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BYRANJINI THOMASID NO:ALS:OO49

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INTEGRATED WEED

MANAGEMENT? It involves the utilization and

o!"ination o# physical $chemical, biologicalandcultural !ethods o# %eed

ont&ol in a %ell 'lannedse(uene so desi)ned as notto a*et the eos+ste!,

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Weed flora varies from place to placedue to type of rice culture, soil type

hydrology, tillage, cultural practices

and irrigation pattern etc.Grasses are dominant in irrigated

systemsSedges are dominant in rainfed system

Weed problems are more severe inirrigated rice fields due to rotation at

pattern of water issues

.

Weed management in rice

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Nearly 134 weed species identified

from rice field belongs to 3 ta!onomicfamilies

"ore than #$ species % grasses

"ore than &$ species % sedges"ore than $ species % broad leaves

'owever 1$%$ species may be

considered as economically important

in rice culture Grasses are considered

as the ma(or weed group in rice fields.

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IWM !R RI"ES#$N!

S"IENTII" NAME ENG#ISHNAME

"!MM!NNAME

- Echinocloa colonum .ild &ie /hotta sa%an0

1 Echinocloa crusgualli Ba&n+a&d )&ass sa%an0

2 Cyperus rotundus 3u&'le nutsed)e

!otha

4 Cyperus irri Yello% sed)e /hhat&i%ala dila

Cyperus difformis /o!!on sed)e Motha

5 Eclipta alba 6alse dais+ Jal "han)&a

7 Celosia argentia /o08s o!" /hil!il$sa&ai

Dactylotenium aegypticum /&o%#oot )&ass !a0&a

9 Setaria glauca /attail !illet La'tana$"an&a

- Scripus spp, /lu" &ushes ;

-- Panicum spp. ; ;-1 Pas alam s .

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GRASSES SEDGES DI"!TS

-,

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colonumEchinocloa colonum

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9/51Echinocloa crussgulli

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10/51Echinocloa glabrescens

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Ageratum conyzoides

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Amaranthusspinosus

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Cyperusdifformis

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Cyperus irria

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Ischaemum rugosum

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Fimbristylis miliaceae

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RI"ERI"E It is )&o%n in u'land$ !idland and

lo%land &e)ions,

The %eed intensit+ is !o&e in u'land'add+ as o!'a&ed to lo%land and!idland 'add+,

/RITI/AL 3&st 2=2 da+s in t&ans'lanted &o' and u'to 5 da+s in di&et seeded &o's,

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.

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Used are:

Butachlor@ 1.5 kg a.i/ha as pre-emergent

spray at 3-4 days o paddy crop.!endimethalin@ 3 lit a.i/ha as pre-

emergent spray her"icide at 4 #$%.

$nilophos@ &.5 lit a.i/ha at 3-4 #$%'(4-# )thyl esters or '(4-# sodium salts as

pre-emergent her"icide at 35-4& #$* @ 1.5

kg a.i/ha.!ropanil @ 3 lit a.i/ha as post-emergent.

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-ransplanted paddy

Herbicide name Quantity

(acre)

Time of

application

How to use

Butachlor 50ECgranules

Butachlor 5 %

Pendimethalin 30EC

Anilophos 30 EC

2,4 D 4%!

Butachlor 5 % "2,4 D 4%!

#$0 lit$

#2 g

2$5 lit

& lit

'$0 g

4$0 g " 4$0 g

5 DA( )i* +ith 2530g sand andspread o-er the

.ield$ At the timeo. spreading light+ater standing ismust$

4/ hr a.ter

application o.+eedcide dontallo+ +aterinside$

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0irect seeded rice

Herbicide name Quantity(acre)

Time ofapplication

How to use

Pretilachlor 30 EC" 1a.ener

Butachlor 50EC

Anilophos

400ml

#$0 lit$

500 ml

3 5 DA1 )i* +ith 300 lito. +ater andspread o-er the.ield$ At the timeo. application soilshould e

moisture

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+eeder in paddy

*u"mergence method

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.H

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oLathyrus sppo

Cirsium ulgare,%,$ !)0#: %he initial 4& #$*.+))# ,0%0 2)%0#*:

1.and eeding: at '& 4& #$*.

