Abstract
Aims: To identify the weed species in Bt cotton under Tunga-bhadra project command area and to study the effect of sequential application of pre- emergent (PE) and post- emergent herbicides (PoE) on weed growth and to know the efficiency of different weed control practices on weed species. Study Design: The experiment was laid in RBD (Randomized Block Design). Place and Duration of Study: The experiment was conducted at ICAR- Krishi Vigyan Kendra farm, UAS, Raichur situated in TBP command area during kharif season of 2018-19. Methodology: The design was RBD with 11 treatments and replicated thrice. Gross plot size of the field was 7.2 m × 4.8 m and net plot size was 5.4 m ×3.6 m with spacing of 90 x 30 cm. The certified seeds of Jadoo Bt II Cotton with the test weight of 6.5 g was used for sowing. The crop duration was around 6 month Results: Weed flora present in the Bt cotton field were identified and classified based on their morphology. It was divulged that; dicotyledonous weeds were dominant in cotton field. The sequential applications of metolachlor 50 % EC @ 1000 g a.i. ha-1 as PE fb pyrithiobac sodium 10 EC @ 125 g a.i. ha-1 as PoE @ 2-5 leaf stage of weeds fb Inter cultivation (IC) @ 60 DAS reported lower weed count and weed dry matter and reported the highest weed control efficiency (90.22 %) at harvest than the application of diuron 80 % WP as PE fb @ 1500 g a.i. and pendimethalin Pendimethalin 30 EC @ 1250 g a.i. ha-1 as PE followed by pyrithiobac sodium 10 EC @ 125 g a.i. ha-1 as PoE @ 2-5 leaf stage of weeds fb Inter cultivation (IC) @ 60 DAS. Conclusion: Application of pre-emergent followed by post emergent herbicides control the early and later flush of weeds. It avoids the emergence of broad spectrum weed flushes and weed shift. Integrated herbicidal application along with intercultural operations was found better in keeping weeds under a threshold than following a single method.
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Claims 7
Claim · model-written summary
Dicotyledonous weeds dominated the cotton field.
- Taxon
- cotton
Gossypium hirsutume0 - Interactor
- dicotyledonous weedse0weed
- Outcome
- dominante0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dicotyledonous weeds were dominant in cotton field”
Claim · model-written summary
The metolachlor, pyrithiobac and cultivation sequence yielded lower weed count.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- metolachlor 50 % EC @ 1000 g a.i. ha-1 as PE fb pyrithiobac sodium 10 EC @ 125 g a.i. ha-1 as PoE @ 2-5 leaf stage of weeds fb Inter cultivation (IC) @ 60 DASe0
- Interactor
- weedse0weed
- Outcome
- weed counte0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sequential applications of metolachlor 50 % EC @ 1000 g a.i. ha-1 as PE fb pyrithiobac sodium 10 EC @ 125 g a.i. ha-1 as PoE @ 2-5 leaf stage of weeds fb Inter cultivation (IC) @ 60 DAS reported lower weed count and weed dry matter”
e1“dicotyledonous weeds were dominant in cotton field”
Claim · model-written summary
The metolachlor, pyrithiobac and cultivation sequence yielded lower weed dry matter.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- metolachlor 50 % EC @ 1000 g a.i. ha-1 as PE fb pyrithiobac sodium 10 EC @ 125 g a.i. ha-1 as PoE @ 2-5 leaf stage of weeds fb Inter cultivation (IC) @ 60 DASe0
- Interactor
- weedse0weed
- Outcome
- weed dry mattere0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sequential applications of metolachlor 50 % EC @ 1000 g a.i. ha-1 as PE fb pyrithiobac sodium 10 EC @ 125 g a.i. ha-1 as PoE @ 2-5 leaf stage of weeds fb Inter cultivation (IC) @ 60 DAS reported lower weed count and weed dry matter”
e1“dicotyledonous weeds were dominant in cotton field”
Claim · model-written summary
The sequence had the highest weed control efficiency, 90.22% at harvest.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- metolachlor 50 % EC @ 1000 g a.i. ha-1 as PE fb pyrithiobac sodium 10 EC @ 125 g a.i. ha-1 as PoE @ 2-5 leaf stage of weeds fb Inter cultivation (IC) @ 60 DASe2
- Outcome
- weed control efficiencye0
- Direction
- higheste0
- Value
- 90.22 %e0
- Comparator
- diuron 80 % WP as PE fb @ 1500 g a.i.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reported the highest weed control efficiency (90.22 %) at harvest than the application of diuron 80 % WP as PE fb @ 1500 g a.i. and pendimethalin Pendimethalin 30 EC @ 1250 g a.i. ha-1 as PE followed by pyrithiobac sodium 10 EC @ 125 g a.i. ha-1 as PoE @ 2-5 leaf stage of weeds fb Inter cultivation (IC) @ 60 DAS”
t0“Bt Cotton”
e1“dicotyledonous weeds were dominant in cotton field”
e2“The sequential applications of metolachlor 50 % EC @ 1000 g a.i. ha-1 as PE fb pyrithiobac sodium 10 EC @ 125 g a.i. ha-1 as PoE @ 2-5 leaf stage of weeds fb Inter cultivation (IC) @ 60 DAS reported lower weed count and weed dry matter”
Claim · model-written summary
Sequential pre- and postemergence herbicides controlled early and later weed flushes.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- pre-emergent followed by post emergent herbicidese0
- Interactor
- weedse0weed
- Outcome
- early and later flush of weedse0
- Direction
- controle0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of pre-emergent followed by post emergent herbicides control the early and later flush of weeds”
e1“dicotyledonous weeds were dominant in cotton field”
Claim · model-written summary
Sequential application prevented broad weed flushes and weed shift.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- pre-emergent followed by post emergent herbicidese2
- Outcome
- emergence of broad spectrum weed flushes and weed shifte0
- Direction
- avoidse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It avoids the emergence of broad spectrum weed flushes and weed shift”
t0“Bt Cotton”
e1“dicotyledonous weeds were dominant in cotton field”
e2“Application of pre-emergent followed by post emergent herbicides control the early and later flush of weeds”
Claim · model-written summary
Integrated herbicide and intercultural operations kept weeds below a threshold better than one method.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- Integrated herbicidal application along with intercultural operationse0
- Interactor
- weedse0weed
- Outcome
- keeping weeds under a thresholde0
- Comparator
- a single methode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Integrated herbicidal application along with intercultural operations was found better in keeping weeds under a threshold than following a single method”
t0“Bt Cotton”
e1“dicotyledonous weeds were dominant in cotton field”
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See all 108 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.