.0 7.3 1.2 7.8 8.5 4.3PCH 2270 Bt 2 2.0 13.6 4.2 1.2 6.3 7.8 2.7Monsoon Bt 2.3 10.3 3.5 0.6 4.8 6.3 2.1ABCH-1065 2.0 9.7 2.9 0.7 4.4 5.8 1.8NCEH-34 1.7 11.7 2.5 0.9 5.0 6.7 1.7NAMCOT-612 BG II 3.6 8.3 2.3 0.5 3.7 6.0 1.4RCH 2 Bt (Bt check) 3.0 9.5 1.9 0.1 3.8 6.2 1.0

33

�� !" #��

Percent Square damage

The square damage was comparatively minimum in Bt test entries than the non-Bt local checks. Among the test entries, ACH 177-2, ZCH 50072, PCH 2270 Bt 2, NAMCOT 612 BG II, PRCH 505 BG II recorded the minimum percentage of square damage than all other entries in most of the centres tested ( Table 18).

Table 18. % Square Damage by Bollworm in Set ‘A’ under ETL based protection

Entry

War

anga

l

Rai

chur

Coi

mba

tore

LAM

Dha

rwad

Ove

rall

mea

n

Mea

n (I)

Mea

n (R

F)

JK-Indra Bt 0.0 1.5 0.3 0.0 4.7 1.3 0.6 2.4Bunny (Non-Bt check) 0.0 8.0 2.5 0.0 1.7 2.4 3.5 0.9340 – 2 Bt 0.0 1.1 0.7 0.0 5.0 1.3 0.6 2.5VBCH-1506 BGII 0.0 2.4 0.6 0.0 5.7 1.7 1.0 2.8ANKUR-5642 BGII 0.0 0.0 0.2 0.0 5.4 1.1 0.1 2.7Tulasi 7 BGII 0.0 0.8 0.0 0.0 5.4 1.2 0.3 2.7UPLHH-5 Bt 1.5 0.0 0.1 0.0 6.1 1.5 0.5 3.0SBCH 292 0.0 0.4 0.0 0.0 4.1 0.9 0.1 2.1NSPL-405 BG II 0.0 0.5 0.2 0.0 4.0 0.9 0.2 2.0ACH 177-2 1.2 0.8 0.0 0.0 0.9 0.6 0.7 0.4NCS 854 Bt2 0.0 0.3 0.0 0.0 8.0 1.7 0.1 4.0ZCH-50072 0.0 0.0 0.0 0.0 2.9 0.6 0.0 1.5VBCH-1505 BG II 0.0 0.1 0.0 0.0 9.2 1.9 0.0 4.6PRCH 505 BG II 0.0 0.0 0.2 0.0 3.3 0.7 0.1 1.6VICH 5 Bt 0.0 0.2 0.0 0.0 6.0 1.2 0.1 3.0LC (Hybrid Check) 3.1 15.2 0.4 0.0 3.3 4.4 6.3 1.6VCH-603 BG II 0.0 0.0 0.0 0.0 11.7 2.3 0.0 5.9KCH-707 BG II 0.0 0.0 0.0 0.0 8.4 1.7 0.0 4.2SP 504 B2 (Dhanno) 0.0 0.0 0.2 0.0 3.4 0.7 0.1 1.7GK-217 BG II 0.0 0.0 0.0 0.0 7.2 1.4 0.0 3.6PCH 2270 Bt 2 1.1 0.0 0.0 0.0 2.3 0.7 0.4 1.1Monsoon Bt 2.6 0.0 0.0 0.0 8.1 2.1 0.9 4.1ABCH-1065 0.0 0.0 0.0 0.0 6.0 1.2 0.0 3.0NCEH-34 0.0 0.3 0.0 0.0 4.3 0.9 0.1 2.1NAMCOT-612 BG II 0.0 0.0 0.0 0.0 2.7 0.5 0.0 1.3RCH 2 Bt (Bt check) 0.8 0.0 0.0 0.0 4.5 1.1 0.3 2.3

34

�� !" #��

Pink boll worm damage Very less incidence of Pink bollworm and damage in green bolls was recorded in most of the hybrids except ZCH 50072 which had 0.4 larvae / 20 green bolls and 2.1 % damage in green bolls (Table 19). Table 19. Pink Bollworm in Set ‘A’ under ETL based protection

Coimbatore

LAM Overall mean

Warangal

Coimbatore

LAM Overall mean


Larvae / 20 green bollsEntry

��

35

�� !" #��

��

In general, Open boll damage in terms of both boll basis and locule basis was less in the Bt test entries as compared to non-Bt checks (Table 20).

Table 20. Open boll damage (%) in Set ‘A’ under ETL based protection

Sir

ugup

pa

B'g

udi

Coi

mba

tore

LAM

Ove

rall

mea

n

Sir

ugup

pa

B'g

udi

Coi

mba

tore

LAM

Dha

rwad

Ove

rall

mea

n

JK-Indra Bt 7.2 6.6 1.0 0.0 3.7 4.6 10.1 2.2 0.0 10.9 5.6Bunny (Non-Bt check) 11.0 9.8 6.0 0.0 6.7 6.6 13.0 1.7 0.0 18.6 8.0340 – 2 Bt 12.2 6.6 0.7 0.0 4.9 4.0 11.9 0.0 0.0 5.9 4.3VBCH-1506 BGII 12.3 1.7 0.3 0.0 3.6 4.6 5.9 0.0 0.0 5.6 3.2ANKUR-5642 BGII 12.2 2.4 0.0 0.0 3.6 2.2 14.4 0.2 0.0 8.1 5.0Tulasi 7 BGII 12.4 4.5 0.0 0.0 4.2 10.9 11.3 0.0 0.0 5.8 5.6UPLHH-5 Bt 7.8 4.8 2.7 0.0 3.8 2.4 14.7 0.0 0.0 11.5 5.7SBCH 292 12.4 1.5 4.7 0.0 4.7 2.3 9.6 0.0 0.0 16.4 5.7NSPL-405 BG II 12.6 0.9 0.0 0.0 3.4 6.2 12.4 0.0 0.0 15.5 6.8ACH 177-2 9.1 4.0 1.0 0.0 3.5 3.7 13.4 0.0 0.0 12.6 5.9NCS 854 Bt2 12.2 3.5 4.2 0.0 5.0 6.0 14.2 0.0 0.0 13.5 6.7ZCH-50072 12.7 4.6 1.8 0.0 4.8 5.8 10.1 1.7 0.0 5.7 4.7VBCH-1505 BG II 7.2 0.8 1.5 0.0 2.4 6.4 12.4 0.0 0.0 15.3 6.8PRCH 505 BG II 12.0 5.9 1.0 0.0 4.7 3.7 16.9 0.0 0.0 7.2 5.6VICH 5 Bt 12.2 0.8 0.3 0.0 3.3 7.4 10.9 0.0 0.0 16.0 6.9LC (Hybrid Check) 12.4 0.8 0.3 0.0 3.4 13.1 17.7 0.0 0.0 17.5 9.7VCH-603 BG II 13.6 0.0 0.0 0.0 3.4 7.1 11.0 0.0 0.0 5.6 4.7KCH-707 BG II 12.1 3.6 0.0 0.0 3.9 3.1 18.2 0.2 0.0 10.7 6.5SP 504 B2 (Dhanno) 8.3 0.9 0.0 0.0 2.3 10.7 7.4 0.0 0.0 11.0 5.8GK-217 BG II 13.2 5.1 1.7 0.0 5.0 6.1 10.7 0.0 0.0 10.1 5.4PCH 2270 Bt 2 11.5 3.1 1.7 0.0 4.0 2.5 9.9 0.5 0.0 14.0 5.4Monsoon Bt 5.1 2.6 0.7 0.0 2.1 10.8 10.7 0.0 0.0 20.8 8.5ABCH-1065 13.2 2.4 1.3 0.0 4.2 5.7 13.6 0.0 0.0 10.8 6.0NCEH-34 13.0 1.7 0.3 0.0 3.7 5.9 11.8 0.0 0.0 18.6 7.3NAMCOT-612 BG II 13.0 4.0 0.7 0.0 4.4 5.8 13.7 0.0 0.0 11.3 6.2RCH 2 Bt (Bt check) 5.9 4.0 0.0 0.0 2.5 5.0 5.8 0.0 0.0 11.2 4.4

Entry

��

36

�� !" #��

EVALUATION UNDER UNPROTECTED CONDITIONS

Germination and Plant Stand

Good germination and plant stand was maintained under unprotected condition in both irrigated and rainfed trials (Table 21).

Table 21. Germination and Plant Stand under Unprotected condition

Coi

mba

tore

Sri

villi

puth

r

LAM

Ove

rall

mea

n

Coi

mba

tore

LAM

Ove

rall

mea

n


Germination (%) Stand at harvest (No. of plants)

Entry

37

�� !" #��

Open boll damage The mean percentage of open damage due to bollworm on both boll and locule basis was low at Coimbatore and at Lam whereas, it was high at Srivilliputhur. Under unprotected condition, some Bt test hybrids like VBCH 1505 BG II, VBCH 1506 BG II, VCH 603 BG II and Monsoon Bt exhibited more open boll damage as compared to non Bt check hybrids (Table 22). Table 22. Open Boll Damage – Boll basis (%) under unprotected condition

Coi

mba

tore

Sri

villi

puth

r

LAM

Aru

ppuk

otta

i

Ove

rall

mea

n

Coi

mba

tore

Sri

villi

puth

r

LAM

Dha

rwad

Aru

ppuk

otta

i

Ove

rall

mea

n

JK-Indra Bt 0.0 7.6 0.0 5.9 3.4 0.0 7.6 0.0 5.4 5.5 3.7Bunny (Non-Bt check) 1.0 18.8 0.0 3.8 5.9 0.0 10.0 0.0 10.0 3.5 4.7340 – 2 Bt 0.0 9.0 0.0 6.1 3.8 0.0 7.5 0.0 7.7 5.7 4.2VBCH-1506 BGII 1.5 20.9 0.0 7.0 7.3 0.0 8.8 0.0 4.7 6.6 4.0ANKUR-5642 BGII 0.0 5.2 0.0 6.5 2.9 0.0 8.9 0.0 5.7 6.1 4.1Tulasi 7 BGII 0.0 5.2 0.0 4.0 2.3 0.0 7.6 0.0 9.2 3.6 4.1UPLHH-5 Bt 1.5 8.0 0.0 4.4 3.5 0.0 8.9 0.0 14.3 4.0 5.4SBCH 292 0.0 8.3 0.0 4.7 3.3 0.0 8.8 0.0 10.4 4.3 4.7NSPL-405 BG II 1.0 6.1 0.0 4.3 2.8 0.0 10.0 0.0 14.3 3.8 5.6ACH 177-2 0.0 5.5 0.0 7.1 3.2 0.0 6.3 0.0 13.9 3.7 4.8NCS 854 Bt2 1.5 4.9 0.0 2.6 2.3 0.0 8.8 0.0 8.3 2.2 3.9ZCH-50072 2.5 6.2 0.0 5.4 3.5 0.0 7.5 0.0 13.3 5.1 5.2VBCH-1505 BG II 0.0 25.4 0.0 2.9 7.1 0.0 10.0 0.0 13.9 2.5 5.3PRCH 505 BG II 0.0 8.0 0.0 2.8 2.7 0.0 8.8 0.0 11.7 2.5 4.6VICH 5 Bt 0.0 6.0 0.0 4.7 2.7 0.0 7.5 0.0 12.3 4.3 4.8LC (Hybrid Check) 2.0 8.4 0.0 7.5 4.5 1.5 7.5 0.0 12.2 7.1 5.7VCH-603 BG II 0.0 22.0 0.0 1.4 5.9 0.0 12.6 0.0 11.9 1.1 5.1KCH-707 BG II 0.0 5.4 0.0 6.8 3.1 0.0 8.8 0.0 18.5 6.5 6.8SP 504 B2 (Dhanno) 0.0 9.0 0.0 3.9 3.2 0.0 10.1 0.0 5.6 3.5 3.8GK-217 BG II 0.0 8.9 0.0 4.1 3.3 0.0 6.4 0.0 11.0 3.7 4.2PCH 2270 Bt 2 0.0 5.3 0.0 5.3 2.7 0.0 5.0 0.0 5.7 4.9 3.1Monsoon Bt 1.0 19.3 0.0 5.4 6.4 0.0 11.3 0.0 20.0 5.1 7.3ABCH-1065 0.0 8.9 0.0 3.3 3.0 0.0 5.0 0.0 4.9 2.9 2.6NCEH-34 0.0 18.5 0.0 3.7 5.5 0.0 13.8 0.0 9.3 3.2 5.2NAMCOT-612 BG II 0.0 8.1 0.0 5.3 3.4 0.0 8.8 0.0 5.7 4.7 3.8RCH 2 Bt (Bt check) 1.5 4.6 0.0 4.6 2.7 0.0 8.8 0.0 6.5 4.2 3.9

Boll basis Locule Basis

Entry

38

�� !" #��


Under irrigated unprotected conditions, out of 23 Bt test hybrids evaluated, six test Bt hybrid entries recorded higher seed cotton yield ranging from 2057 to 2137 Kg/ha as compared to the Bt Check hybrid RCH 2 Bt, which recorded a mean seed cotton yield of 1846 kg/ha (Table 23). Table 23. Seed cotton yield (kg/ha) in irrigated locations under unprotected conditions

Entry Coimbatore Srivilliputhr Mean (I) % Inc. over RCH 2 Bt

ACH 177-2 1327 2946 2137 16Monsoon Bt 1127 3128 2128 15UPLHH-5 Bt 972 3222 2097 14VICH 5 Bt 725 3440 2083 13JK-Indra Bt 1466 2685 2076 12SP 504 B2 (Dhanno) 1219 2894 2057 11RCH 2 Bt (Bt check) 1049 2642 1846 0PCH 2270 Bt 2 1219 2444 1832 -1GK-217 BG II 1096 2504 1800 -2Bunny (Non-Bt check) 957 2625 1791 -3ANKUR-5642 BGII 687 2876 1782 -3Tulasi 7 BGII 1111 2426 1769 -4NCEH-34 849 2564 1707 -8NCS 854 Bt2 1281 2070 1676 -9PRCH 505 BG II 1265 1889 1577 -15ZCH-50072 694 2451 1573 -15NSPL-405 BG II 849 2255 1552 -16VBCH-1506 BGII 191 2868 1530 -17LC (Hybrid Check) 1065 1898 1482 -20KCH-707 BG II 741 2054 1398 -24VBCH-1505 BG II 1250 -- 1250 -32SBCH 292 756 1680 1218 -34340 – 2 Bt 926 1490 1208 -35NAMCOT-612 BG II 1065 1308 1187 -36VCH-603 BG II 756 1058 907 -51ABCH-1065 818 --- 818 -56CD @ 5% 590CV % 6

39

�� !" #��

Rainfed

Among the 23 Bt test hybrids evaluated under rainfed situation, several hybrids exhibited superiority in yield (11 to 101 %) over the Bt check hybrid (Table 24).

Table 24. Seed cotton yield (kg/ha) in rainfed locations under unprotected conditions

Entry LAM Aruppukottai Mean (RF) % Inc. over RCH 2 Bt

340 – 2 Bt 2506 1180 1843 101LC (Hybrid Check) 1755 1485 1620 76ACH 177-2 1718 1417 1568 71GK-217 BG II 1580 1494 1537 67Tulasi 7 BGII 1478 1540 1509 64Bunny (Non-Bt check) 1801 1192 1497 63ABCH-1065 1224 1575 1400 52NSPL-405 BG II 1409 1351 1380 50NCS 854 Bt2 1409 1283 1346 46JK-Indra Bt 1489 1164 1327 44UPLHH-5 Bt 1349 1289 1319 44SBCH 292 1325 1238 1282 39VCH-603 BG II 1178 1367 1273 38PCH 2270 Bt 2 1441 1078 1260 37PRCH 505 BG II 1097 1416 1257 37NCEH-34 1270 1203 1237 35Monsoon Bt 1339 1118 1229 34SP 504 B2 (Dhanno) 1233 1217 1225 33VICH 5 Bt 1039 1295 1167 27ZCH-50072 910 1335 1123 22KCH-707 BG II 956 1277 1117 21NAMCOT-612 BG II 947 1181 1064 16ANKUR-5642 BGII 970 1069 1020 11RCH 2 Bt (Bt check) 716 1121 919 0VBCH-1505 BG II 369 1419 894 -3VBCH-1506 BGII 249 1056 653 -29CD @ 5% 912CV % 29

40

�� !" #��

PATHOLOGICAL EVALUATION The pathological observations like incidence of major diseases Bacterial leaf blight, alternaria leaf spot, grey mildew, myrothecium leaf spot and other diseases like Helminthosporium leaf spot, Colletotrichum boll rot were recorded under natural conditions and are presented centre-wise.

Lam, Guntur: In general, bacterial blight and grey mildew were the diseases that were noticed in the test and check hybrids. Most of the test hybrids recorded moderate incidence of the diseases with the few like ZCH 50072, 340-2 Bt, NSPL 405 BG II, NCEH 34 recording lesser incidence of the diseases.

Warangal: Mild incidence of bacterial blight and grey mildew were noticed with Bt and non Bt hybrids recording equally less level of incidence. However, Colletotrichum boll rot could be noticed at less than ten per cent in bolls of both Bt and non Bt hybrids. Similarly, mild incidence of Tobacco Streak Virus with chlorotic mottles could be noticed in both Bt and non Bt hybrids.

Coimbatore: No incidence of Alternaria leaf spot, bacterial blight or grey mildew could be noticed among the Bt hybrids tested. However, very less incidence of seedling rot could be seen with incidence grade being one in most of the hybrids with appearance showing 30 days after sowing in all test and check hybrids.

Srivilliputhur: Initiation of bacterial blight disease was noticed in infestor row of susceptible check, while mild incidence with grade I being noticed in certain test hybrids and check hybrids from 90 days after sowing stage. Most of the test hybrids did not show any disease symptom due to Myrothecium leaf spot, while very few hybrids like JK Indra Bt, Bunny and Ankur 5642 BG II, UPLHH 5 Bt, PRCH 505 BG II, local check hybrid registered mild incidence at later stages of growth.

Aruppukottai: None of the test entries showed the incidence of bacterial leaf blight, grey mildew and Cercospora leaf spot upto 45 days after sowing. Lower level of disease incidence of Cercospora and grey mildew was noticed after 120 days after sowing in most of the hybrids including check hybrids.

Beemarayangudi: Alternaria leaf spot, bacterial blight and rust were noticed only during later stages of growth with both Bt test hybrids and check hybrids reporting similar levels of grade of infection. Leaf reddening has also been observed in most of the Bt test hybrids at 150 days after sowing stage.

