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Influence of Cadre on Georgia Green Yield and Seed Germination. Eric P. Prostko and Tim L. Grey Department of Crop & Soil Sciences University of Georgia. APRES 2005. Cadre (imazapic). BASF product labeled for peanut in 1996 postemergence nutsedges broadleaf small grasses very popular - PowerPoint PPT Presentation
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Influence of Cadre on Georgia Green Yield and Seed Germination
Eric P. Prostko and Tim L. GreyDepartment of Crop & Soil SciencesUniversity of Georgia
APRES 2005
Cadre (imazapic)
• BASF product• labeled for peanut in
1996• postemergence
– nutsedges– broadleaf– small grasses
• very popular– 64% in GA
• $13-18/A• rotation restrictions
Peanut Varieties and CadreReference Varieties
Weed Tech. 1995 9:801-806 Florunner, NC-V11
Peanut Sci. 1995 22:76-80 Florunner, GA Runner, GK-7, NC-7, NC-V11, Southern Runner, Sunrunner, VC-1
Weed Tech. 1996 10:145-152 Florunner, Southern Runner, Sunrunner
Weed Sci. 1996 44:615-621 Florunner, Southern Runner, NC-7
Weed Tech. 1997 11:714-719 Florunner
Peanut Sci. 1997 24:113-116 Tamrun 88
Weed Tech. 1997 11:520-526 Florunner, Southern Runner
Weed Tech. 1999. 13:494-503 NC-10
Peanut Sci. 2000 27:17-22 Florunner
Weed Tech. 2001 15:26-29 AT-120, GK-7, NC-7, Tamspan 90
Georgia Green in Georgia
30
89 90 88
0
20
40
60
80
100
1997 1999 2001 2003
Year
Acr
es P
lant
ed -
%
Source: UGA Peanut Production Surveys
Peanut Stand Issues
• TSWV
• Florida MDR98
• DP-1
• GA-01R
• Do herbicides influence seed germination?
Objectives
• Influence of Cadre on Georgia Green……
– Yield
– Seed size
– germination
Materials and Methods
• Small plot techniques (4 reps)
• Planting date: May 13, 2004
• twin rows
• Cadre @ 1.44 ozs/A + Agrioil @ 1% v/v– 8, 14, 22, 27, 34, 41, 47, 57 DAP
• Weed-free conditions– Strongarm + Prowl– hand-weeded
• 1000 lbs/A Gypsum on June 23, 2004
Timing (DAP) Stage of Growth
8 V2-V3
14 V5
22 V6
27 R1
34 R1-R2
41 R2
47 R3-R4
57 R4-R5
Stages of Growth
Seed Collection
• 100 pods after digging but before combine• Stored at room temperature for 36 days• hand-shelled• weight of 100 seed• placed in cold storage (320F) for 18 days• germination test at 770F• Seed stored at room temperature (20
days)• Germination test at 680F
Germination Tests
• Growth chamber• Dark conditions• Two constant temperatures
– 680 and 770 F– 2 runs
• Petri dishes• 2 layers of filter paper• 10 seeds/dish• 10 mls of tap water• 7 days
Results
Georgia Green Yield Response to Cadre(1.44 ozs/A + Agrioil @ 1% v/v)
48285016
47335065
44514619
5301
48345205
0
1000
2000
3000
4000
5000
6000
Untreat
ed
8 DAP
14 D
AP
22 D
AP
27 D
AP
34 D
AP
41 D
AP
47 D
AP
56 D
AP
Timing
lbs/
A
P = 0.4515CV = 11.21
PE-11-04Attapulgus
Influence of Cadre on Georgia Green Seed Size(1.44 ozs/A + Agrioil @ 1% v/v)
5861
57 59 57 56 57 58 58
0
15
30
45
60
75
Untreat
ed
8 DAP
14 D
AP
22 D
AP
27 D
AP
34 D
AP
41 D
AP
47 D
AP
56 D
AP
Timing
g/10
0 se
ed
P = 0.0921CV = 3.81
PE-11-04Attapulgus
Influence of Cadre on Georgia Green Seed Germination (770F- 7 days)
(1.44 ozs/A + Agrioil @ 1% v/v)
9487
9097
9399
9298
94
0
20
40
60
80
100
Untreat
ed
8 DAP
14 D
AP
22 D
AP
27 D
AP
34 D
AP
41 D
AP
47 D
AP
56 D
AP
Timing
% (
7 da
ys)
P = 0.08CV = 5.68
PE-11-04Attapulgus(average of 2 runs)54 day old seed
Influence of Cadre on Georgia Green Seed Germination (680F - 7 days)
(1.44 ozs/A + Agrioil @ 1% v/v)
8488
83
96
78
88 89 89
78
0
20
40
60
80
100
Untreat
ed
8 DAP
14 D
AP
22 D
AP
27 D
AP
34 D
AP
41 D
AP
47 D
AP
56 D
AP
Timing
% (
7 da
ys)
P = 0.1689CV = 9.2
PE-11-04Attapulgus(average of 2 runs)74 day old seed
Summary
• Cadre had no effect on …..– Yield– Seed size– seed
germination
2005 Research
• Cadre @ 1.44 ozs/A + COC @ 1% v/v
– 30 and 45 DAP
• 2,4-DB @ 1.1 pts/A + COC @ 1% v/v
– 75 and 95 DAP
• 3 peanut varieties
– GA Green, C99-R, GA – 01R
• 2 locations in Georgia
• National Peanut Board Funding
www.gaweed.com