'.nterculture: at '&(35 and 6& #$*.

3.,hemical method: soproturon as early

post-emergent spray @ &.75 a.i/ha at 3&

#$* or 2eta8uron @ 1 kg a.i/ha or '(4-# at45-5& #$* @ 1 kg a.i/ha or !endimethalin

@ 1 kg a.i/ha.

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+2 in heat

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Phalaris minor

Aena fatua9ild oats Chenopodiumalbum

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Cirsium vulgare

Lathyrusspecies

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+eeds in heat ield

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)soproturon-control "road

lea;ed eeds and grasses

0elpower-control most

o the grass eeds

-ribenuron-control"road lea;ed eeds in

heat

SN+-control o "road lea;ed

eeds in heat( "arley and oats

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,hemical method o eed control in heat

ound to increase the yield "y '&eld a&e:

oAmaranthus viridis

o Commelina benghalensis

o Dactyloctenium aegypticum

o

Cynodon dactylon("e&!uda )&ass)o Borreria hispida(Button %eed

"RITI"A# %ERI!D:>&st 1=2 DAS,

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ommon weeds in mai5e

Amaranthus iridis Borreria hispida

Cynodon dactylon

Dactyloctenium aegypticum

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WEED "!NTR!#METH!DS

-, Hand %eedin): at 1=2 DAS,

1, Inte&ultu&e:

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*uccessul eed management in

mai=e

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SOREHFM

The o!!on %eed o# So&)hu! is St&i)aG.ith %eed,

The di*e&ent s'eies a&e: StrigaherrmoticaStriga denti!ora Striga cernua,

.

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Di*e&ent s'eies o# St&i)a

Striga asiatica Striga bilabiata Striga hermotica

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*triga eed eect in *orghum ield

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+))# ,0%0

2)%0#*:1.and eeding: at '&-'5 #$*.

'.nterculture : oeing at '& 45

#$*.

3. ,hemical method :$tra=ine(

*ima=ine @ &.75at &.75 kg a.i/haas a pre emergent spray.

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/ONTROL O6 STRIEA

Mehanial 'ullin): .hen so&)hu!&o' is a&ound 5 da+s St&i)a attainsthe sta)e o# o%e&in),

6&e(uent i&&i)ation:St&i)a an8t%ithstand hi)h !oistu&e ondition inthe >eld, The+ %ill %ilt and die,

/he!ial !ethod:1$4=D 10) a,iChaat 2=4 DAS,

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,rop rotation: groing copea( cotton(

Bengal gram or '-3 years.

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BAJRA

Should "e 0e't %eed #&ee #o& >&st 1=2 DAS,

.

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+2 practices in "a>ra-eeds are

not alloed to gro or '5 to 3&

days.

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RAEI

Should "e 0e't %eed #&ee #o& >&st 2 DAS,

.

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-ransplanted ragi

Herbicide name Quantity (acre) Time ofapplication

How to use

Butachlor 50EC '00 ml 3 5 DA( )i* +ith 300 lit o.+ater and spread o-erthe .ield$ At the timeo. application soilshould e moisture

0rill sown ragi

Herbicide name Quantity(acre)

Time ofapplication

How to use

soproturon 5 % P 300 g 3 5 DA1 )i* +ith 300 lit o.+ater and spread o-erthe .ield$ At the timeo. application soilshould e moisture

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+eed -ree ragi ield- hand eeding and hoeing practices

+N6S)+N

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%he nature and intensity o species to "e controlled (

the se?uence o crops that are raised in the rotation (

the standard o crop hus"andry ( the ready and timely

a;aila"ility o any method and the economics o the

dierent eed control methods are some o the potent

consideration that determine the successul e8ploitation

o the integrated eed control approach

A& i&tegrate' (ee'co&trol approach is asure (ay o)mi&imi*i&g theresi'ue problems i&pla&t , soil , air a&'

(ater$

+N6S)+N

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2uture weed control machine%use

of sensors

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