41

�� !" #��

TRIAL – SET ‘B’

Germination and Final Plant Stand Both germination and plant stand at harvest was satisfactory in all the entries except GK-205 BG II under both irrigated and rainfed situations (Table 25).

Table 25. Germination (%) and Plant Stand in Set ‘B’ under ETL based protection C

oim

bato

re

Aru

ppuk

otta

i

Ove

rall

mea

n

Sir

ugup

pa

B'g

udi

Coi

mba

tore

LAM

Ove

rall

mea

n

NCEH- 29 92.8 94.0 93.4 57.0 48.7 50.3 59.7 53.9ABCH-1020 89.4 94.0 91.7 58.0 48.3 49.7 59.7 53.9KDCHH 9632 BG II 83.9 100.0 91.9 59.0 47.7 49.7 59.0 53.8LC (Hybrid Check) 81.1 92.0 86.6 59.0 47.0 52.3 59.7 54.5PRCH 504 BG II 90.0 99.0 94.5 57.0 48.3 53.3 60.0 54.7NSPL -999 BG II 91.7 96.0 93.8 59.0 47.0 55.0 58.3 54.8PCH 105 Bt 2 78.9 97.0 87.9 59.0 47.0 51.3 58.7 54.0SBCH 284 91.7 95.0 93.3 59.0 49.3 52.3 59.0 54.9UPLHH-12 Bt 86.1 96.0 91.1 59.0 48.7 49.3 58.3 53.8KCH-135 Bt II 86.7 100.0 93.3 59.0 47.7 48.3 59.0 53.5VCH-602 BG II 80.6 96.0 88.3 57.0 46.7 48.3 58.7 52.7113 – 2 Bt 80.0 82.0 81.0 60.0 43.7 50.7 58.0 53.1Tulasi 118 BGII 81.1 92.0 86.6 60.0 47.7 52.0 59.0 54.7Bunny (Non-Bt check) 93.3 97.0 95.2 60.0 48.0 56.0 58.0 55.5GK-205 BG II 71.7 46.0 58.8 54.0 36.7 44.0 59.7 48.6VICH 15 Bt 92.2 98.0 95.1 59.0 48.0 50.7 59.3 54.2ANKUR-10122 BGII 85.6 98.0 91.8 60.0 45.3 48.7 59.0 53.3JKCH-2245 Bt 93.3 90.0 91.7 60.0 48.0 52.3 59.7 55.0RCH 2 Bt (Bt check) 97.8 93.0 95.4 60.0 47.3 53.3 59.0 54.9ACH 155-2 94.4 99.0 96.7 60.0 48.3 56.7 60.0 56.3NCS 207 Bt 2 83.9 93.0 88.4 59.0 47.0 53.7 59.7 54.8NAMCOT-607 BG II 95.0 98.0 96.5 59.0 46.7 52.0 59.0 54.2SP 1037 B2 92.2 96.0 94.1 58.0 46.0 55.7 59.3 54.7GBCH 04 92.8 92.0 92.4 59.0 46.7 55.7 60.0 55.3MLCH- 318 BGII 90.6 94.0 92.3 57.0 47.0 54.3 60.0 54.6RCH- 596 BGII 85.6 93.0 89.3 59.0 48.7 50.0 59.0 54.2

Germination %

Entry

Stand at harvest (number of plants)

42

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Boll Weight

Mean boll weight of the Bt hybrids ranged from 4.3 to 5.6 g over different locations (Table 26). Among all the hybrids tested, the highest boll weight was recorded in UPLHH 12 Bt (5.6g).

Table 26. Boll weight (g) in Set ‘B’ under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Rai

chur

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Dha

rwad

Aru

ppuk

otta

i

Ove

rall

mea

n

Mea

n (I)

Mea

n (R

F)

NCEH- 29 4.1 5.3 5.9 5.7 5.5 5.7 3.8 4.9 6.0 3.6 5.0 5.3 4.8ABCH-1020 4.5 5.1 5.0 6.5 5.7 5.7 3.7 4.3 6.0 3.5 5.0 5.4 4.7KDCHH 9632 BG II 4.5 5.4 6.0 5.9 6.0 4.9 4.7 4.9 6.0 3.9 5.2 5.6 4.9LC (Hybrid Check) 3.9 4.9 4.7 6.4 5.6 4.3 3.2 4.3 5.6 4.0 4.7 5.1 4.3PRCH 504 BG II 4.3 5.9 5.7 6.3 5.9 6.5 3.8 4.9 6.0 3.6 5.3 5.6 5.0NSPL -999 BG II 4.9 5.6 5.7 6.8 5.8 5.0 3.5 6.3 6.3 3.8 5.4 5.8 5.0PCH 105 Bt 2 4.4 5.8 5.4 6.1 6.4 6.0 3.2 5.0 6.4 3.9 5.3 5.6 4.9SBCH 284 4.4 5.4 5.7 5.8 6.2 5.4 4.4 4.6 5.8 3.7 5.1 5.5 4.8UPLHH-12 Bt 4.9 5.9 5.3 6.9 6.0 6.5 4.3 6.1 6.2 4.0 5.6 5.8 5.4KCH-135 Bt II 4.0 5.1 5.5 6.4 5.0 6.1 3.8 4.3 5.4 3.6 4.9 5.2 4.6VCH-602 BG II 4.3 5.8 5.8 6.5 5.9 5.5 3.7 4.9 6.3 3.7 5.2 5.7 4.8113 – 2 Bt 4.8 5.7 5.4 6.4 5.1 5.2 3.2 5.4 5.7 3.7 5.1 5.5 4.6Tulasi 118 BGII 4.7 5.7 5.9 6.3 5.5 4.6 3.6 6.1 6.0 4.0 5.2 5.6 4.9Bunny (Non-Bt check) 4.6 5.4 4.7 6.0 6.0 6.0 3.1 4.4 5.4 3.6 4.9 5.3 4.5GK-205 BG II 3.5 4.5 4.9 5.9 4.6 6.2 3.6 3.4 5.3 3.8 4.6 4.7 4.4VICH 15 Bt 4.3 5.4 5.6 5.5 5.9 5.6 3.7 4.4 5.3 3.6 4.9 5.3 4.5ANKUR-10122 BGII 4.5 5.4 5.0 5.8 5.2 5.5 3.5 5.2 5.3 3.6 4.9 5.2 4.6JKCH-2245 Bt 4.3 4.9 5.3 5.5 5.4 6.0 3.2 4.3 5.1 3.0 4.7 5.1 4.3RCH 2 Bt (Bt check) 3.7 5.1 5.1 5.0 4.7 6.3 3.0 4.2 5.2 3.3 4.6 4.7 4.4ACH 155-2 4.5 5.1 5.0 6.4 5.1 5.2 3.6 5.2 5.4 3.5 4.9 5.2 4.6NCS 207 Bt 2 5.8 6.0 6.1 6.7 6.4 5.2 3.7 5.3 5.8 3.6 5.5 6.2 4.7NAMCOT-607 BG II 3.8 4.5 4.4 4.9 5.5 5.2 3.3 3.5 4.8 3.2 4.3 4.6 4.0SP 1037 B2 4.5 5.1 5.7 6.2 6.0 5.2 3.1 4.8 5.7 3.7 5.0 5.5 4.5GBCH 04 4.1 5.7 5.8 6.3 6.0 4.6 3.8 4.6 5.6 3.3 5.0 5.6 4.4MLCH- 318 BGII 3.7 4.6 3.9 6.9 4.9 6.0 3.2 4.2 4.6 3.1 4.5 4.8 4.2RCH- 596 BGII 4.7 5.4 5.6 6.5 5.5 4.6 3.1 4.9 5.8 3.3 5.0 5.5 4.4

43

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Ginning Outturn (%)

The overall ginning outturn ranged from 32.8 to 38.1 % (table 27).

Table 27. Ginning outturn in Set ‘B’ under ETL based protection

EntryW

aran

gal

Sir

ugup

pa

Rai

chur

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Dha

rwad

Aru

ppuk

otta

i

Ove

rall

mea

n

Mea

n (I)

Mea

n (R

F)


44

�� !" #��

Lint Index The lint index varied from 5.5 g (JKCH 2245 Bt and MLCH 318 BG II) to 6.8 g (VCH 602 BG II) in Set ‘B’ (Table 28). Table 28. Lint Index (g) in Set ‘B’ under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Rai

chur

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Dha

rwad

Aru

ppuk

otta

i

Ove

rall

mea

n

Mea

n (I)

Mea

n (R

F)


45

�� !" #��

Seed Index

The seed index ranged between 9.7 and 12.3 g (Table 29) in Set ‘B’.

Table 29. Seed Index (g) in Set ‘B’ under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Rai

chur

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Dha

rwad

Aru

ppuk

otta

i

Ove

rall

mea

n

Mea

n (I)

Mea

n (R

F)


46

�� !" #��

Mean Seed Cotton Yield under ETL Based Plant Protection

Under irrigated conditions, the seed cotton yield ranged between 1516 kg/ha (GK 205 BG II) and 2752 kg/ha (ACH 155-2). Nineteen test hybrids recorded higher seed cotton yield over RCH 2 Bt check hybrid ranging from 5 to 32 % (Table 30).

Table 30. Mean seed cotton yield under irrigated conditions in Set ‘B’ under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Rai

chur

B'g

udi

Coi

mba

tore

Sri

villi

puth

r

Mean (I)

% Inc. over RCH 2Bt

ACH 155-2 2210 2697 3448 1765 3203 3186 2752 32VICH 15 Bt 1475 3169 3502 1430 2747 3603 2654 28JKCH-2245 Bt 1682 3375 3469 1827 2573 2904 2638 27NCS 207 Bt 2 1820 3961 3425 1108 2567 2785 2611 26KDCHH 9632 BG II 1343 3387 3426 1853 2386 3143 2590 25NSPL -999 BG II 1580 2780 2964 1094 3496 3557 2579 24PCH 105 Bt 2 2012 2683 3271 1541 2433 3233 2529 22Tulasi 118 BGII 1898 2770 3178 1315 3242 2708 2518 21PRCH 504 BG II 1762 2806 3181 1387 2848 3066 2508 21NAMCOT-607 BG II 1622 3156 2866 1381 2841 2805 2445 18KCH-135 Bt II 1632 2820 2818 1392 2714 2847 2370 14ANKUR-10122 BGII 1425 2655 2990 1781 2664 2600 2353 13113 – 2 Bt 1445 2594 3150 1377 2460 2994 2337 12SP 1037 B2 1373 2638 2876 1412 2741 2742 2297 11RCH- 596 BGII 1355 2879 3418 1357 1893 2732 2272 9VCH-602 BG II 1091 3221 2614 1146 2306 2928 2218 7UPLHH-12 Bt 1312 2698 2732 1446 2179 2936 2217 7ABCH-1020 1656 2699 2906 1143 2446 2214 2177 5MLCH- 318 BGII 1329 2968 2818 1157 2466 2315 2176 5RCH 2 Bt (Bt check) 1283 2347 2716 1213 2172 2739 2078 0NCEH- 29 1410 2501 2797 972 1744 1952 1896 -9GBCH 04 1021 1970 2307 778 2313 2793 1864 -10SBCH 284 1188 2058 2159 750 2018 2850 1837 -12Bunny (Non-Bt check) 2087 2085 1320 1533 1427 2195 1774 -15LC (Hybrid Check) 1766 1543 1606 1553 1638 2006 1685 -19GK-205 BG II 758 1437 2546 761 1665 1932 1516 -27CD @ 5% 407 519 450 231CV % 16 12 11 5

47

�� !" #��

Under rainfed conditions, the highest seed cotton yield was recorded in KDCHH 9632 BG II (2311 kg/ha) with 24 % yield increase over RCH 2 Bt check hybrid which recorded a mean yield of 1864 kg/ha (Table 31). Several other hybrids also registered yield increase of 1 to 24 over RCH 2 Bt including local check hybrids. Table 31. Mean seed cotton yield under rainfed conditions in Set ‘B’ under ETL

based protection

Entry

LAM

Nan

dyal

Adi

laba

d

Dha

rwad

Aru

ppuk

otta

i

Mean (RF)

% Inc. over

RCH 2 Bt

KDCHH 9632 BG II 3255 2388 1545 2995 1372 2311 24NCS 207 Bt 2 3402 2020 2245 2426 1443 2307 24ACH 155-2 2492 2128 2121 2770 2009 2304 24VICH 15 Bt 3135 2132 1689 2376 2087 2284 23NSPL -999 BG II 2806 2307 1895 2478 1852 2268 22PCH 105 Bt 2 3052 2117 2091 2324 1449 2207 18LC (Hybrid Check) 3449 1186 1843 2341 1848 2133 14SP 1037 B2 3028 2160 1699 2204 1571 2132 14ABCH-1020 3039 1795 2338 2140 1195 2101 13KCH-135 Bt II 3147 1998 1472 2275 1548 2088 12MLCH- 318 BGII 2546 2208 2060 2248 1363 2085 12JKCH-2245 Bt 3053 2043 1689 1966 1556 2061 11Tulasi 118 BGII 2644 1968 1637 2057 1992 2060 10PRCH 504 BG II 2779 1852 1812 2241 1433 2024 9NAMCOT-607 BG II 2575 1988 1606 2394 1497 2012 8113 – 2 Bt 2845 1798 1884 1983 1544 2011 8UPLHH-12 Bt 2787 1486 1750 2265 1520 1962 5ANKUR-10122 BGII 3041 1853 1812 1374 1542 1924 3NCEH- 29 2660 2282 1493 1863 1103 1880 1RCH 2 Bt (Bt check) 2511 1946 1483 2045 1337 1864 0RCH- 596 BGII 2583 1746 1627 1856 1443 1851 -1VCH-602 BG II 2659 1470 1174 2140 1567 1802 -3Bunny (Non-Bt check) 2503 1199 1596 1742 1563 1721 -8SBCH 284 1921 1597 1267 1759 1519 1613 -13GK-205 BG II 2283 1723 855 1532 1475 1573 -16GBCH 04 2299 1144 1019 1578 1236 1455 -22CD @ 5% 376 825 429 564 638CV % 8 9 16 16 10

48

�� !" #��

Lint yield under ETL based protection

Under irrigated condition, lint yield ranged between 618 kg/ha (GK 205 BG II) and 1121 kg/ha (VICH 15 Bt). The Bt check hybrid was observed to have 780 kg/ha of lint yield (Table 32).

Table 32. Mean lint yield (kg/ha) in irrigated centres in Set ‘B’ under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Rai

chur

Coi

mba

tore

Sri

villi

puth

r

Mean (I)% Inc. over RCH 2 BT

VICH 15 Bt 549 1192 1366 1046 1453 1121 44ACH 155-2 767 992 1379 1106 1131 1075 38NSPL -999 BG II 539 962 1126 1195 1328 1030 32NCS 207 Bt 2 606 1398 1233 902 1006 1029 32Tulasi 118 BGII 716 984 1239 1152 950 1008 29JKCH-2245 Bt 629 1153 1284 881 1074 1004 29NAMCOT-607 BG II 568 1204 1118 1021 1029 988 27PCH 105 Bt 2 803 969 1178 797 1187 987 26PRCH 504 BG II 641 974 1145 966 1140 973 25KCH-135 Bt II 614 957 1127 938 1081 943 21113 – 2 Bt 480 979 1166 856 1184 933 20KDCHH 9632 BG II 428 1090 1233 751 1123 925 19VCH-602 BG II 418 1212 1098 819 1073 924 18SP 1037 B2 504 960 1035 918 1024 888 14ANKUR-10122 BGII 459 906 1136 877 935 863 11MLCH- 318 BGII 480 1027 1014 836 866 845 8RCH- 596 BGII 522 951 1196 573 973 843 8UPLHH-12 Bt 463 926 1011 742 1043 837 7RCH 2 Bt (Bt check) 446 770 951 728 1004 780 0SBCH 284 403 752 842 754 1113 773 -1ABCH-1020 479 865 988 737 792 772 -1GBCH 04 411 706 854 782 1003 751 -4NCEH- 29 441 816 979 529 691 691 -11Bunny (Non-Bt check) 874 696 475 481 785 662 -15LC (Hybrid Check) 634 598 658 588 794 654 -16GK-205 BG II 291 510 1018 554 718 618 -21CD @ 5% 185 172 113CV % 12 13 7

49

�� !" #��

Under rainfed conditions also, the highest lint yield of 858 kg/ha was recorded in VICH 15 Bt with 34 % yield increase over RCH 2 Bt (Table 33). Only four test hybrids recorded lesser lint yield than RCH 2 Bt. Notably local check hybrid also registered higher lint yield over RCH 2 Bt. Table 33. Mean lint yield (kg/ha) in rainfed centres in Set ‘B’ under ETL based

protection

EntryLA

M

Nan

dyal

Adi

laba

d

Dha

rwad

Aru

ppuk

otta

i

Mean (RF)

% Inc. over

RCH 2 Bt

VICH 15 Bt 1146 768 675 911 789 858 34ACH 155-2 896 724 770 1021 757 834 30PCH 105 Bt 2 1106 762 814 890 549 824 29NCS 207 Bt 2 1214 727 717 936 486 816 28NSPL -999 BG II 981 785 681 936 687 814 27KDCHH 9632 BG II 1132 716 494 1135 520 800 25LC (Hybrid Check) 1213 379 792 900 682 793 24SP 1037 B2 1060 756 684 844 522 773 21Tulasi 118 BGII 980 630 703 768 727 761 19MLCH- 318 BGII 874 729 760 848 469 736 15PRCH 504 BG II 1016 593 652 847 545 730 14KCH-135 Bt II 1087 639 544 818 542 726 14JKCH-2245 Bt 1064 654 658 713 513 720 13113 – 2 Bt 988 611 621 788 585 719 12NAMCOT-607 BG II 891 676 545 941 494 710 11UPLHH-12 Bt 986 446 646 833 587 699 9ABCH-1020 1043 538 677 752 428 688 8VCH-602 BG II 931 559 445 828 533 659 3ANKUR-10122 BGII 1073 593 543 499 513 644 1RCH- 596 BGII 929 506 665 638 479 644 1RCH 2 Bt (Bt check) 874 623 489 741 467 639 0NCEH- 29 911 776 462 653 387 638 0Bunny (Non-Bt check) 919 408 654 633 519 626 -2GK-205 BG II 820 603 389 547 494 571 -11SBCH 284 652 511 417 699 494 555 -13GBCH 04 803 389 438 617 445 538 -16

50

�� !" #��

FIBRE QUALITY EVALUATION Fibre quality was evaluated in seven locations and data on 2.5 % span length (mm), uniformity ratio, micronaire and bundle strength is furnished in Tables 34 to 37. Most of the hybrids had around 30 mm of fibre length (Table 34). Table 34. 2.5% Span Length (mm) in Set ‘B’ under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Ove

rall

mea

n

Mea

n (I)

Mea

n (R

F)

NCEH- 29 30.6 31.8 33.7 33.1 33.3 33.5 31.5 32.5 32.3 32.8ABCH-1020 29.2 31.6 33.4 33.2 31.6 31.8 30.7 31.6 31.9 31.3KDCHH 9632 BG II 26.5 28.2 30.0 30.5 28.0 26.8 28.1 28.3 28.8 27.6LC (Hybrid Check) 26.9 29.1 29.1 30.5 28.4 26.8 30.0 28.7 28.9 28.4PRCH 504 BG II 31.4 30.2 33.8 33.4 32.6 30.7 31.3 31.9 32.2 31.5NSPL -999 BG II 31.1 31.2 32.4 32.7 30.2 29.1 30.1 31.0 31.8 29.8PCH 105 Bt 2 29.7 32.3 29.9 32.5 29.5 28.4 31.0 30.5 31.1 29.6SBCH 284 27.4 27.1 29.3 29.8 27.3 26.1 26.9 27.7 28.4 26.7UPLHH-12 Bt 28.7 28.1 29.8 31.7 29.8 26.7 28.7 29.1 29.6 28.4KCH-135 Bt II 31.6 32.2 32.7 32.8 32.2 29.0 30.2 31.5 32.3 30.5VCH-602 BG II 29.7 31.6 32.0 34.7 29.8 29.4 30.5 31.1 32.0 29.9113 – 2 Bt 29.2 30.8 33.0 32.2 29.7 28.6 29.3 30.4 31.3 29.2Tulasi 118 BGII 29.6 29.5 32.5 33.6 31.9 29.4 30.0 30.9 31.3 30.4Bunny (Non-Bt check) 32.6 31.6 32.1 33.3 33.2 32.8 31.3 32.4 32.4 32.4GK-205 BG II 27.4 29.3 30.9 30.4 28.1 26.8 29.2 28.9 29.5 28.0VICH 15 Bt 28.1 28.6 29.6 31.8 29.2 27.3 28.0 28.9 29.5 28.2ANKUR-10122 BGII 31.7 32.1 33.8 33.3 31.4 28.2 31.4 31.7 32.7 30.3JKCH-2245 Bt 30.6 31.4 31.6 32.5 32.2 29.8 30.5 31.2 31.5 30.8RCH 2 Bt (Bt check) 29.3 31.2 31.6 33.3 31.6 28.1 29.4 30.6 31.3 29.7ACH 155-2 24.4 29.1 31.1 31.5 27.4 24.7 27.4 27.9 29.0 26.5NCS 207 Bt 2 29.7 32.1 32.5 33.0 30.4 32.4 29.4 31.3 31.8 30.7NAMCOT-607 BG II 27.7 29.3 31.1 30.7 28.9 26.2 28.5 28.9 29.7 27.9SP 1037 B2 28.7 29.6 32.5 31.6 29.8 30.3 28.5 30.1 30.6 29.5GBCH 04 28.0 29.4 31.0 31.4 29.9 28.2 28.6 29.5 30.0 28.9MLCH- 318 BGII 27.7 28.3 32.1 29.6 28.2 25.9 30.5 28.9 29.4 28.2RCH- 596 BGII 30.2 31.8 34.0 34.0 32.4 31.9 27.1 31.6 32.5 30.5

51

�� !" #��

There was not much variation in uniformity ratio between the hybrids tested in the trial Set ‘B’ (Table 35). Table 35. Uniformity Ratio in Set ‘B’ under ETL based protection

EntryW

aran

gal

Sir

ugup

pa

Coi

mba

tore

Sri

villi

puth

r

LAM

Adi

laba

d

Ove

rall

mea

n

Mea

n (I)

Mea

n (R

F)

NCEH- 29 51.0 49.0 51.7 47.0 47.4 48.0 49.0 49.7 47.7ABCH-1020 49.0 49.0 50.3 48.0 48.8 48.0 48.9 49.1 48.4KDCHH 9632 BG II 49.0 48.0 51.3 50.0 50.1 50.0 49.7 49.6 50.1LC (Hybrid Check) 50.0 50.0 52.3 51.0 50.8 50.0 50.7 50.8 50.4PRCH 504 BG II 49.0 51.0 49.3 47.0 48.0 49.0 48.9 49.1 48.5NSPL -999 BG II 51.0 50.0 51.7 50.0 52.6 49.0 50.7 50.7 50.8PCH 105 Bt 2 51.0 49.0 52.0 50.0 50.7 51.0 50.6 50.5 50.8SBCH 284 51.0 51.0 52.0 51.0 51.8 50.0 51.1 51.3 50.9UPLHH-12 Bt 51.0 50.0 51.7 50.0 51.6 51.0 50.9 50.7 51.3KCH-135 Bt II 47.0 47.0 51.0 48.0 47.4 46.0 47.7 48.3 46.7VCH-602 BG II 49.0 47.0 52.3 50.0 48.4 51.0 49.6 49.6 49.7113 – 2 Bt 51.0 49.0 51.3 50.0 51.7 51.0 50.7 50.3 51.3Tulasi 118 BGII 50.0 49.0 51.7 48.0 46.8 50.0 49.2 49.7 48.4Bunny (Non-Bt check) 48.0 48.0 50.0 47.0 49.6 51.0 48.9 48.3 50.3GK-205 BG II 49.0 50.0 52.0 50.0 51.4 50.0 50.4 50.3 50.7VICH 15 Bt 51.0 50.0 53.0 51.0 50.9 49.0 50.8 51.3 50.0ANKUR-10122 BGII 50.0 50.0 51.0 50.0 50.1 47.0 49.7 50.3 48.6JKCH-2245 Bt 48.0 47.0 51.0 49.0 47.6 49.0 48.6 48.8 48.3RCH 2 Bt (Bt check) 49.0 47.0 51.0 48.0 49.6 47.0 48.6 48.8 48.3ACH 155-2 51.0 51.0 51.7 50.0 51.7 51.0 51.1 50.9 51.3NCS 207 Bt 2 48.0 47.0 49.7 49.0 49.3 50.0 48.8 48.4 49.6NAMCOT-607 BG II 47.0 47.0 49.3 48.0 47.7 47.0 47.7 47.8 47.3SP 1037 B2 48.0 49.0 52.0 50.0 50.4 49.0 49.7 49.8 49.7GBCH 04 48.0 50.0 51.3 50.0 49.3 51.0 49.9 49.8 50.2MLCH- 318 BGII 50.0 50.0 52.0 49.0 50.8 51.0 50.5 50.3 50.9RCH- 596 BGII 47.0 51.0 50.7 48.0 49.3 50.0 49.3 49.2 49.6

52

�� !" #��

In trial with Set ‘B’ of hybrids, the micronaire value varied from 3.8 and 4.5 (Table 36).

Table 36. Micronaire (µg/tex) in Set ‘B’ under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Overall mean

Mean (I)

Mean (RF)


53

�� !" #��

The highest bundle strength of 22.9 g/tex was recorded in PCH 105 Bt 2, Ankur 10122 BG II and Bunny (Table 37). The lowest strength was observed in NAMCOT-607 BG II (20.1 g/tex). Eleven test hybrids were found better than Bt check hybrid. Table 37. Bundle Strength (g/tex) in Set ‘B’ under ETL based protection

EntryW

aran

gal

Sir

ugup

pa

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Overall mean

Mean (I)

Mean (RF)


54

�� !" #��

ETL Based Entomological Evaluation Sucking pests Sucking pests like jassids, white fly, thrips and aphids were recorded in different entries of Set ‘B’ on weekly basis and the mean data is furnished in Tables 38 to 41. Test hybrids KDCHH 9632 BG II (2.7) and MLCH 318 BG II (2.5) had lesser incidence of jassids as compared to Bt check (4.2). Table 38. Jassid / plant in Set ‘B’ under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Rai

chur

B'g

udi

Coi

mba

tore

LAM

Dha

rwad Overall

meanMean

(I)Mean (RF)


55

�� !" #��

White fly population per plant in test hybrids viz., NSPL 999 BG II, SP 1037 B2 and GBCH 04 were less (1.0) as compared to RCH 2 Bt (1.6). Table 39. Whitefly / plant in Set ‘B’ under ETL based protection

Entry Warangal Siruguppa Coimbatore LAM Overall mean

Mean (I)

Mean (RF)

NCEH- 29 5.8 0.6 0.0 0.1 1.6 2.1 0.1ABCH-1020 4.4 1.1 0.0 0.2 1.4 1.8 0.2KDCHH 9632 BG II 4.2 1.3 0.1 0.9 1.6 1.9 0.9LC (Hybrid Check) 3.6 1.4 0.0 0.3 1.3 1.7 0.3PRCH 504 BG II 2.8 0.4 0.0 1.0 1.1 1.1 1.0NSPL -999 BG II 3.4 0.3 0.0 0.3 1.0 1.2 0.3PCH 105 Bt 2 4.2 0.5 0.0 0.5 1.3 1.6 0.5SBCH 284 4.2 0.3 0.0 0.5 1.2 1.5 0.5UPLHH-12 Bt 4.4 1.2 0.1 0.4 1.5 1.9 0.4KCH-135 Bt II 3.2 1.2 0.0 0.2 1.1 1.5 0.2VCH-602 BG II 4.6 0.4 0.0 0.3 1.3 1.7 0.3113 – 2 Bt 5.2 0.5 0.0 0.3 1.5 1.9 0.3Tulasi 118 BGII 4.8 0.2 0.0 0.4 1.3 1.7 0.4Bunny (Non-Bt check) 6.6 0.5 0.0 0.1 1.8 2.4 0.1GK-205 BG II 4.6 1.3 0.0 0.6 1.6 2.0 0.6VICH 15 Bt 4.2 0.3 0.0 0.1 1.1 1.5 0.1ANKUR-10122 BGII 3.4 1.1 0.0 0.5 1.2 1.5 0.5JKCH-2245 Bt 3.2 0.4 0.1 0.8 1.1 1.2 0.8RCH 2 Bt (Bt check) 5.4 0.3 0.0 0.5 1.6 1.9 0.5ACH 155-2 6.2 1.3 0.0 0.0 1.9 2.5 0.0NCS 207 Bt 2 4.8 1.1 0.1 0.1 1.5 2.0 0.1NAMCOT-607 BG II 4.4 1.3 0.0 0.6 1.6 1.9 0.6SP 1037 B2 3.2 0.5 0.0 0.4 1.0 1.2 0.4GBCH 04 2.4 1.2 0.0 0.2 1.0 1.2 0.2MLCH- 318 BGII 4.4 0.5 0.0 0.2 1.3 1.6 0.2RCH- 596 BGII 3.6 1.2 0.1 0.1 1.2 1.6 0.1

56

�� !" #��

As far as thrips incidence per plant is concerned, the test hybrid 113-2 Bt registered lesser population (4.5) as compared to Bt check hybrid (7.2). Table 40. Thrips / plant in Set ‘B’ under ETL based protection

EntryW

aran

gal

Sir

ugup

pa

Rai

chur

B'g

udi

Coi

mba

tore

LAM

Dha

rwad Overall

meanMean

(I)Mean (RF)


57

�� !" #��

With regard to number of aphids per plant, the test hybrid SP 1037 B2 have recorded lesser population of 4.5 as against 7.2 noted in RCH 2 Bt. Table 41. Aphid / plant in Set ‘B’ under ETL based protection

Entry B'gudi Coimbatore LAM Dharwad Overall mean

Mean (I)

Mean (RF)


58

�� !" #��

Percent Square damage In general, the percent square damage due to bollworms was considerably low in Bt test hybrids as compared to non-Bt check hybrids, except GBCH 04 and SBCH 284 which recorded higher level of damage (Table 42). Table 42. % Square Damage by Bollworm in Set ‘B’ under ETL based protection

Entry Warangal

Raichur Coimbatore

LAM Dharwad Overall mean

Mean (I)

Mean (RF)

NCEH- 29 0.0 1.5 0.0 0.0 7.7 1.8 0.5 3.8ABCH-1020 0.0 1.0 0.0 0.0 7.7 1.7 0.3 3.9KDCHH 9632 BG II 0.0 2.8 0.5 0.0 2.4 1.1 1.1 1.2LC (Hybrid Check) 1.9 24.7 1.4 0.0 7.1 7.0 9.4 3.5PRCH 504 BG II 0.0 0.3 0.3 0.0 6.7 1.5 0.2 3.4NSPL -999 BG II 0.0 0.5 0.0 0.0 5.2 1.1 0.2 2.6PCH 105 Bt 2 0.0 0.6 0.0 0.0 8.0 1.7 0.2 4.0SBCH 284 0.0 23.7 0.0 0.0 1.7 5.1 7.9 0.9UPLHH-12 Bt 0.0 0.8 0.0 0.0 4.9 1.1 0.3 2.4KCH-135 Bt II 0.0 0.7 0.1 0.0 4.4 1.0 0.3 2.2VCH-602 BG II 0.0 1.6 0.2 0.0 3.6 1.1 0.6 1.8113 – 2 Bt 0.0 1.2 0.0 0.0 4.5 1.1 0.4 2.2Tulasi 118 BGII 0.0 0.6 0.0 0.0 3.3 0.8 0.2 1.7Bunny (Non-Bt check) 0.9 41.3 0.3 0.0 5.9 9.7 14.2 3.0GK-205 BG II 0.0 0.4 0.0 0.0 5.0 1.1 0.1 2.5VICH 15 Bt 0.0 0.3 0.0 0.0 7.6 1.6 0.1 3.8ANKUR-10122 BGII 0.0 1.4 0.0 0.0 9.9 2.3 0.5 5.0JKCH-2245 Bt 3.1 0.2 0.0 0.0 7.8 2.2 1.1 3.9RCH 2 Bt (Bt check) 0.0 1.6 0.0 0.0 8.0 1.9 0.5 4.0ACH 155-2 0.0 0.1 0.0 0.0 7.3 1.5 0.0 3.7NCS 207 Bt 2 0.0 0.5 0.0 0.0 4.3 1.0 0.2 2.1NAMCOT-607 BG II 0.8 1.2 0.0 0.0 5.5 1.5 0.7 2.8SP 1037 B2 1.8 0.8 0.0 0.0 2.9 1.1 0.9 1.5GBCH 04 0.0 19.6 0.0 0.0 6.1 5.1 6.5 3.0MLCH- 318 BGII 2.2 0.4 0.0 0.0 6.5 1.8 0.9 3.2RCH- 596 BGII 0.0 1.0 0.0 0.0 10.6 2.3 0.3 5.3

59

�� !" #��

Pink boll worm damage There was not much variation in pink bollworm damage and number per 20 green bolls (Table 43) and very low incidence was noticed even in non Bt hybrids. Table 43. Pink Bollworm in Set ‘B’ under ETL based protection

Warangal

Coimbatore

LAM Overall mean

B'gudi LAM Overall mean


Damage in green bolls (%)Entry

Larvae / 20 green bolls

60

�� !" #��

Open boll damage

There was not much difference between open boll damage in most of the hybrids (Table 44). High level of damage was recorded in Dharwad and Beemarayangudi, whereas, low level of damage was recorded in other centres. Table 44. Open boll damage (%) in Set ‘B’ under ETL based protection

Sir

ugup

pa

B'g

udi

Coi

mba

tore

LAM Overall

mean

Sir

ugup

pa

B'g

udi

Coi

mba

tore

LAM

Dha

rwad Overall

mean

NCEH- 29 1.9 1.7 0.7 0.0 1.1 4.5 13.7 0.0 0.0 21.7 8.0ABCH-1020 2.4 3.9 0.0 0.0 1.6 2.9 12.9 0.0 0.0 22.6 7.7KDCHH 9632 BG II 4.1 2.4 1.0 0.0 1.9 4.1 11.3 0.0 0.0 15.8 6.2LC (Hybrid Check) 3.5 0.5 1.3 0.0 1.3 3.6 12.0 0.0 0.0 18.8 6.9PRCH 504 BG II 1.4 2.9 0.0 0.0 1.1 3.1 12.1 0.0 0.0 6.5 4.3NSPL -999 BG II 3.1 1.4 0.0 0.0 1.1 11.6 14.5 0.0 0.0 8.6 6.9PCH 105 Bt 2 4.7 3.8 0.0 0.0 2.1 12.3 8.7 0.0 0.0 13.1 6.8SBCH 284 3.7 3.4 1.0 0.0 2.0 12.0 12.6 0.0 0.0 8.3 6.6UPLHH-12 Bt 4.0 2.8 2.0 0.0 2.2 13.5 10.7 0.7 0.0 10.5 7.1KCH-135 Bt II 2.7 2.1 0.3 0.0 1.3 4.6 11.9 0.0 0.0 10.9 5.5VCH-602 BG II 3.1 2.0 0.0 0.0 1.3 3.2 14.1 0.0 0.0 16.2 6.7113 – 2 Bt 1.5 0.9 0.0 0.0 0.6 4.8 8.6 0.0 0.0 17.0 6.1Tulasi 118 BGII 3.7 4.4 0.3 0.0 2.1 11.0 8.7 0.2 0.0 15.9 7.1Bunny (Non-Bt check) 2.1 1.1 0.3 0.0 0.9 10.8 18.4 0.0 0.0 9.6 7.7GK-205 BG II 0.4 0.5 0.0 0.0 0.2 3.3 10.8 0.0 0.0 11.7 5.1VICH 15 Bt 1.6 0.0 0.0 0.0 0.4 4.2 7.8 0.0 0.0 16.8 5.8ANKUR-10122 BGII 2.1 0.9 1.7 0.0 1.2 5.6 10.6 0.0 0.0 14.2 6.1JKCH-2245 Bt 3.4 0.0 0.0 0.0 0.9 4.3 14.7 0.0 0.0 11.2 6.1RCH 2 Bt (Bt check) 1.6 1.9 0.7 0.0 1.0 3.3 12.8 0.0 0.0 17.7 6.8ACH 155-2 1.6 2.3 1.0 0.0 1.2 2.9 8.0 0.0 0.0 18.6 5.9NCS 207 Bt 2 2.1 3.1 1.3 0.0 1.6 8.3 9.3 0.0 0.0 16.8 6.9NAMCOT-607 BG II 1.9 0.0 1.0 0.0 0.7 6.5 9.8 0.0 0.0 17.1 6.7SP 1037 B2 3.9 2.4 0.0 0.0 1.6 9.5 7.4 0.0 0.0 11.4 5.7GBCH 04 2.6 5.1 0.7 0.0 2.1 2.8 8.0 0.0 0.0 17.5 5.7MLCH- 318 BGII 1.5 1.6 1.0 0.0 1.0 2.9 15.9 0.0 0.0 19.8 7.7RCH- 596 BGII 3.0 0.0 0.3 0.0 0.8 3.2 12.6 0.0 0.0 24.5 8.1

Open boll damage (%)

Entry

Locule damage (%)

61

�� !" #��

EVALUATION UNDER UNPROTECTED CONDITIONS

Germination and Plant Stand Under unprotected conditions, poor germination and plant stand at harvest was noticed in NCEH 29 and lack of germination was reported in GK 205 BG II was reported at Coimbatore (Table 45). In other entries, satisfactory germination and plant stand was recorded. Table 45. Germination and Plant Stand under Unprotected condition in Set ‘B’

Coimbatore

Srivilliputhr

LAM Overall mean

Coimbatore

LAM Overall mean


Germination (%) Plant StandEntry

62

�� !" #��

Open boll damage

The non Bt check hybrids recorded the highest open boll damage in both boll basis and locule basis (Table 46). Table 46. Open Boll Damage under Unprotected condition in Set ‘B’

Coi

mba

tore

Sri

villi

puth

r

LAM

Aru

ppuk

otta

i

Overall mean

Coi

mba

tore

Sri

villi

puth

r

LAM

Dha

rwad

Aru

ppuk

otta

i

Overall mean

NCEH- 29 1.0 10.2 0.0 5.1 4.1 0.0 8.8 0.0 21.4 4.7 7.0ABCH-1020 0.0 18.9 0.0 5.2 6.0 0.0 6.6 0.0 19.1 4.8 6.1KDCHH 9632 BG II 0.0 23.6 0.0 3.4 6.7 0.0 11.3 0.0 8.8 3.0 4.6LC (Hybrid Check) 0.0 33.3 0.0 5.3 9.6 1.0 11.8 0.0 17.8 4.8 7.1PRCH 504 BG II 0.0 10.8 0.0 3.3 3.5 0.0 7.7 0.0 3.8 2.9 2.9NSPL -999 BG II 0.0 27.0 0.0 2.4 7.4 0.0 15.0 0.0 9.3 2.0 5.3PCH 105 Bt 2 0.0 20.9 0.0 6.5 6.8 0.0 18.8 0.0 4.7 6.0 5.9SBCH 284 0.5 27.4 0.0 4.9 8.2 0.0 16.3 0.0 7.8 4.5 5.7UPLHH-12 Bt 0.0 14.4 0.0 4.2 4.7 0.0 7.5 0.0 9.3 3.8 4.1KCH-135 Bt II 1.0 14.6 0.0 3.8 4.8 0.5 7.5 0.0 15.0 3.5 5.3VCH-602 BG II 0.0 16.3 0.0 5.1 5.3 0.0 6.3 0.0 6.7 4.7 3.5113 – 2 Bt 0.0 10.7 0.0 3.8 3.6 0.0 8.8 0.0 11.2 3.4 4.7Tulasi 118 BGII 1.5 12.9 0.0 2.7 4.3 0.0 6.4 0.0 6.9 2.4 3.1Bunny (Non-Bt check) 1.0 25.1 0.0 10.7 9.2 0.5 16.3 0.0 18.2 10.2 9.0GK-205 BG II 0.0 12.1 0.0 3.8 4.0 0.0 7.9 0.0 3.9 3.3 3.0VICH 15 Bt 0.0 14.6 0.0 4.0 4.6 0.0 5.1 0.0 18.9 3.6 5.5ANKUR-10122 BGII 0.0 9.7 0.0 3.5 3.3 0.0 7.7 0.0 5.4 3.0 3.2JKCH-2245 Bt 1.5 12.3 0.0 4.6 4.6 0.0 5.2 0.0 8.4 4.2 3.6RCH 2 Bt (Bt check) 0.0 12.1 0.0 4.7 4.2 0.0 6.3 0.0 7.1 4.2 3.5ACH 155-2 0.0 12.2 0.0 2.2 3.6 0.0 10.3 0.0 9.6 1.9 4.4NCS 207 Bt 2 0.0 10.4 0.0 2.8 3.3 0.0 7.8 0.0 5.1 2.5 3.1NAMCOT-607 BG II 0.0 14.4 0.0 5.2 4.9 0.0 8.8 0.0 8.7 4.8 4.4SP 1037 B2 0.0 11.9 0.0 1.8 3.4 0.0 7.7 0.0 8.8 1.4 3.6GBCH 04 0.0 13.3 0.0 4.2 4.4 0.5 10.1 0.0 6.8 3.6 4.2MLCH- 318 BGII 0.0 13.3 0.0 4.6 4.5 0.0 8.8 0.0 6.6 4.2 3.9RCH- 596 BGII 0.0 13.4 0.0 4.5 4.5 0.0 8.8 0.0 8.3 4.0 4.2

Entry

Open boll damage (%) Locule damage (%)

63

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Under unprotected conditions, seed cotton yield was recorded in Coimbatore and Srivilliputhur in irrigated situation and the data is furnished in Table 47. The highest seed cotton yield of 2305 kg/ha was reported in UPLHH 12 Bt with 50 % yield increase over RCH 2 Bt. Table 47. Seed cotton yield (kg/ha) in irrigated locations under unprotected

conditions in Set ‘B’


UPLHH-12 Bt 1204 3405 2305 50PRCH 504 BG II 1281 2729 2005 30KDCHH 9632 BG II 1096 2600 1848 20JKCH-2245 Bt 941 2676 1809 17Tulasi 118 BGII 849 2738 1794 16PCH 105 Bt 2 833 2478 1656 7VICH 15 Bt 1049 2244 1647 6ABCH-1020 648 2486 1567 1RCH 2 Bt (Bt check) 648 2451 1550 0NCS 207 Bt 2 941 2148 1545 0NSPL -999 BG II 802 2279 1541 -1ANKUR-10122 BGII 694 2313 1504 -3MLCH- 318 BGII 895 2045 1470 -5GK-205 BG II 1464 1464 -6Bunny (Non-Bt check) 833 2061 1447 -7ACH 155-2 772 2070 1421 -9VCH-602 BG II 895 1938 1417 -9KCH-135 Bt II 787 2036 1412 -9GBCH 04 525 2295 1410 -9NAMCOT-607 BG II 602 2166 1384 -11LC (Hybrid Check) 1003 1724 1364 -12RCH- 596 BGII 648 2054 1351 -13SP 1037 B2 772 1776 1274 -18113 – 2 Bt 679 1854 1267 -19SBCH 284 525 1941 1233 -21NCEH- 29 355 2097 1226 -22CD @ 5%CV %

64

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Yield data was recorded in Lam and Aruppukottai and the data is furnished in Table 48. The highest yield was noted in ACH 155-2 (1954 kg/ha) with 78 yield increase over RCH 2 Bt (1095 kg/ha). Table 48. Seed cotton yield (kg/ha) in rainfed locations under unprotected

conditions in Set ‘B’

Entry LAM Aruppukottai Mean (RF) % Inc. over RCH 2 Bt

ACH 155-2 1811 2096 1954 78VICH 15 Bt 1686 1776 1731 58KDCHH 9632 BG II 1441 1769 1605 47NSPL -999 BG II 1247 1773 1510 38LC (Hybrid Check) 1547 1462 1505 37JKCH-2245 Bt 1806 986 1396 27KCH-135 Bt II 1455 1272 1364 25NAMCOT-607 BG II 1570 1053 1312 20MLCH- 318 BGII 1649 933 1291 18NCS 207 Bt 2 1478 1087 1283 17PRCH 504 BG II 1570 969 1270 16Tulasi 118 BGII 1071 1443 1257 15ANKUR-10122 BGII 1626 885 1256 15UPLHH-12 Bt 1325 1176 1251 14ABCH-1020 535 1831 1183 8RCH- 596 BGII 1048 1239 1144 4RCH 2 Bt (Bt check) 910 1280 1095 0NCEH- 29 646 1531 1089 -1113 – 2 Bt 877 1287 1082 -1SP 1037 B2 1187 856 1022 -7GBCH 04 632 1399 1016 -7GK-205 BG II 900 1050 975 -11PCH 105 Bt 2 1002 871 937 -14Bunny (Non-Bt check) 401 1391 896 -18VCH-602 BG II 646 1097 872 -20SBCH 284 609 999 804 -27

65

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PATHOLOGICAL EVALUATION The pathological observations like incidence of major diseases Bacterial leaf blight, alternaria leaf spot, grey mildew, myrothecium leaf spot and other diseases like Helminthosporium leaf spot, Colletotrichum boll rot were recorded under natural conditions and are presented centre-wise.

Lam, Guntur: In general, bacterial blight and grey mildew were the diseases that were noticed in the test and check hybrids. Most of the test hybrids recorded moderate incidence of the diseases with the few like SBCH 284, UPLHH 12 recording lesser incidence of the diseases.

Warangal: Mild incidence of bacterial blight and grey mildew were noticed with Bt and non Bt hybrids recording equally less level of incidence. However, Colletotrichum boll rot could be noticed at less than ten per cent in bolls of both Bt and non Bt hybrids. Similarly, mild incidence of Tobacco Streak Virus with chlorotic mottles could be noticed in both Bt and non Bt hybrids.

Coimbatore: No incidence of Alternaria leaf spot, bacterial blight or grey mildew could be noticed among the Bt hybrids tested. However, very less incidence of seedling rot could be seen with incidence grade being one in most of the hybrids with appearance showing 30 days after sowing in all test and check hybrids.

Srivilliputhur: Initiation of bacterial blight disease was noticed in infestor row of susceptible check, while mild incidence with grade I being noticed in certain test hybrids and check hybrids from 90 days after sowing stage. Most of the test hybrids did not show any disease symptom due to Myrothecium leaf spot, while very few hybrids like KDCHH 9632 BG II, Tulasi 118 BG II, NAMCOT 607 BG II, SP 1037 B2, MLCH 318 BG II and local check registered lower incidence at later stages of growth.

Aruppukottai: None of the test entries showed the incidence of bacterial leaf blight, grey mildew and Cercospora leaf spot upto 45 days after sowing. Lower level of disease incidence of Cercospora and grey mildew was noticed after 120 days after sowing in most of the hybrids including check hybrids with test entries like VICH 15 Bt, MLCH 318 BG II, RCH 596 BG II recording very less disease incidence.

Beemarayangudi: Alternaria leaf spot, bacterial blight and rust were noticed only during later stages of growth with both Bt test hybrids and check hybrids reporting similar levels of grade of infection. Leaf reddening has also been observed in most of the Bt test hybrids at 150 days after sowing stage.

66

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SECOND YEAR TRIALS (2007-08) INTRA HIRSUTUM HYBRID TRIAL

In continuation of previous year (2006-07) trial evaluation of intra-hirsutum Bt cotton hybrids, second year evaluation of test hybrids (submitted for evaluation by AICCIP) was carried out. The following list shows the details of the hybrids submitted by firms for second year evaluation.

S. No. Name of the Hybrid Name of the Company 1. Akka BG II Ankur Seeds Pvt. Limited 2. Ankur Jai Bt Ankur Seeds Pvt. Limited 3. BCHH 322-2 BG II Bioseed India Research Pvt. Limited 4. Brahma BG II Emergent Genetics India Pvt. Ltd 5. JK Gowri Bt (ET 1) JK Agri Genetics Limited 6. KDCHH 441 BG II Krishidhan Seeds 7. NCEH 13 Bt (FG) Nath Seeds 8. Tulasi 9 BG II Tulasi Seeds Pvt. Limited

The evaluation trial was carried out as per standard established procedure adopted for evaluation of Bt test hybrids in earlier years like inclusion of Bt and non-Bt check hybrids besides local check hybrid, ETL based plant protection and other entomological and pathological observations etc. The data received from evaluation centres have been compiled and presented below.

In general, germination percentage and plant stand at harvest were comparable to check hybrids (Table 49).

Table 49. Germination (%) and Plant Stand under ETL based protection

Coimbatore

Aruppukottai

Overall mean

B'gudi Coimbatore

LAM Overall mean

JK Gowri Bt (ET 1) 84.4 94.0 89.2 43.7 38.3 58.7 46.9Akka BG II 88.3 98.0 93.2 47.7 50.0 56.3 51.3Bunny (Non-Bt check) 89.4 98.0 93.7 45.7 37.0 58.7 47.1KDCHH 441 BG II 92.2 100.0 96.1 44.7 50.3 57.7 50.9Ankur Jai Bt 92.8 99.0 95.9 48.3 53.0 59.3 53.6RCH 2 Bt (Bt check) 93.3 100.0 96.7 46.7 39.3 58.0 48.0NCEH 13 Bt (FG) 86.1 100.0 93.1 48.7 44.0 58.0 50.2Tulasi 9 BG II 88.9 98.0 93.4 45.7 47.0 59.3 50.7Brahma BG II 86.1 94.0 90.1 43.3 43.0 58.7 48.3LC (Hybrid Check) 83.3 98.0 90.7 47.0 42.7 57.0 48.9BCHH 322-2 BG II 86.7 96.0 91.3 43.0 51.3 59.3 51.2

Germination %Entry

Stand at harvest (number of plants)

67

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The overall mean boll weight in test hybrids was higher than the Bt check hybrid with the mean boll weight being more in irrigated conditions as compared to rainfed conditions (Table 50).

Table 50. Boll weight (g) under ETL based protection

EntryW

aran

gal

Sir

ugup

pa

Rai

chur

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Dha

rwad

Aru

ppuk

otta

i

Overall mean

Mean (I)

Mean (RF)

JK Gowri Bt (ET 1) 4.4 5.4 4.8 5.9 5.0 4.6 3.9 4.5 5.6 4.1 4.8 5.1 4.5Akka BG II 4.8 5.3 4.9 6.9 5.3 5.0 3.8 4.9 6.0 3.7 5.1 5.5 4.7Bunny (Non-Bt check) 4.6 5.6 4.9 6.2 5.8 5.4 3.7 5.0 5.6 3.8 5.0 5.4 4.7KDCHH 441 BG II 4.5 5.4 6.0 6.4 6.1 5.5 3.9 4.7 5.8 4.0 5.2 5.7 4.8Ankur Jai Bt 4.5 6.0 6.3 6.9 6.2 4.7 3.9 4.4 6.1 3.6 5.3 6.0 4.5RCH 2 Bt (Bt check) 3.9 5.4 4.6 6.6 4.6 4.8 3.7 4.0 4.7 3.5 4.6 5.0 4.1NCEH 13 Bt (FG) 4.1 5.7 5.4 5.9 4.0 5.4 3.8 4.9 5.1 3.8 4.8 5.0 4.6Tulasi 9 BG II 4.7 6.1 5.6 6.8 6.0 5.3 4.3 5.0 5.9 4.1 5.4 5.8 4.9Brahma BG II 5.6 6.6 5.8 6.9 6.2 5.5 3.7 5.4 6.4 3.6 5.6 6.2 4.9LC (Hybrid Check) 4.0 5.0 4.5 6.0 5.4 5.3 3.5 4.6 5.5 3.6 4.7 5.0 4.5BCHH 322-2 BG II 5.1 6.1 4.8 6.4 6.1 4.0 4.1 5.2 5.6 3.6 5.1 5.7 4.5 The mean ginning outturn ranged between 32.9 and 37.0 % with Tulasi 9 BG II and NCEH 13 Bt (FG) registering higher values in many locations (Table 51).

Table 51. Ginning outturn under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Rai

chur

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Dha

rwad

Aru

ppuk

otta

i

Overall mean

Mean (I)

Mean (RF)

JK Gowri Bt (ET 1) 33.3 32.4 34.0 33.4 37.3 34.7 34.0 32.0 37.7 36.5 34.5 34.1 35.0Akka BG II 35.7 30.8 35.0 33.3 37.0 34.9 31.0 36.0 35.3 35.3 34.4 34.3 34.5Bunny (Non-Bt check) 33.7 32.4 37.0 31.5 35.5 34.4 38.0 34.0 37.0 38.8 35.2 34.0 36.4KDCHH 441 BG II 30.4 30.3 35.0 33.2 34.5 35.8 30.0 27.0 34.6 38.5 32.9 32.7 33.2Ankur Jai Bt 32.5 33.9 37.0 34.5 37.8 35.1 33.0 33.0 36.4 37.1 35.0 35.1 34.9RCH 2 Bt (Bt check) 35.1 31.6 38.0 33.8 37.3 35.2 32.0 35.0 35.7 36.1 35.0 35.2 34.8NCEH 13 Bt (FG) 38.9 31.1 39.2 33.2 37.7 35.2 34.0 40.0 39.4 32.8 36.1 36.0 36.3Tulasi 9 BG II 37.5 34.3 39.0 35.3 36.6 36.0 32.0 38.0 42.0 38.9 37.0 36.5 37.4Brahma BG II 33.5 32.8 37.0 36.3 37.6 35.9 37.0 33.0 36.7 36.3 35.6 35.4 35.8LC (Hybrid Check) 34.2 37.4 36.0 38.1 39.2 35.2 32.0 34.0 38.8 36.1 36.1 37.0 35.2BCHH 322-2 BG II 34.3 32.9 36.0 35.1 38.2 34.9 32.0 34.0 38.0 36.8 35.2 35.3 35.1

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The mean lint index varied between 5.6 and 6.7 under irrigated conditions, while it was from 5.7 to 6.5 under rainfed situations (Table 52).

Table 52. Lint Index (g) under ETL based protection

EntryW

aran

gal

Sir

ugup

pa

Rai

chur

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Dha

rwad

Aru

ppuk

otta

i

Overall mean

Mean (I)

Mean (RF)


The mean seed index ranged between 10.7 and 12.6 g under irrigated conditions, while it was from 10.1 to 11.8 g in rainfed location (Table 53).

Table 53. Seed Index (g) under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Rai

chur

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Dha

rwad

Aru

ppuk

otta

i

Overall mean

Mean (I)

Mean (RF)


69

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The mean seed cotton yield registered by test hybrids under ETL based plant protection is furnished in Tables 54 and 55. Under irrigated conditions, six hybrids were found superior to Bt check hybrid with 4 to 20 % yield increase and the highest seed cotton yield was recorded in BCHH 322-2 BG II (2854 kg/ha).

Table 54. Mean seed cotton yield under irrigated conditions under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Rai

chur

B'g

udi

Coi

mba

tore

Sri

villi

puth

r

Mean (I)% Inc

over RCH 2 Bt

BCHH 322-2 BG II 2155 3475 3038 2454 2969 3032 2854 20Ankur Jai Bt 2067 3315 3221 1868 2969 2924 2727 14KDCHH 441 BG II 1550 3028 3513 2117 2586 3230 2671 12Tulasi 9 BG II 1626 2628 3853 1282 3018 3321 2621 10Akka BG II 1781 3329 2929 1265 2996 3011 2552 7Brahma BG II 1527 2953 3192 1818 3099 2337 2488 4RCH 2 Bt (Bt check) 1946 2143 3395 1094 2825 2906 2385 0LC (Hybrid Check) 1897 2362 1549 2049 1901 2091 1975 -17NCEH 13 Bt (FG) 1501 2687 2879 757 1981 1983 1965 -18JK Gowri Bt (ET 1) 1510 2444 2646 836 1753 1586 1796 -25Bunny (Non-Bt check) 1946 2337 1237 1389 1525 2163 1766 -26CD @ 5% 473 547 510 227CV % 16 12 12 5 Under rainfed situations, all the test hybrids except NCEH 13 Bt (FG) registered higher yield over Bt check hybrid RCH 2 Bt (1898 kg/ha) as furnished in Table 55.

Table 55. Mean seed cotton yield under rainfed conditions under ETL based protection

Entry

LAM

Nan

dyal

Adi

laba

d

Dha

rwad

Aru

ppuk

otta

i

Mean (RF)

% Inc. over

RCH 2 Bt

KDCHH 441 BG II 3428 2429 1843 2205 2011 2383 26Tulasi 9 BG II 3276 2209 1957 2133 2067 2328 23JK Gowri Bt (ET 1) 3102 2476 1709 2264 1764 2263 19Ankur Jai Bt 2635 2106 1926 2316 1970 2191 15Brahma BG II 3320 2211 1977 1900 1311 2144 13Akka BG II 2728 2066 2080 2226 1466 2113 11BCHH 322-2 BG II 2598 2075 2142 1617 1319 1950 3RCH 2 Bt (Bt check) 2649 2307 1740 1448 1346 1898 0LC (Hybrid Check) 2967 1193 1741 1646 1501 1810 -5NCEH 13 Bt (FG) 2490 2046 1730 1248 1359 1775 -6Bunny (Non-Bt check) 3181 931 1967 1231 1430 1748 -8CD @ 5% 258 709 303 595 122CV % 5 7 10 19 5

70

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As compared to lint yield of Bt check hybrid RCH 2 Bt (936 kg/ha), four hybrids exhibited higher lint yield to a tune of 3 to 13 % under irrigated condition (Table 56).

Table 56. Mean lint yield (kg/ha) in irrigated centres under ETL based protection

EntryW

aran

gal

Sir

ugup

pa

Rai

chur

Coi

mba

tore

Sri

villi

puth

r

Mean (I)% Inc.

over RCH 2 Bt

Tulasi 9 BG II 610 901 1503 1070 1217 1060 13BCHH 322-2 BG II 739 1144 1094 1040 1157 1035 11Ankur Jai Bt 672 1122 1192 1024 1105 1023 9Akka BG II 636 1022 1025 1000 1115 960 3RCH 2 Bt (Bt check) 683 675 1290 951 1082 936 0Brahma BG II 512 967 1181 1125 877 932 0KDCHH 441 BG II 471 917 1230 858 1113 918 -2NCEH 13 Bt (FG) 584 839 1129 661 750 792 -15LC (Hybrid Check) 649 883 558 725 818 726 -22JK Gowri Bt (ET 1) 503 791 900 585 591 674 -28Bunny (Non-Bt check) 656 762 458 481 766 624 -33 Under rainfed situation, all the test hybrids except NECH 13 Bt (FG) produced higher lint yield than the Bt check hybrid (Table 57).

Table 57. Mean lint yield (kg/ha) in rainfed centres under ETL based protection

Entry

LAM

Nan

dyal

Adi

laba

d

Dha

rwad

Aru

ppuk

otta

i

Mean (RF)

% Inc. over RCH

2 Bt

Tulasi 9 BG II 1180 707 743 896 804 866 32KDCHH 441 BG II 1227 729 497 763 773 798 22JK Gowri Bt (ET 1) 1076 842 546 853 643 792 21Brahma BG II 1190 818 652 698 476 767 17Ankur Jai Bt 924 695 635 844 730 766 17Akka BG II 953 640 748 785 517 729 11BCHH 322-2 BG II 906 664 727 615 486 680 4RCH 2 Bt (Bt check) 932 738 608 517 486 656 0NCEH 13 Bt (FG) 878 696 691 491 445 640 -2LC (Hybrid Check) 1045 382 574 639 542 636 -3Bunny (Non-Bt check) 1093 354 668 455 555 625 -5

71

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Fibre quality Fibre quality attributes did not reveal any major variation in test hybrids as compared to Bt check hybrid, except that of NCEH 13 Bt (FG) which recorded lower micronaire value especially under rainfed conditions and JK Gowri Bt (ET 1) registered noticeably higher micronaire value under irrigated conditions (Tables 58 – 61).

Table 58. 2.5% Span Length (mm) under ETL based protection

Entry

Sir

ugup

pa

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Overall mean

Mean (I)

Mean (RF)

JK Gowri Bt (ET 1) 27.8 28.1 28.6 26.8 28.6 29.1 28.2 28.2 28.1Akka BG II 33.3 32.9 35.8 33.2 30.9 32.9 33.2 34.0 32.3Bunny (Non-Bt check) 32.1 32.9 32.3 32.0 31.8 31.5 32.1 32.4 31.8KDCHH 441 BG II 28.6 29.0 30.3 28.2 28.9 27.7 28.8 29.3 28.3Ankur Jai Bt 31.2 33.3 32.7 32.6 30.9 29.7 31.7 32.4 31.1RCH 2 Bt (Bt check) 30.5 32.1 32.2 30.7 28.3 28.3 30.3 31.6 29.1NCEH 13 Bt (FG) 30.8 32.3 31.7 31.8 30.9 30.0 31.2 31.6 30.9Tulasi 9 BG II 30.3 32.9 32.1 30.4 28.6 29.1 30.6 31.8 29.4Brahma BG II 31.5 33.3 32.0 30.0 31.1 33.0 31.8 32.3 31.4LC (Hybrid Check) 28.2 28.8 29.4 30.0 27.0 28.4 28.6 28.8 28.5BCHH 322-2 BG II 31.8 30.5 32.7 30.6 28.6 30.1 30.7 31.7 29.8 Table 59. Uniformity Ratio under ETL based protection

Entry

Sir

ugup

pa

Coi

mba

tore

Sri

villi

puth

r

LAM

Adi

laba

d

Overall mean

Mean (I)

Mean (RF)

JK Gowri Bt (ET 1) 51.0 52.3 52.0 50.8 49.0 51.0 51.8 49.9Akka BG II 49.0 48.7 47.0 45.8 50.0 48.1 48.2 47.9Bunny (Non-Bt check) 49.0 48.7 48.0 47.0 46.0 47.7 48.6 46.5KDCHH 441 BG II 48.0 51.3 50.0 49.0 50.0 49.7 49.8 49.5Ankur Jai Bt 47.0 49.3 48.0 48.4 49.0 48.4 48.1 48.7RCH 2 Bt (Bt check) 49.0 52.3 49.0 48.8 49.0 49.6 50.1 48.9NCEH 13 Bt (FG) 50.0 51.7 49.0 49.5 50.0 50.0 50.2 49.7Tulasi 9 BG II 50.0 49.0 47.0 49.7 49.0 48.9 48.7 49.3Brahma BG II 49.0 49.7 49.0 49.5 50.0 49.4 49.2 49.7LC (Hybrid Check) 50.0 52.3 52.0 49.9 51.0 51.0 51.4 50.5BCHH 322-2 BG II 50.0 51.0 48.0 48.7 50.0 49.5 49.7 49.3

72

�� !" #��

Table 60. Micronaire (µg/tex) under ETL based protection

Entry

Sir

ugup

pa

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Overall mean

Mean (I)

Mean (RF)

JK Gowri Bt (ET 1) 5.0 5.2 5.4 4.8 4.8 4.0 4.9 5.2 4.5Akka BG II 4.3 4.6 4.4 4.0 4.3 4.2 4.3 4.4 4.2Bunny (Non-Bt check) 4.2 4.7 4.6 4.1 4.5 3.7 4.3 4.5 4.1KDCHH 441 BG II 4.3 4.4 5.1 4.9 4.5 3.8 4.5 4.6 4.4Ankur Jai Bt 4.3 5.0 4.8 4.3 4.4 3.5 4.4 4.7 4.1RCH 2 Bt (Bt check) 4.5 4.8 4.6 4.5 4.4 4.0 4.5 4.6 4.3NCEH 13 Bt (FG) 4.3 4.3 4.6 3.6 3.6 3.8 4.0 4.4 3.7Tulasi 9 BG II 4.6 4.3 4.6 4.4 4.3 4.0 4.4 4.5 4.3Brahma BG II 4.3 4.3 4.3 4.2 4.5 3.9 4.3 4.3 4.2LC (Hybrid Check) 4.5 5.0 4.9 4.3 4.4 4.3 4.6 4.8 4.4BCHH 322-2 BG II 4.4 4.6 4.4 4.1 4.2 4.2 4.3 4.5 4.2 Table 61. Bundle Strength (g/tex) under ETL based protection

Entry

Sir

ugup

pa

Coi

mba

tore

Sri

villi

puth

r

LAM

Nan

dyal

Adi

laba

d

Overall mean

Mean (I)

Mean (RF)

JK Gowri Bt (ET 1) 20.8 20.0 19.5 22.6 20.3 20.8 20.7 20.1 21.2Akka BG II 23.5 21.6 23.6 23.9 22.3 22.1 22.8 22.9 22.8Bunny (Non-Bt check) 22.7 22.2 21.8 23.3 21.1 21.5 22.1 22.2 22.0KDCHH 441 BG II 21.4 20.1 20.1 21.9 22.8 20.5 21.1 20.5 21.7Ankur Jai Bt 22.7 20.9 23.1 23.8 21.7 22.3 22.4 22.2 22.6RCH 2 Bt (Bt check) 22.2 21.2 19.9 21.6 23.0 21.4 21.5 21.1 22.0NCEH 13 Bt (FG) 23.1 22.5 22.9 24.0 23.4 21.9 23.0 22.8 23.1Tulasi 9 BG II 22.2 19.8 22.5 23.4 21.1 22.7 22.0 21.5 22.4Brahma BG II 22.4 21.0 22.8 22.9 22.5 23.4 22.5 22.1 22.9LC (Hybrid Check) 21.5 20.7 22.3 23.3 21.3 21.6 21.8 21.5 22.1BCHH 322-2 BG II 22.3 21.2 21.3 23.2 22.3 22.3 22.1 21.6 22.6

73

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ENTOMOLOGICAL EVALUATION EVALUATION UNDER ETL BASED PLANT PROTECTION

Weekly observations were recorded on sucking pest incidences and the mean data on Jassids (Table 62), whitefly (Table 63), Thrips (Table 64) and Aphids (Table 65) did not exhibit much variation between incidence on Bt hybrids and Non Bt check hybrids.

Table 62. Jassid / plant under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Rai

chur

B'g

udi

Coi

mba

tore

LAM

Dha

rwad Overall

meanMean

(I)Mean (RF)

JK Gowri Bt (ET 1) 3.4 6.4 9.9 3.4 1.6 8.4 3.2 5.2 4.9 5.8Akka BG II 5.6 4.1 9.1 2.4 1.7 2.7 4.4 4.3 4.6 3.5Bunny (Non-Bt check) 4.4 6.6 11.4 2.9 1.4 2.1 2.1 4.4 5.4 2.1KDCHH 441 BG II 4.6 4.5 18.3 0.9 1.8 2.1 2.3 4.9 6.0 2.2Ankur Jai Bt 10.4 4.5 18.8 1.1 1.6 4.7 2.5 6.2 7.3 3.6RCH 2 Bt (Bt check) 5.6 6.3 18.0 5.4 1.8 6.0 2.9 6.6 7.4 4.5NCEH 13 Bt (FG) 3.2 6.5 14.9 1.9 1.4 2.5 2.9 4.8 5.6 2.7Tulasi 9 BG II 4.4 6.3 14.7 3.2 1.7 4.0 3.0 5.3 6.1 3.5Brahma BG II 3.2 4.1 14.2 3.2 1.6 3.2 3.1 4.7 5.3 3.2LC (Hybrid Check) 5.8 6.8 16.2 3.3 2.2 1.9 4.6 5.8 6.9 3.3BCHH 322-2 BG II 4.4 4.3 11.2 2.4 1.8 2.1 3.1 4.2 4.8 2.6 Table 63. Whitefly / plant under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Coi

mba

tore

LAM Overall

meanMean

(I)Mean (RF)


74

�� !" #��

Table 64. Thrips / plant under ETL based protection

Entry

War

anga

l

Sir

ugup

pa

Rai

chur

B'g

udi

Coi

mba

tore

LAM

Dha

rwad Overall

meanMean

(I)Mean (RF)

JK Gowri Bt (ET 1) 14.2 3.3 1.7 9.2 0.1 1.4 6.5 5.2 5.7 3.9Akka BG II 32.6 2.9 0.7 16.3 0.0 1.9 8.4 9.0 10.5 5.2Bunny (Non-Bt check) 28.4 2.9 2.1 12.1 0.1 2.3 9.6 8.2 9.1 5.9KDCHH 441 BG II 14.8 4.2 1.7 21.6 0.2 1.7 7.3 7.3 8.5 4.5Ankur Jai Bt 20.4 2.3 0.6 23.5 0.0 1.7 11.9 8.6 9.3 6.8RCH 2 Bt (Bt check) 18.2 4.9 1.7 6.0 0.0 1.7 6.7 5.6 6.2 4.2NCEH 13 Bt (FG) 12.6 3.3 1.2 3.9 0.3 3.5 9.3 4.9 4.3 6.4Tulasi 9 BG II 8.4 2.7 2.7 6.9 0.1 2.7 8.5 4.6 4.1 5.6Brahma BG II 18.8 3.1 2.0 12.6 0.0 2.4 12.6 7.4 7.3 7.5LC (Hybrid Check) 22.4 4.5 0.9 14.1 0.1 2.5 12.6 8.1 8.4 7.5BCHH 322-2 BG II 18.2 3.3 1.2 16.9 0.1 2.6 9.7 7.4 7.9 6.1 Table 65. Aphid / plant under ETL based protection

Entry

B'g

udi

Coi

mba

tore

LAM

Dha

rwad Overall

meanMean

(I)Mean (RF)


75

�� !" #��

As regards square damage by bollworms, there was higher damage in non-Bt hybrids as compared to Bt test hybrids under irrigated conditions (Table 66). Under rainfed conditions, higher level of square damage was reported at Dharwad uniformly in all the hybrids. However, at Lam, there was no damage to squares observed.

Table 66. % Square Damage by Bollworm under ETL based protection

EntryW

aran

gal

Rai

chur

Coi

mba

tore

LAM

Dha

rwad Overall

meanMean

(I)Mean (RF)

JK Gowri Bt (ET 1) 0.0 0.0 0.0 0.0 17.1 3.4 0.0 8.6Akka BG II 0.0 0.7 0.0 0.0 16.0 3.3 0.2 8.0Bunny (Non-Bt check) 5.3 24.3 0.9 0.0 14.5 9.0 10.2 7.3KDCHH 441 BG II 0.0 0.0 0.3 0.0 15.2 3.1 0.1 7.6Ankur Jai Bt 0.0 0.3 0.0 0.0 22.7 4.6 0.1 11.3RCH 2 Bt (Bt check) 0.0 0.0 0.4 0.0 15.6 3.2 0.1 7.8NCEH 13 Bt (FG) 0.0 0.0 0.0 0.0 17.0 3.4 0.0 8.5Tulasi 9 BG II 2.1 0.3 0.6 0.0 10.1 2.6 1.0 5.1Brahma BG II 0.0 0.2 0.0 0.0 18.3 3.7 0.1 9.2LC (Hybrid Check) 2.5 26.3 0.0 0.0 14.5 8.6 9.6 7.2BCHH 322-2 BG II 0.0 0.0 0.0 0.0 11.5 2.3 0.0 5.7 Pink Bollworm under ETL based protection

No incidence of pink bollworm was reported at Coimbatore and Lam where the data was recorded in green bolls.

Open boll damage

Very less damage to open boll on both boll as well as locule basis by bollworms was reported at Coimbatore and Lam (Table 67). However, at Siruguppa, Beemarayangudi and at Dharwad, higher damage was reported.

Table 67. Open boll damage (%) under ETL based protection

Sir

ugup

pa

B'g

udi

Coi

mba

tore

LAM Overall

mean

Sir

ugup

pa

B'g

udi

Coi

mba

tore

LAM

Dha

rwad Overall

mean

JK Gowri Bt (ET 1) 14.1 7.2 0.0 0.0 5.3 7.0 10.1 0.0 0.0 10.6 5.5Akka BG II 7.2 2.7 0.0 0.0 2.5 2.7 12.6 0.0 0.0 10.4 5.1Bunny (Non-Bt check) 12.0 3.2 0.5 0.0 3.9 3.3 11.8 0.0 0.0 18.1 6.6KDCHH 441 BG II 8.0 1.7 0.0 0.0 2.4 10.3 12.0 0.0 0.0 15.2 7.5Ankur Jai Bt 7.4 5.3 0.7 0.0 3.3 3.2 12.2 0.0 0.0 16.2 6.3RCH 2 Bt (Bt check) 8.4 4.7 0.0 0.0 3.3 5.5 13.4 0.0 0.0 17.3 7.2NCEH 13 Bt (FG) 12.9 3.8 0.0 0.0 4.2 9.3 9.6 0.0 0.0 14.4 6.7Tulasi 9 BG II 11.8 5.5 0.2 0.0 4.4 3.7 11.0 0.0 0.0 17.0 6.3Brahma BG II 8.2 4.7 0.0 0.0 3.2 5.6 11.9 0.0 0.0 23.1 8.1LC (Hybrid Check) 12.5 6.9 0.5 0.0 5.0 5.5 11.4 0.0 0.0 20.6 7.5BCHH 322-2 BG II 6.7 6.9 0.0 0.0 3.4 3.4 10.3 0.0 0.0 17.5 6.2

Open boll damage (%)

Entry

Locule damage (%)

76

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EVALUATION UNDER UNPROTECTED CONDITIONS Under unprotected condition, germination and plant stand at harvest was satisfactory for all the hybrids tested in the trial (Table 68).

Table 68. Germination and Plant Stand under Unprotected condition

Coi

mba

tore

Sri

villi

puth

r

LAM Overall

mean

Coi

mba

tore

LAM Overall

mean


Germination (%) Stand at harvest (No. of plants)

Entry

At Coimbatore and at Lam, very minimal damage to open boll was reported due to bollworms (Table 69). In contrast, higher level of damage was observed at Srivilliputhur, Aruppukottai and at Dharwad and there was not much variation between the hybrids.

Table 69. Open Boll Damage – Boll basis (%) under Unprotected condition

Coi

mba

tore

Sri

villi

puth

r

LAM

Aru

ppuk

otta

i

Overall mean

Coi

mba

tore

Sri

villi

puth

r

LAM

Dha

rwad

Aru

ppuk

otta

i

Overall mean

JK Gowri Bt (ET 1) 0.0 8.9 0.0 8.6 4.4 0.0 10.2 0.0 10.9 8.4 5.9Akka BG II 0.0 18.7 0.0 8.9 6.9 0.0 22.9 0.0 7.8 8.5 7.9Bunny (Non-Bt check) 0.0 18.1 0.0 8.6 6.7 0.0 25.0 0.0 5.8 8.2 7.8KDCHH 441 BG II 0.0 18.7 0.0 3.2 5.5 0.0 25.5 0.0 6.7 2.9 7.0Ankur Jai Bt 1.5 10.4 0.0 6.7 4.7 0.0 10.1 0.0 4.9 6.3 4.3RCH 2 Bt (Bt check) 0.0 9.0 0.0 7.2 4.0 0.0 10.8 0.0 8.5 6.7 5.2NCEH 13 Bt (FG) 0.0 18.4 0.0 6.7 6.3 0.0 21.0 0.0 11.0 6.2 7.6Tulasi 9 BG II 0.0 17.2 0.0 6.6 6.0 0.0 11.8 0.0 11.3 6.2 5.9Brahma BG II 0.0 17.2 0.0 5.8 5.8 0.0 20.0 0.0 9.7 5.4 7.0LC (Hybrid Check) 0.0 15.1 0.0 7.2 5.6 0.0 22.5 0.0 11.9 6.7 8.2BCHH 322-2 BG II 0.5 8.0 0.0 4.2 3.2 0.0 10.8 0.0 9.8 3.8 4.9


Entry

77

�� !" #��

Seed cotton yield The mean seed cotton yield recorded under unprotected conditions was the highest in KDCHH 441 BG II (1514 kg/ha) followed by Tulasi 9 BG II (1464 kg/ha) in irrigated situation whereas the Bt check hybrid registered a mean yield of 924 kg/ha (Table 70). All the test hybrids were superior in yield to RCH 2 Bt.

Table 70. Seed cotton yield (kg/ha) in irrigated locations under unprotected conditions


KDCHH 441 BG II 988 2040 1514 64Tulasi 9 BG II 787 2141 1464 58LC (Hybrid Check) 864 1954 1409 52Brahma BG II 725 2091 1408 52Akka BG II 741 1794 1268 37Bunny (Non-Bt check) 586 1866 1226 33BCHH 322-2 BG II 556 1686 1121 21Ankur Jai Bt 1065 1143 1104 19JK Gowri Bt (ET 1) 494 1561 1028 11NCEH 13 Bt (FG) 417 1498 958 4RCH 2 Bt (Bt check) 617 1230 924 0

Under rainfed situations, the highest seed cotton yield of 1717 kg/ha was noted in Tulasi 9 BG II with 21 % yield increase over RCH 2 Bt (1416 kg/ha) and four other hybrids also registered higher yield to a tune of 9 to 16 % over RCH 2 Bt (Table 71).

Table 71. Seed cotton yield (kg/ha) in rainfed locations under unprotected conditions

Entry LAM Aruppukottai Mean (RF) % Inc. over RCH 2 BtTulasi 9 BG II 1293 2141 1717 21NCEH 13 Bt (FG) 1316 1973 1645 16Brahma BG II 1325 1936 1631 15Ankur Jai Bt 1178 2083 1631 15KDCHH 441 BG II 1074 2015 1545 9LC (Hybrid Check) 1048 1858 1453 3RCH 2 Bt (Bt check) 1048 1784 1416 0BCHH 322-2 BG II 1164 1305 1235 -13Bunny (Non-Bt check) 1247 1207 1227 -13Akka BG II 1025 1371 1198 -15JK Gowri Bt (ET 1) 674 1333 1004 -29

78

�� !" #��

COMBINED REPORT OF INTRA HIRSUTUM HYBRID TRIALS (2006-07 & 2007-08)

As listed in the second year evaluation trial, eight Bt cotton hybrids were evaluated for two successive years during 2006-07 and 2007-08 in South Zone. These hybrids were evaluated at six irrigated centres of AICCIP and five rainfed centres. The check Bt hybrids was RCH 2 Bt and non-Bt check hybrid was Bunny and local check hybrids.

IRRIGATED LOCATIONS

Germination and plant stand was good at both the years of evaluation in all the test entries and check hybrids (Table 72)

Table 72. Germination Percentage and Plant Stand under protected & irrigated condition

2006-07 2007-08 Mean 2006-07 2007-08 MeanAkka BG II 91.7 88.3 90.0 54.0 48.8 51.4Ankur Jai Bt 94.2 92.8 93.5 56.0 50.7 53.3BCHH 322-2 BG II 86.1 86.7 86.4 48.5 47.2 47.8Brahma BG II 96.9 86.1 91.5 57.2 43.2 50.2Bunny (Non-Bt check) 95.6 89.4 92.5 56.8 41.3 49.1JK Gowri Bt (ET 1) 93.6 84.4 89.0 55.7 41.0 48.4KDCHH 441 BG II 94.2 92.2 93.2 55.8 47.5 51.7LC (Hybrid Check) 95.8 83.3 89.6 57.0 44.8 50.9NCEH 13 Bt (FG) 95.0 86.1 90.6 56.0 46.3 51.2RCH 2 Bt (Bt check) 98.1 93.3 95.7 58.8 43.0 50.9Tulasi 9 BG II 93.6 88.9 91.2 55.7 46.3 51.0

EntryGermination % Stand at harvest (number of

plants)

The mean boll weight ranged between 4.7 and 5.9 g while the mean ginning outturn ranged from 35.1 to 37.4 % over two years (Table 73).

Table 73. Boll weight (g) and Ginning Outturn (%) under protected & irrigated condition


EntryMean boll weight (g) Mean Ginning Out Turn (%)

79

�� !" #��

Over two years average, the lint index ranged from 5.7 to 6.7 g while the seed index varied from 10.3 to 11.9 g (Table 74).

Table 74. Lint index (g) and Seed Index (g) under protected & irrigated condition


EntryLint index Seed index (g)

Combined mean of seed cotton yield indicated the superiority of all the test hybrids over RCH 2 Bt except NCEH 13 Bt (FG) and JK Gowri Bt (Table 75). The test hybrid Brahma BG II was the best with 2524 kg/ha registering 12 % yield increase over RCH 2 Bt. Five other test hybrids were superior to Bt check with 4 to 11 % yield increase.

Table 75. Seed cotton yield (kg/ha) under protected & irrigated condition

2006-07 2007-08 MeanBrahma BG II 2560 2488 2524 12Ankur Jai Bt 2240 2727 2484 11BCHH 322-2 BG II 2010 2854 2432 8Tulasi 9 BG II 2169 2621 2395 7Akka BG II 2205 2552 2378 6KDCHH 441 BG II 2009 2671 2340 4RCH 2 Bt (Bt check) 2104 2385 2244 0NCEH 13 Bt (FG) 2068 1965 2016 -10JK Gowri Bt (ET 1) 1992 1796 1894 -16Bunny (Non-Bt check) 1999 1766 1883 -16LC (Hybrid Check) 1672 1975 1823 -19

EntrySeed cotton yield (kg/ha) % Inc. over RCH

2 Bt

80

�� !" #��

Several hybrids were found superior to check hybrids in terms of fibre length (Table 76) but there was not much variation in micronaire value evident over the year.

Table 76. 2.5% Span length (mm) and Micronaire under protected & irrigated condition


Entry2.5% span length (mm) Micronaire value

Not much variation across the hybrid and across the year was observed for both fibre strength and uniformity ratio (Table 77). Several hybrids were superior to Bt check hybrid in terms of fibre strength and as high as 23.3 g/tex was noted in Akka BG II.

Table 77. Fibre Strength (g/tex) and Uniformity ratio under protected & irrigated condition


Strength (g/tex)Entry

Uniformity ratio

81

�� !" #��

For sucking pest like jassids, white fly, thrips and aphid per plant, not much variation was noticed between Bt and non Bt hybrids (Tables 78 & 79). However, incidence of pest like aphids varied across the year.

Table 78. Number of Jassids / plant and White flies / plant under irrigated protected condition


EntryJassid/ plant Whitefly/ plant

Table 79. Number of Thrips / plant and Aphids / plant under protected & irrigated condition


EntryThrips/ plant Aphid/plant

82

�� !" #��

Under irrigated conditions, non Bt hybrids registered more number of pink bollworm and higher damage to green bolls and squares as against Bt hybrids (Table 80).

Table 80. Pink boll worm damage in green bolls (%), Number of Pink boll worm larvae / 20 bolls and Per cent square damage under protected & irrigated condition

2006-07 2007-08 Mean 2006-07 2007-08 Mean 2006-07 2007-08 Mean

Akka BG II 6.9 0.0 3.5 0.7 0.0 0.4 1.4 0.2 0.8Ankur Jai Bt 6.1 0.7 3.4 0.4 0.0 0.2 2.9 0.1 1.5BCHH 322-2 BG II 5.3 0.0 2.6 1.0 0.0 0.5 1.7 0.0 0.8Brahma BG II 4.2 0.0 2.1 0.8 0.0 0.4 1.4 0.1 0.7Bunny (Non-Bt check) 11.1 0.0 5.6 1.6 0.0 0.8 12.3 10.2 11.3JK Gowri Bt (ET 1) 11.4 0.0 5.7 1.2 0.0 0.6 16.0 0.0 8.0KDCHH 441 BG II 6.4 0.0 3.2 0.8 0.0 0.4 1.0 0.1 0.5LC (Hybrid Check) 11.4 0.3 5.8 1.6 0.0 0.8 13.9 9.6 11.8NCEH 13 Bt (FG) 4.7 0.0 2.4 0.9 0.0 0.4 1.4 0.0 0.7RCH 2 Bt (Bt check) 4.2 0.0 2.1 0.5 0.0 0.3 0.9 0.1 0.5Tulasi 9 BG II 6.9 0.0 3.5 0.7 0.0 0.4 1.5 1.0 1.3

Entry

Damage in green bolls (%) Larvae / 20 green bolls % square damage by Bollworms

The mean data pertaining to open boll damage due to bollworms in terms of boll basis and locule basis is furnished in Table 81. All the Bt hybrids were superior to non Bt hybrids in terms of boll damage except JK Gowri Bt (ET 1).

Table 81. Open boll damage (%) - Boll and locule basis under protected & irrigated condition


EntryOpen boll damage (%) Locule damage (%)

83

�� !" #��

Under unprotected condition, however, on boll basis several Bt entries showed either equal or higher damage as that of non Bt check hybrid (Table 82). On locule basis, all the hybrids except KDCHH 441 BG II had lesser damage due to bollworms.

Table 82. Open boll damage (%) - Boll and locule basis under unprotected & irrigated condition


Open boll damage (%) Locule damage (%)Entry

Under unprotected condition, the highest mean seed cotton yield over the two year was recorded in the hybrid Tulasi 9 BG II (1511 kg/ha) with 26 yield increase over RCH 2 Bt (1195 kg/ha). The test hybrid NCEH 13 Bt performed poorly recording the lowest yield of 1072 kg/ha.

Table 83. Mean seed cotton yield (kg/ha) under unprotected & irrigated condition

2006-07 2007-08 MeanTulasi 9 BG II 1557 1464 1511 26LC (Hybrid Check) 1404 1409 1407 18Akka BG II 1494 1268 1381 16Ankur Jai Bt 1388 1104 1246 4JK Gowri Bt (ET 1) 1447 1028 1237 4Brahma BG II 1055 1408 1232 3BCHH 322-2 BG II 1342 1121 1231 3RCH 2 Bt (Bt check) 1467 924 1195 0KDCHH 441 BG II 738 1514 1126 -6Bunny (Non-Bt check) 956 1226 1091 -9NCEH 13 Bt (FG) 1186 958 1072 -10

Seed cotton yield (kg/ha) % Inc. over RCH 2 BtEntry

84

�� !" #��

COMBINED REPORT OF RAINFED LOCATIONS (2006-07 & 2007-08)

As observed in irrigated locations, in rainfed locations also, there was satisfactory germination of all the hybrids and proper plant stand was maintained (Table 84).

Table 84. Germination Percentage and Plant Stand under protected & rainfed condition


Entry Germination %Stand at harvest (number of

plants)

For boll weight, Brahma BG II was the best hybrid (5.0 g) and for ginning outturn Tulasi 9 BG II registered highest value of 36.7 % (Table 85).

Table 85. Boll weight (g) and Ginning Outturn (%) under protected & rainfed condition


Entry Mean boll weight (g) Mean Ginning Out Turn (%)

85

�� !" #��

For both lint index and seed index, there was not much variation between the years and between the hybrids (Table 86).

Table 86. Lint index (g) and Seed Index (g) under protected & rainfed condition


Entry Lint index Seed index (g)

The mean seed cotton yield recorded over the two years is furnished in Table 87. The test hybrid KDCHH 441 BG II was found to be the best recording 2296 kg/ha under rainfed locations with 17 % yield increase over the Bt check hybrid. Only NCEH 13 Bt was found to record lower yield than Bt check hybrid and all the test hybrids were superior to non Bt check hybrids.

Table 87. Seed cotton yield (kg/ha) under protected & rainfed condition

2006-07 2007-08 MeanKDCHH 441 BG II 2209 2383 2296 16.7Tulasi 9 BG II 2095 2328 2212 12.4Ankur Jai Bt 2167 2191 2179 10.8Brahma BG II 2129 2144 2136 8.6Akka BG II 2112 2113 2113 7.4JK Gowri Bt (ET 1) 1897 2263 2080 5.8BCHH 322-2 BG II 2000 1950 1975 0.4RCH 2 Bt (Bt check) 2037 1898 1967 0.0NCEH 13 Bt (FG) 2158 1775 1966 0.0Bunny (Non-Bt check) 1961 1748 1854 -5.7LC (Hybrid Check) 1814 1810 1812 -7.9

Entry Seed cotton yield (kg/ha) % Inc. over RCH 2 Bt

86

�� !" #��

Fibre quality evaluation over the two years are furnished in Tables 88 and 89. For fibre length some test hybrids like Akka BG II and Ankur Jai Bt were found superior and for fibre strength Brahma BG II was the best with 22.8 g/tex.

Table 88. 2.5% Span length (mm) and Micronaire under protected & rainfed condition


Entry 2.5% span length (mm) Micronaire value

Table 89. Fibre Strength (g/tex) and Uniformity ratio under protected & rainfed condition


Strength (g/tex)Entry Uniformity ratio

87

�� !" #��

All the test hybrids and check hybrids showed equal reaction to sucking pests like jassids, white fly, thrips and aphids per plant (Tables 90 & 91).

Table 90. Number of Jassids / plant and White flies / plant under rainfed protected condition


Entry Jassid/ plant Whitefly/ plant

Table 91. Number of Thrips / plant and Aphids / plant under protected & rainfed condition


Entry Thrips/ plant Aphid/plant

88

�� !" #��

For pink boll worm damage and number in green bolls, all the test hybrids recorded less damage except JK Gowri Bt (ET 1). For square damage, highest damage of 6.8 % was noted in JK Gowri Bt (ET 1) followed by Ankur Jai Bt (6.4 %) while other hybrids showed lesser damage (Table 92).

Table 92. Pink boll worm damage in green bolls (%), Number of Pink boll worm larvae / 20 bolls and Per cent square damage under protected & rainfed condition

2006-07 2007-08 Mean 2006-07 2007-08 Mean 2006-07 2007-08 MeanAkka BG II 8.3 0.0 4.2 0.7 0.0 0.4 2.5 8.0 5.3Ankur Jai Bt 9.2 0.0 4.6 0.7 0.0 0.4 1.5 11.3 6.4BCHH 322-2 BG II 12.5 0.0 6.3 0.4 0.0 0.2 2.3 5.7 4.0Brahma BG II 16.7 0.0 8.3 1.3 0.0 0.7 1.9 9.2 5.5Bunny (Non-Bt check) 31.7 0.0 15.8 5.1 0.0 2.5 4.1 7.3 5.7JK Gowri Bt (ET 1) 40.8 0.0 20.4 3.7 0.0 1.8 5.1 8.6 6.8KDCHH 441 BG II 7.5 0.0 3.7 3.0 0.0 1.5 1.6 7.6 4.6LC (Hybrid Check) 43.3 0.0 21.7 3.3 0.0 1.7 4.8 7.2 6.0NCEH 13 Bt (FG) 8.3 0.0 4.2 0.7 0.0 0.3 1.8 8.5 5.1RCH 2 Bt (Bt check) 14.2 0.0 7.1 0.1 0.0 0.0 1.3 7.8 4.6Tulasi 9 BG II 14.2 0.0 7.1 0.1 0.0 0.0 1.4 5.1 3.2

Entry Damage in green bolls (%) Larvae / 20 green bolls% square damage by

Bollworms

Combined mean of open boll damage on both boll and locule basis is furnished in Table 93. Comparatively, less damage was recorded in the current year as compared to last year on both boll and locule basis. Some Bt hybrids have recorded higher damage as compared to non Bt check hybrid.

Table 93. Open boll damage (%) - Boll and locule basis under protected & rainfed condition


Entry Open boll damage (%) Locule damage (%)

89

�� !" #��

Under unprotected conditions, however, higher boll damage was recorded in the current year on both boll basis and locule basis (Table 94). In this case also, some Bt hybrids registered higher boll damage as compared to non Bt check hybrid.

Table 94. Open boll damage (%) - Boll and locule basis under unprotected & rainfed condition


Open boll damage (%) Locule damage (%)Entry

Under unprotected rainfed situations, the highest mean seed cotton yield of 1555 kg/ha was observed with 13 % yield increase over RCH 2 Bt. All the Bt hybrids were superior to non Bt check hybrid Bunny.

Table 95. Mean seed cotton yield (kg/ha) under unprotected & rainfed condition

2006-07 2007-08 MeanTulasi 9 BG II 1392 1717 1555 13Ankur Jai Bt 1343 1631 1487 8NCEH 13 Bt (FG) 1278 1645 1461 6LC (Hybrid Check) 1454 1453 1454 6KDCHH 441 BG II 1300 1545 1422 3Brahma BG II 1145 1631 1388 1RCH 2 Bt (Bt check) 1331 1416 1374 0BCHH 322-2 BG II 1398 1235 1316 -4Akka BG II 1430 1198 1314 -4JK Gowri Bt (ET 1) 1445 1004 1224 -11Bunny (Non-Bt check) 1151 1227 1189 -13

Seed cotton yield (kg/ha) % Inc. over RCH 2 Bt

Entry

90

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EVALUATION OF INTERSPECIFIC (G. HIRSUTUM X G. BARBADENSE) HYBRIDS

Trial entries

In the first year trial, nine interspecific hybrids (hirsutum x barbadense) were evaluated along with MRC 6918 as Bt check hybrid and DCH 32 as non Bt check hybrid. The list of test hybrids and the sponsoring company is furnished here below.

S. No. Name of the hybrid Name of the Company 1. SP 911 B2 (Minerva) Bayer Bioscience Pvt. Limited.

2. MLBCH-6 BGII Emergent Genetics India Pvt. Ltd.

3. GBCH 03 Green Gold Seeds Ltd.

4. JKCHB 5 Bt J. K. Agri Genetics Ltd.

5. JKCHB-229 Bt J. K. Agri Genetics Ltd.

6. KDCHB 407 BGII Krishidhan seeds Ltd.

7. NCEH-23 Nath Seeds Ltd.

8. RCHB- 720 BG II Rasi Seed Co. Ltd.

9. ZCH-50007 Zuari Seeds Ltd

Trial Locations The trial was conducted at four different locations:

1. Agricultural Research Station, Amravati, Lam, Acharya N. G. Ranga Agricultural University, Andhra Pradesh,

2. Agricultural Research Station, Dharwad, University of Agricultural Sciences, Karnataka,

3. Agricultural Research Station, Beemarayangudi, University of Agricultural Sciences, Karnataka, and

4. Cotton Research Station, Tamil Nadu Agricultural University, Coimbatore.

Trial Details No.of Entries : 9 + 2 check No.of Rows : Yield Trial : 5 Rows : Screening trials : 2 Rows Row length : 6 m Spacing: : 120 x 60 cm No.of Replications : Four Design : Randomized Block Design Fertilizers : As per recommendations Germination and Plant stand

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Desirable germination was recorded and good plant stand was maintained in all the hybrids as furnished in the Table 96.

Table 96. Germination and Plant stand under ETL based protection

Entry Germination (%) Plant stand at harvest

Coimbatore B'gudi Coimbatore LAM Mean MLBCH-6 BGII 85.0 46.7 57.0 58.7 54.1 MRC 6918 Bt (Bt Check) 85.6 47.0 55.7 59.7 54.1 SP 911 B2 (Minerva) 87.2 41.3 49.7 59.3 50.1 KDCHB 407 BGII 86.1 48.7 52.0 59.0 53.2 JKCHB-229 Bt 89.4 48.0 53.7 60.0 53.9 ZCH-50007 89.4 47.3 57.7 59.0 54.7 NCEH-23 88.3 45.7 58.7 60.0 54.8 JKCHB 5 Bt 90.6 44.7 57.7 59.7 54.0 DCH 32 (Non Bt Check) 91.1 47.3 57.7 59.7 54.9 RCHB- 720 BG II 86.7 48.0 57.3 59.3 54.9 GBCH 03 90.6 46.3 56.0 59.3 53.9 Boll weight The mean boll weight ranged from 3.6 g to 4.4 g in the hybrids (Table 97). All the test hybrids were better than the Bt check hybrid.

Table 97. Mean boll weight under ETL based protection

Entry Coimbatore LAM Dharwad Mean

MLBCH-6 BGII 4.8 4.0 4.2 4.3

MRC 6918 Bt (Bt Check) 4.4 3.5 2.9 3.6

SP 911 B2 (Minerva) 4.4 3.7 3.9 4.0

KDCHB 407 BGII 4.6 3.5 4.1 4.0

JKCHB-229 Bt 4.6 3.6 3.5 3.9

ZCH-50007 4.6 3.8 4.2 4.2

NCEH-23 4.5 4.0 3.9 4.2

JKCHB 5 Bt 4.6 3.9 3.5 4.0

DCH 32 (Non Bt Check) 4.8 4.0 3.8 4.2

RCHB- 720 BG II 4.7 4.1 4.3 4.4

GBCH 03 4.9 3.4 4.0 4.1

92

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Ginning out turn The ginning outturn data was recorded in Dharwad, Coimbatore and Lam and the mean data varied between 31.5 and 34.0 % (Table 98). Six test hybrids were better than the Bt check hybrid.

Table 98. Ginning Outturn (%) under ETL based protection

Entry Coimbatore LAM Dharwad Mean MLBCH-6 BGII 31.3 30.8 33.3 31.8 MRC 6918 Bt (Bt Check) 31.8 34.3 33.2 33.1 SP 911 B2 (Minerva) 32.6 33.5 34.9 33.6 KDCHB 407 BGII 32.5 35.3 34.3 34.0 JKCHB-229 Bt 31.0 32.4 33.3 32.3 ZCH-50007 32.1 33.6 33.9 33.2 NCEH-23 32.8 33.7 33.6 33.4 JKCHB 5 Bt 32.3 35.7 33.2 33.7 DCH 32 (Non Bt Check) 32.6 32.8 35.2 33.6 RCHB- 720 BG II 31.1 32.5 31.0 31.5 GBCH 03 33.6 33.8 34.6 34.0

Lint Index The lint index ranged from 5.7 to 6.4 g in the hybrids (Table 99). All the test hybrids recorded higher lint index as compared to Bt check hybrid.



93

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Seed Index The range of seed index in hybrids was between 11.3 and 13.6 g (Table 100). Six test hybrids were better than the Bt check hybrid.



MEAN SEED COTTON YIELD UNDER ETL BASED PLANT PROTECTION The data on mean seed cotton yield indicated that the test hybrid JKCHB 5 Bt was the best one recording 2880 kg/ha with 31 % more yield than MRC 6918 Bt and 60 % higher yield than DCH 32 (Table 101). GBCH 03 and ZCH 50007 recorded lesser yield than the Bt check hybrid but higher yield over Non-Bt check hybrid DCH 32.

Table 101. Seed Cotton yield (kg/ha) under ETL based protection

Entry

Coi

mba

tore

LAM

Dha

rwad

Mean % Inc. over MRC 6918 (Bt check)

% Inc. over

DCH 32 (Non-Bt check)

JKCHB 5 Bt 2667 2867 3107 2880 31 60 JKCHB-229 Bt 2503 2782 2638 2641 20 47 MLBCH-6 BGII 2644 2537 2599 2593 18 44 KDCHB 407 BGII 2560 2618 2605 2594 18 44 NCEH-23 2255 2784 2802 2613 18 45 SP 911 B2 (Minerva) 2907 1993 2754 2551 16 42 RCHB- 720 BG II 2116 2409 2241 2255 2 25 MRC 6918 Bt (Bt Check) 2329 1887 2404 2206 0 23 GBCH 03 2139 1829 1853 1940 -12 8 ZCH-50007 1593 2141 2034 1923 -13 7 DCH 32 (Non Bt Check) 1588 1742 2070 1800 -18 0 CD @ 5% 483 405 447 CV % 12 10 11

94

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Lint Yield

For lint yield also the test hybrid JKCHB 5 Bt was the best (972 kg/ha) (Table 102). In this case also, all the other test hybrids showed yield superiority over non Bt check hybrid.

Table 102. Lint yield (kg/ha) under ETL based protection

Entry Coimbatore LAM Dharwad Mean JKCHB 5 Bt 863 1022 1030 972 KDCHB 407 BGII 833 923 895 884 NCEH-23 740 938 940 873 SP 911 B2 (Minerva) 948 667 961 859 JKCHB-229 Bt 778 902 879 853 MLBCH-6 BGII 828 769 865 821 MRC 6918 Bt (Bt Check) 741 648 797 728 RCHB- 720 BG II 663 782 694 713 GBCH 03 718 618 641 659 ZCH-50007 512 718 689 640 DCH 32 (Non Bt Check) 519 572 730 607

Fibre quality Evaluation

The fibre length ranged between 33.3 mm and 36.8 mm and micronaire ranged between 3.1 and 3.5 (Table 103).

Table 103. Fibre length and Micronaire under ETL based protection

Entry 2.5% span length (mm) Micronaire

Coimbatore LAM Mean Coimbatore LAM Mean

MLBCH-6 BGII 35.0 33.5 34.2 3.8 3.0 3.4

MRC 6918 Bt (Bt Check) 35.4 32.2 33.8 3.5 3.1 3.3

SP 911 B2 (Minerva) 34.4 32.2 33.3 3.9 3.1 3.5

KDCHB 407 BGII 34.4 32.2 33.3 3.7 3.2 3.4

JKCHB-229 Bt 37.1 35.1 36.1 3.6 3.1 3.4

ZCH-50007 35.0 34.2 34.6 3.7 2.6 3.1

NCEH-23 34.9 33.5 34.2 3.6 2.9 3.3

JKCHB 5 Bt 38.0 35.1 36.6 3.6 3.4 3.5

DCH 32 (Non Bt Check) 37.2 36.4 36.8 3.8 3.1 3.5

RCHB- 720 BG II 37.6 34.3 36.0 3.4 2.8 3.1

GBCH 03 35.7 33.1 34.4 3.9 2.6 3.3

95

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Several test hybrids registered bundle strength of more than 26 g/tex (Table 104) and there was not much variation in uniformity ratio.

Table 104 . Bundle strength and Uniformity Ratio under ETL based protection

Entry Bundle strength Uniformity ratio


MLBCH-6 BGII 24.8 25.0 24.9 49.3 46.8 48.1

MRC 6918 Bt (Bt Check) 26.1 25.8 25.9 49.3 48.7 49.0

SP 911 B2 (Minerva) 23.5 24.2 23.8 51.7 47.5 49.6

KDCHB 407 BGII 24.4 24.4 24.4 50.7 47.0 48.8

JKCHB-229 Bt 27.4 27.9 27.7 50.3 50.3 50.3

ZCH-50007 28.4 27.4 27.9 51.3 48.0 49.7

NCEH-23 22.9 24.4 23.7 47.7 47.9 47.8

JKCHB 5 Bt 26.5 25.3 25.9 49.3 47.3 48.3

DCH 32 (Non Bt Check) 24.0 24.0 24.0 48.7 47.2 47.9

RCHB- 720 BG II 27.0 26.2 26.6 49.0 47.3 48.1

GBCH 03 25.8 25.5 25.7 49.0 46.7 47.9

ENTOMOLOGICAL EVALUATION EVALUATION UNDER PLANT PROTECTION (ETL BASED) Sucking pests (Jassids, Whitefly, Thrips and Aphids population)

The mean number of jassids (Table 105), white flies (Table 106), Thrips (Table 107) and Aphids (Table 108) per plant recorded in the hybrids indicated not much variation between Bt and non Bt hybrid.

Table 105. Number of Jassids / plant under ETL based protection

Entry B'gudi Coimbatore LAM Dharwad Mean MLBCH-6 BGII 3.8 2.9 2.0 3.3 3.0 MRC 6918 Bt (Bt Check) 4.7 3.0 5.6 4.4 4.4 SP 911 B2 (Minerva) 1.3 2.5 2.7 3.8 2.6 KDCHB 407 BGII 4.3 3.6 2.6 5.9 4.1 JKCHB-229 Bt 1.6 3.2 1.3 4.8 2.7 ZCH-50007 4.7 3.4 5.1 4.8 4.5 NCEH-23 1.4 3.0 2.3 3.0 2.4 JKCHB 5 Bt 3.1 2.7 2.5 5.8 3.5 DCH 32 (Non Bt Check) 2.9 3.5 4.4 4.0 3.7 RCHB- 720 BG II 1.3 3.6 2.1 4.1 2.8 GBCH 03 2.7 4.4 7.2 5.4 4.9

96

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Table 106. Number of white flies / plant under ETL based protection

Entry Coimbatore LAM Mean MLBCH-6 BGII 0.0 0.6 0.3 MRC 6918 Bt (Bt Check) 0.0 0.5 0.2 SP 911 B2 (Minerva) 0.1 0.3 0.2 KDCHB 407 BGII 0.1 0.5 0.3 JKCHB-229 Bt 0.1 0.4 0.3 ZCH-50007 0.1 0.3 0.2 NCEH-23 0.0 0.6 0.3 JKCHB 5 Bt 0.1 0.4 0.3 DCH 32 (Non Bt Check) 0.1 0.5 0.3 RCHB- 720 BG II 0.1 0.5 0.3 GBCH 03 0.0 0.5 0.3

Table 107. Number of thrips / plant under ETL based protection


Table 108. Number of aphids / plant under ETL based protection


97

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No square damage was recorded at Coimbatore and Lam but at Dharwad damage was reported but there was not much difference between the Bt test hybrids and the non-Bt hybrid (Table 109).

Table 109. Square damage (%) under ETL based protection


Pink bollworm incidence was low at Coimbatore and Lam and the non Bt check hybrid DCH 32 recorded higher level of incidence and damage (Table 110).

Table 110. Pink bollworm number and damage in green boll

Entry Pink bollworm / 20 green

boll Pink bollworm damage in green

boll Coimbatore Lam Mean Coimbatore Lam Mean

MLBCH-6 BGII 0.0 0.0 0.0 0.0 0.0 0.0 MRC 6918 Bt (Bt Check) 0.0 0.0 0.0 0.0 0.0 0.0 SP 911 B2 (Minerva) 0.0 0.0 0.0 0.0 0.0 0.0 KDCHB 407 BGII 0.5 0.0 0.3 2.5 0.0 1.3 JKCHB-229 Bt 0.0 0.0 0.0 0.0 0.0 0.0 ZCH-50007 0.0 0.0 0.0 0.0 0.0 0.0 NCEH-23 0.0 0.0 0.0 0.0 0.0 0.0 JKCHB 5 Bt 0.0 0.0 0.0 0.0 0.0 0.0 DCH 32 (Non Bt Check) 1.0 0.0 0.5 5.0 0.0 2.5 RCHB- 720 BG II 0.0 0.0 0.0 0.0 0.0 0.0 GBCH 03 0.0 0.0 0.0 0.0 0.0 0.0

98

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Open boll and Locule damage

Open boll damage was low at Coimbatore and Lam and there was moderate difference in the locule damage between the hybrids (5.4 – 10.0 %) (Table 111).

Table 111. Open boll damage on boll and locule basis


Entry B

'gud

i

Coi

mba

tore

LAM

Mean

B'g

udi

Coi

mba

tore

LAM

Dha

rwad

Mean

MLBCH-6 BGII 0.0 0.0 0.0 0.0 15.6 0.0 0.0 6.1 5.4 MRC 6918 Bt (Bt Check) 2.0 0.0 0.0 0.7 24.9 0.0 0.0 11.1 9.0 SP 911 B2 (Minerva) 0.0 0.0 0.0 0.0 21.6 0.0 0.0 11.6 8.3 KDCHB 407 BGII 1.0 0.0 0.0 0.3 18.0 0.5 0.0 20.4 9.7 JKCHB-229 Bt 0.9 0.0 0.0 0.3 19.3 0.0 0.0 8.9 7.0 ZCH-50007 2.7 0.3 0.0 1.0 20.3 0.0 0.0 14.6 8.7 NCEH-23 0.0 0.0 0.0 0.0 20.8 0.0 0.0 11.1 8.0 JKCHB 5 Bt 2.8 0.0 0.0 0.9 18.4 0.0 0.0 14.2 8.1 DCH 32 (Non Bt Check) 1.0 0.2 0.0 0.4 23.1 2.0 0.0 11.7 9.2 RCHB- 720 BG II 0.0 0.5 0.0 0.2 19.1 2.8 0.0 16.8 9.7 GBCH 03 0.0 0.0 0.0 0.0 19.6 0.0 0.0 20.6 10.0

EVALUATION UNDER UNPROTECTED CONDITIONS Germination and plant stand were satisfactory at Coimbatore and Lam (Table 112).

Table 112. Germination and plant stand under unprotected condition



MLBCH-6 BGII 90.0 91.2 90.6 27.0 28.3 27.7

MRC 6918 Bt (Bt Check) 90.0 83.2 86.6 27.0 24.3 25.7

SP 911 B2 (Minerva) 77.0 85.2 81.1 23.0 26.0 24.5

KDCHB 407 BGII 83.0 89.6 86.3 25.0 27.0 26.0

JKCHB-229 Bt 100.0 95.3 97.7 30.0 28.0 29.0

ZCH-50007 90.0 97.9 94.0 27.0 26.0 26.5

NCEH-23 83.0 90.2 86.6 25.0 26.0 25.5

JKCHB 5 Bt 87.0 82.5 84.8 26.0 23.3 24.7

DCH 32 (Non Bt Check) 90.0 84.4 87.2 27.0 25.3 26.2

RCHB- 720 BG II 90.0 90.3 90.2 27.0 26.0 26.5

GBCH 03 90.0 98.4 94.2 27.0 28.7 27.9

99

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At Coimbatore only JKCHB 5 Bt (1.0 %) and DCH 32 (1.5 %) registered open boll damage on boll basis (Table 113). On locule basis, lesser damage was recorded in SP 911 B2 and KDCHB 407 BG II while other hybrids had considerably higher damage.

Table 113. Open boll damage on boll basis and locule basis under unprotected condition

Entry Boll basis Locule Basis Coimbatore Coimbatore Dharwad Mean

MLBCH-6 BGII 0.0 0.0 21.0 10.5 MRC 6918 Bt (Bt Check) 0.0 0.0 17.2 8.6 SP 911 B2 (Minerva) 0.0 0.0 6.1 3.0 KDCHB 407 BGII 0.0 0.0 7.8 3.9 JKCHB-229 Bt 1.0 0.0 14.7 7.4 ZCH-50007 0.0 0.0 13.1 6.6 NCEH-23 0.0 0.5 18.6 9.6 JKCHB 5 Bt 0.0 0.5 19.2 9.8 DCH 32 (Non Bt Check) 1.5 0.5 17.5 9.0 RCHB- 720 BG II 0.0 0.0 16.3 8.2 GBCH 03 0.0 0.0 18.6 9.3

All the test Bt hybrids recorded higher seed cotton yield than the Bt and non-Bt check hybrid, except ZCH 50007 and GBCH 03. The highest seed cotton yield of 1631 kg/ha was recorded in JKCHB 5 Bt with 32 % yield increase over MRC 6918 and 39 % increase over DCH 32 (Table 114).

Table 114. Mean seed cotton yield (kg/ha) under unprotected condition


% Inc. over MRC 6918

% In. over

DCH 32

JKCHB 5 Bt 579 471 3844 1631 32 39 JKCHB-229 Bt 1308 425 2798 1510 22 28 MLBCH-6 BGII 255 309 3908 1491 21 27 NCEH-23 255 397 3600 1417 15 21 KDCHB 407 BGII 428 462 3259 1383 12 18 SP 911 B2 (Minerva) 208 277 3646 1377 12 17 RCHB- 720 BG II 208 231 3393 1277 4 9 MRC 6918 Bt (Bt Check) 405 378 2918 1234 0 5 DCH 32 (Non Bt Check) 394 166 2969 1176 -5 0 ZCH-50007 324 314 2759 1132 -8 -4 GBCH 03 382 378 2440 1067 -14 -9

PATHOLOGICAL EVALUATION

There was very less incidence of diseases like Alternaria leaf spot, bacterial leaf blight and rust in interspecific hybrids at Beemarayangudi, Guntur and Coimbatore. Late season mild leaf reddening has been reported to occur in some interspecific hybrids in Beemarayangudi.

100

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SECOND YEAR TRIALS (2007-08)

�� !�

Interspecific hybrids as listed below were evaluated for the second year in succession. The trial was conducted along with DCH 32 as non Bt check hybrid and MRC 6918 as Bt check hybrid following the standard protocol.

S. No. Name of the hybrid Name of the Company 1. JK Chamundi Bt JK seeds 2. MRC 7918 BG II Mahyco Seeds 3. MRC 7929 BG II Mahyco Seeds 4. NCHB 945 Bt Nuziveedu Seeds 5. NCHB 940 Bt Nuziveedu Seeds

Germination and plant stand was good in all the hybrids as furnished in the Table 115.

Table 115. Germination and Plant stand under ETL based protection

Entry Germination (%) Plant stand at harvest

Coimbatore B'gudi Coimbatore LAM Mean NCHB 945 Bt 96.7 46.0 58.0 57.7 53.9 MRC 6918 Bt (Bt Check) 82.8 47.3 53.3 58.3 53.0 MRC 7918 BG II 92.2 49.7 55.3 58.7 54.6 DCH 32 (Non Bt Check) 90.6 47.7 53.3 58.7 53.2 NCHB 940 Bt 93.9 47.7 56.3 58.7 54.2 MRC 7929 BG II 76.7 46.7 45.7 57.7 50.0 JK Chamundi Bt 76.7 46.0 48.0 57.7 50.6

The mean boll weight ranged from 3.8 g to 4.2 g in the hybrids (Table 116).

Table 116. Mean boll weight under ETL based protection

Entry Coimbatore LAM Dharwad Mean NCHB 945 Bt 4.8 3.4 3.7 3.9 MRC 6918 Bt (Bt Check) 4.6 3.6 3.8 4.0 MRC 7918 BG II 4.7 3.5 3.7 4.0 DCH 32 (Non Bt Check) 4.8 3.4 4.3 4.2 NCHB 940 Bt 4.5 3.3 4.2 4.0 MRC 7929 BG II 4.4 4.0 3.6 4.0 JK Chamundi Bt 4.3 3.4 3.9 3.8

101

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The ginning outturn data was recorded in Dharwad, Coimbatore and Lam and the mean data varied between 31.0 and 33.7 % (Table 117).

Table 117. Ginning Outturn (%)under ETL based protection


The lint index ranged from 5.3 to 5.9 g in the hybrids (Table 118).



The range of seed index in hybrids was between 11.4 and 13.2 g (Table 119).



102

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The highest seed cotton yield of 2414 kg/ha was recorded in MRC 7918 BGII with 18 % yield increase over MRC 6918 and 44 % increase over DCH 32 (Table 120). NCHB 940 Bt and JK Chamundi Bt recorded lesser yield than the Bt check hybrid but higher yield over Non-Bt check hybrid DCH 32.

Table 120. Seed Cotton yield (kg/ha) under ETL based protection

Entry

B'g

udi

Coi

mba

tore

LAM

Dha

rwad

Mean % Inc.

over MRC 6918

% In. over

DCH 32

MRC 7918 BG II 844 2431 3306 3076 2414 18 44

NCHB 945 Bt 773 2615 2199 3699 2321 13 38

MRC 7929 BG II 1363 2122 2858 2806 2287 12 36

MRC 6918 Bt (Bt Check) 893 2579 1815 2917 2051 0 22

NCHB 940 Bt 1007 2431 2045 2631 2028 -1 21

JK Chamundi Bt 982 1955 2280 2744 1990 -3 18

DCH 32 (Non Bt Check) 580 1528 1823 2792 1681 -18 0

CD @ 5% 454 376 396

CV % 11 9 8

For lint yield the test hybrid NCHB 945 Bt was the best (909 kg/ha) (Table 121). Other test hybrids were poorer in lint yield over MRC 6918.

Table 121. Lint yield (kg/ha) under ETL based protection



% Inc. over DCH 32

NCHB 945 Bt 800 719 1208 909 13 31

MRC 6918 Bt (Bt Check) 856 583 982 807 0 17

MRC 7918 BG II 692 1071 986 916 14 32

DCH 32 (Non Bt Check) 482 651 942 692 -14 0

NCHB 940 Bt 735 678 933 782 -3 13

MRC 7929 BG II 645 912 882 813 1 17

JK Chamundi Bt 611 912 842 788 -2 14

CD @ 5% 142 127

CV % 12 9

103

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Fibre quality Evaluation

The 2.5 % span length ranged between 33.0 mm and 36.1 mm and micronaire ranged between 2.9 and 3.5 (Table 122).

Table 122. Fibre length and Micronaire under ETL based protection

Entry 2.5% span length (mm) Micronaire


NCHB 945 Bt 35.1 31.3 33.2 4.0 3.0 3.5

MRC 6918 Bt (Bt Check) 36.3 30.8 33.5 3.6 3.0 3.3

MRC 7918 BG II 37.0 34.4 35.7 3.5 3.0 3.2

DCH 32 (Non Bt Check) 38.0 34.1 36.1 3.6 2.9 3.3

NCHB 940 Bt 35.8 30.2 33.0 3.4 2.4 2.9

MRC 7929 BG II 37.0 34.9 35.9 3.8 2.9 3.3

JK Chamundi Bt 35.5 35.1 35.3 3.8 2.9 3.3

The bundle strength ranged from 23.0 to 26.2 g/tex (Table 123) and there was not much variation in uniformity ratio.

Table 123. Bundle strength and Uniformity Ratio under ETL based protection

Entry Bundle strength Uniformity ratio


NCHB 945 Bt 24.5 23.4 24.0 52.0 47.3 49.7

MRC 6918 Bt (Bt Check) 27.5 24.8 26.2 50.7 47.4 49.0

MRC 7918 BG II 25.2 25.4 25.3 49.0 47.1 48.1

DCH 32 (Non Bt Check) 24.5 22.8 23.7 48.3 44.4 46.4

NCHB 940 Bt 24.1 24.5 24.3 51.0 47.2 49.1

MRC 7929 BG II 21.8 24.3 23.0 50.5 46.1 48.3

JK Chamundi Bt 21.7 26.9 24.3 51.3 47.8 49.6

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ENTOMOLOGICAL EVALUATION EVALUATION UNDER PLANT PROTECTION (ETL BASED)

The mean number of sucking pests namely jassids (Table 124), white flies (Table 125), Thrips (Table 126) and Aphids (Table 127) per plant recorded in the hybrids indicated not much variation between Bt and non Bt hybrid.

Table 124. Number of Jassids / plant under ETL based protection

Entry B'gudi Coimbatore LAM Dharwad Mean NCHB 945 Bt 2.5 3.4 2.1 4.5 3.1 MRC 6918 Bt (Bt Check) 1.8 3.4 2.6 3.0 2.7 MRC 7918 BG II 1.6 3.6 1.6 4.5 2.8 DCH 32 (Non Bt Check) 1.7 3.1 1.2 4.4 2.6 NCHB 940 Bt 2.9 4.2 2.6 5.8 3.9 MRC 7929 BG II 4.2 3.2 1.3 3.5 3.0 JK Chamundi Bt 2.5 2.7 1.8 3.8 2.7

Table 125. Number of white flies / plant under ETL based protection

Entry Coimbatore LAM Mean NCHB 945 Bt 0.1 1.2 0.7 MRC 6918 Bt (Bt Check) 0.0 0.7 0.3 MRC 7918 BG II 0.1 1.2 0.6 DCH 32 (Non Bt Check) 0.1 1.1 0.6 NCHB 940 Bt 0.0 1.2 0.6 MRC 7929 BG II 0.0 0.7 0.3 JK Chamundi Bt 0.1 1.1 0.6

Table 126. Number of thrips / plant under ETL based protection


105

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Table 127. Number of aphids / plant under ETL based protection


No square damage was recorded at Coimbatore and Lam but at Dharwad damage was reported and the non-Bt hybrid recorded higher square damage (Table 128).

Table 128. Square damage (%) under ETL based protection


No incidence of Pink bollworm was reported low at Coimbatore and Lam. No open boll damage and locule damage was reported at Coimbatore and Lam and there were little damage to boll as well as locule by bollworms at Beemarayangudi and at Dharwad (Table 129).

Table 129. Open boll damage on boll and locule basis


Entry

B'g

udi

Coi

mba

tor

e

LAM

Mean

B'g

udi

Coi

mba

tor

e

LAM

Dha

rwad

Mean

NCHB 945 Bt 2.0 0.0 0.0 0.7 12.3 0.0 0.0 5.0 4.3 MRC 6918 Bt (Bt Check) 0.0 0.0 0.0 0.0 9.8 0.0 0.0 5.2 3.7 MRC 7918 BG II 0.8 0.0 0.0 0.3 12.1 0.0 0.0 7.1 4.8 DCH 32 (Non Bt Check) 1.3 0.0 0.0 0.4 14.5 0.5 0.0 8.9 6.0 NCHB 940 Bt 0.0 0.0 0.0 0.0 13.2 0.0 0.0 6.1 4.8 MRC 7929 BG II 2.2 0.0 0.0 0.7 13.9 0.0 0.0 10.6 6.1 JK Chamundi Bt 1.4 0.0 0.0 0.5 9.7 0.0 0.0 18.8 7.1

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EVALUATION UNDER UNPROTECTED CONDITIONS Germination and plant stand were good in all hybrids at Coimbatore and Lam (Table 130).

Table 130. Germination and plant stand under unprotected condition



NCHB 945 Bt 67.0 100.0 83.5 20.0 30.0 25.0

MRC 6918 Bt (Bt Check) 70.0 100.0 85.0 21.0 30.0 25.5

MRC 7918 BG II 77.0 93.3 85.2 23.0 27.3 25.2

DCH 32 (Non Bt Check) 87.0 97.8 92.4 26.0 29.3 27.7

NCHB 940 Bt 90.0 100.0 95.0 27.0 29.7 28.3

MRC 7929 BG II 73.0 100.0 86.5 22.0 30.0 26.0

JK Chamundi Bt 87.0 97.8 92.4 26.0 29.3 27.7

At Coimbatore only MRC 7929 BG II (0.5 %) registered open boll damage on boll basis (Table 131) and there was no damage reported at Lam. On locule basis also there was no damage at Lam and lesser damage was recorded at Coimbatore. At Dharwad higher level of locule damage due to bollworms was reported.

Table 131. Open boll damage on boll basis and locule basis under unprotected condition

Entry Boll basis Locule Basis

Coimbatore Lam Mean Coimbatore Lam Dharwad Mean

NCHB 945 Bt 0.0 0.0 0.0 0.0 0.0 13.8 4.6

MRC 6918 Bt (Bt Check) 0.0 0.0 0.0 0.0 0.0 15.1 5.0

MRC 7918 BG II 0.0 0.0 0.0 0.5 0.0 8.8 3.1

DCH 32 (Non Bt Check) 0.0 0.0 0.0 0.5 0.0 7.9 2.8

NCHB 940 Bt 0.0 0.0 0.0 0.0 0.0 13.5 4.5

MRC 7929 BG II 0.5 0.0 0.3 0.0 0.0 5.1 1.7

JK Chamundi Bt 0.0 0.0 0.0 0.0 0.0 13.3 4.4

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Under unprotected conditions, only JK Chamundi was found to record higher yield (2038 kg/ha) over MRC 6918 with 5 % yield increase (Table 132) while other hybrids were inferior to MRC 6918 and the hybrids like MRC 7929 BG II, NCHB 940 Bt and NCHB 945 Bt were lesser yielding than DCH 32.




% In. over

DCH 32

JK Chamundi Bt 243 2194 3677 2038 5 8

MRC 6918 Bt (Bt Check) 475 1695 3665 1945 0 3

MRC 7918 BG II 718 1155 3833 1902 -2 1

DCH 32 (Non Bt Check) 521 1903 3216 1880 -3 0

MRC 7929 BG II 359 1755 3116 1743 -10 -7

NCHB 940 Bt 671 1039 3298 1669 -14 -11

NCHB 945 Bt 382 619 3689 1563 -20 -17

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COMBINED REPORT OF TWO YEAR TRIALS (2006-07 & 2007-08)

As indicated in the second year evaluation trial, five interspecific Bt cotton hybrids were evaluated for two successive years during 2006-07 and 2007-08 in South Zone. These hybrids were evaluated at four irrigated centres of AICCIP along with MRC 6918 as Bt check hybrid and DCH 32 as non-Bt check hybrid.

During both the years, germination was good and hence proper plant stand was maintained till the harvest of the crop (Table 133).

Table 133. Germination Percentage and Plant Stand under protected condition

2006-07 2007-08 Mean 2006-07 2007-08 MeanDCH 32 (Non Bt Check) 92.8 90.6 91.7 57.8 53.2 55.5JK Chamundi Bt 87.8 76.7 82.2 56.3 50.6 53.4MRC 6918 Bt (Bt Check) 87.2 82.8 85.0 56.2 53.0 54.6MRC 7918 BG II 97.8 92.2 95.0 58.8 54.6 56.7MRC 7929 BG II 90.6 76.7 83.6 57.2 50.0 53.6NCHB 940 Bt 91.7 93.9 92.8 57.5 54.2 55.9NCHB 945 Bt 95.0 96.7 95.8 58.5 53.9 56.2

Entry Germination %Stand at harvest (number of

plants)

There was not much variation in boll weight between hybrids (Table 134) and it ranged from 3.7 to 4.0 g in test hybrids. The mean ginning outturn ranged between 30.7 and 33.5 % among test hybrids.

Table 134. Boll weight (g) and Ginning Outturn (%) under protected condition


Entry Mean boll weight (g) Mean Ginning Out Turn (%)

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Considering lint index and seed index, there was not much variation over the past two years as well as between hybrids (Table 135).

Table 135. Lint index (g) and Seed Index (g) under protected condition


Entry Lint index Seed index (g)

Combined mean of seed cotton yield over the last two years indicated the yield superiority of all the test hybrids except JK Chamundi over the Bt check hybrid (Table 136). The highest seed cotton yield of 2493 kg/ha was noted in the hybrid MRC 7918 BG II with 35 % yield increase over MRC 6918 and 67 % increase over DCH 32.

Table 136. Seed cotton yield (kg/ha) under protected condition

2006-07 2007-08 MeanMRC 7918 BG II 2571 2414 2493 35 67MRC 7929 BG II 2377 2287 2332 27 56NCHB 945 Bt 1934 2321 2128 15 43NCHB 940 Bt 2007 2028 2018 9 35MRC 6918 Bt (Bt Check) 1635 2051 1843 0 24JK Chamundi Bt 1607 1990 1799 -2 21DCH 32 (Non Bt Check) 1301 1681 1491 -19 0

Entry Seed cotton yield (kg/ha) % Inc. over DCH 32


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FIBRE QUALITY EVALUATION

Most of the test hybrids had fibre length equivalent to the check hybrids except NCHB 940 Bt (33.6 mm) and NCHB 945 Bt (33.7 mm). For micronaire value, the test hybrids were on par with check hybrids (Table 137).

Table 137. 2.5% Span length (mm) and Micronaire under protected condition


Entry 2.5% span length (mm) Micronaire value

For fibre strength, Bt check hybrid MRC 6918 was the best recording 26.3 g/tex (Table 138) and there is not much variation evident in uniformity ratio.

Table 138. Fibre Strength (g/tex) and Uniformity ratio under protected condition


Uniformity ratioEntry Bundle Strength (g/tex)

For sucking pest like jassids, white fly, thrips and aphid per plant, not much variation was noticed between Bt and non Bt hybrids (Tables 139 & 140). However, incidence of pest like aphids varied across the year.

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Table 139. Number of Jassids / plant and White flies / plant under rainfed protected condition


Entry Jassid/ plant Whitefly/ plant

Table 140. Number of Thrips / plant and Aphids / plant under protected condition


Entry Thrips/ plant Aphid/plant

Non Bt check hybrid DCH 32 recorded higher square as well as green boll damage (Table 141) as compared to Bt hybrids. There is variation between the year for pest incidence.

Table 141. Pink boll worm damage in green bolls (%), Number of Pink boll worm larvae / 20 bolls and Per cent square damage under protected condition

2006-07 2007-08 Mean 2006-07 2007-08 Mean 2006-07 2007-08 MeanDCH 32 (Non Bt Check) 3.3 0.0 1.7 0.2 0.0 0.1 1.7 2.4 2.1JK Chamundi Bt 1.7 0.0 0.8 0.2 0.0 0.1 0.2 0.8 0.5MRC 6918 Bt (Bt Check) 0.8 0.0 0.4 0.2 0.0 0.1 0.3 1.5 0.9MRC 7918 BG II 0.8 0.0 0.4 0.2 0.0 0.1 0.7 0.6 0.6MRC 7929 BG II 0.8 0.0 0.4 0.2 0.0 0.1 0.6 2.0 1.3NCHB 940 Bt 0.8 0.0 0.4 0.2 0.0 0.1 0.7 1.9 1.3NCHB 945 Bt 1.7 0.0 0.8 0.3 0.0 0.2 0.7 1.6 1.2

Entry Damage in green bolls (%) Larvae / 20 green bolls% square damage by

Bollworms

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Under protected condition, higher boll damage on both boll basis and locule basis was noticed in Bt hybrid JK Chamundi as compared to other Bt hybrids and even non Bt check hybrid DCH 32 (Table 142).

Table 142. Open boll damage (%) - Boll and locule basis under protected condition



Under unprotected condition, comparatively lesser damage due to bollworms was reported during the current year (Table 143). However, open boll damage was the maximum in NCHB 940 Bt (4.4 %) on boll basis and on locule basis the maximum damage was noted in JK Chamundi Bt (6.9 %).

Table 143. Open boll damage (%) - Boll and locule basis under unprotected condition



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The mean seed cotton yield under unprotected condition was highest in MRC 7918 BG II (1723 kg/ha) with 20 % yield superiority over MRC 6918 (1723 kg/ha) and 40 % increase over DCH 32 (1231 kg/ha). The hybrids NCHB 940 Bt and NCHB 945 Bt recorded lesser yield than MRC 6918 Bt but were superior to DCH 32.


2006-07 2007-08 MeanMRC 7918 BG II 1543 1902 1723 20 40MRC 7929 BG II 1264 1743 1504 5 22JK Chamundi Bt 929 2038 1483 3 20MRC 6918 Bt (Bt Check) 922 1945 1434 0 16NCHB 940 Bt 918 1669 1294 -10 5NCHB 945 Bt 981 1563 1272 -11 3DCH 32 (Non Bt Check) 581 1880 1231 -14 0


% Inc. over DCH 32

Entry Seed cotton yield (kg/ha)

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Documents

Bt Cotton Hybrids Evaluation Report – South Zone