Abstract
A total of eight treatments were evaluated in a randomized block design (RBD) with three replications. The treatments consisted of pre-emergence application of pendimethalin (30.0% EC) at 1.0 kg/ha + 1 hoeing on 45 DAS, post-emergence application of quizalofop-ethyl 50 g/ha (30 DAS) + 1 hoeing, pendimethalin at 1.0 kg/ha fb quizalofop-ethyl 50 g/ha + 1 hoeing on 45 DAS, post-emergence application of pyrithiobac-sodium 62.5 g/ha (30 DAS) + 1 hoeing on 45 DAS, combination of pyrithiobac-sodium 62.5 g/ha + quizalofop-ethyl 50 g/ha + 1 hoeing on 45 DAS, glyphosate 1.0 kg/ha (45 DAS) as directed spray and control plots of weed free check and unweeded check. The results revealed that application of preemergence herbicide pendimethalin at 1.0 kg/ha at 3 DAS followed by post-emergence herbicide (quizalofop-ethyl 50 g/ha at 30 DAS) + one hoeing or combined post-emergence application of pyrithiobac-sodium + quizalofop-ethyl + one hoeing on 45 DAS recorded lesser weed population and weed dry weight and higher weed control efficiency with lower weed index. These treatments were also comparable with pre-emergence application of pendimethalin + 1 hoeing. Higher yield attributes, viz. number of sympodia per plant, number of bolls per plant and boll weight and seed cotton yield were also registered by these treatments. The yield reduction due to weeds accounted 44.8 and 80.3% during 201213 and 2013–14, respectively The economic analysis indicated that higher total income, net income and benefit-cost ratio were associated with pre-emergence application of pendimethalin followed by postemergence application of quizalofop-ethyl + one hoeing, combined post-emergence application of pyrithiobac-sodium + quizalofop-ethyl + one hoeing and pre-emergence application of pendimethalin + 1 hoeing in both the years of study.
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Claims 9
Claim · model-written summary
Pendimethalin followed by quizalofop-ethyl and hoeing reduced weed population and dry weight and improved weed control efficiency.
- Taxon
- Bt cottont0
- Treatment
- pendimethalin at 1.0 kg/ha at 3 DAS followed by post-emergence herbicide (quizalofop-ethyl 50 g/ha at 30 DAS) + one hoeinge0
- Interactor
- weedst0weed
- Outcome
- weed population and weed dry weight and higher weed control efficiencye0
- Direction
- lessere0
Not reportedComparator
Verbatim
e0“application of preemergence herbicide pendimethalin at 1.0 kg/ha at 3 DAS followed by post-emergence herbicide (quizalofop-ethyl 50 g/ha at 30 DAS) + one hoeing or combined post-emergence application of pyrithiobac-sodium + quizalofop-ethyl + one hoeing on 45 DAS recorded lesser weed population and weed dry weight and higher weed control efficiency”
t0“weeds, yield and economics of Bt cotton”
Claim · model-written summary
Combined pyrithiobac-sodium, quizalofop-ethyl and hoeing reduced weed population and dry weight and improved control efficiency.
- Taxon
- Bt cottont0
- Treatment
- combined post-emergence application of pyrithiobac-sodium + quizalofop-ethyl + one hoeing on 45 DASe0
- Interactor
- weedst0weed
- Outcome
- weed population and weed dry weight and higher weed control efficiencye0
- Direction
- lessere0
Not reportedComparator
Verbatim
e0“combined post-emergence application of pyrithiobac-sodium + quizalofop-ethyl + one hoeing on 45 DAS recorded lesser weed population and weed dry weight and higher weed control efficiency”
t0“weeds, yield and economics of Bt cotton”
Claim · model-written summary
The two herbicide regimes lowered weed index and were comparable to pendimethalin plus hoeing.
- Taxon
- Bt cottont0
- Interactor
- weedst0weed
- Outcome
- comparablee0
- Comparator
- pre-emergence application of pendimethalin + 1 hoeinge0
Not reportedDirection
Verbatim
e0“These treatments were also comparable with pre-emergence application of pendimethalin + 1 hoeing”
t0“weeds, yield and economics of Bt cotton”
Claim · model-written summary
The effective treatments increased sympodia, boll number, boll weight and seed cotton yield.
- Taxon
- Bt cottont0
- Treatment
- these treatmentse0
- Outcome
- number of sympodia per plant, number of bolls per plant and boll weighte0
- Direction
- Highere0
Not reportedComparator
Verbatim
e0“Higher yield attributes, viz. number of sympodia per plant, number of bolls per plant and boll weight and seed cotton yield were also registered by these treatments”
t0“Bt cotton”
Claim · model-written summary
Weeds reduced cotton yield by 44.8% in 201213.
Verbatim
e0“yield reduction due to weeds accounted 44.8 and 80.3% during 201213 and 2013–14, respectively”
t0“Bt cotton”
Claim · model-written summary
Weeds reduced cotton yield by 80.3% in 2013–14.
Verbatim
e0“yield reduction due to weeds accounted 44.8 and 80.3% during 201213 and 2013–14, respectively”
t0“Bt cotton”
Claim · model-written summary
Pendimethalin followed by quizalofop-ethyl and hoeing yielded higher total income, net income and benefit-cost ratio.
Verbatim
e0“higher total income, net income and benefit-cost ratio were associated with pre-emergence application of pendimethalin followed by postemergence application of quizalofop-ethyl + one hoeing”
t0“Bt cotton”
Claim · model-written summary
Combined pyrithiobac-sodium, quizalofop-ethyl and hoeing yielded higher total income, net income and benefit-cost ratio.
Verbatim
e0“higher total income, net income and benefit-cost ratio were associated with pre-emergence application of pendimethalin followed by postemergence application of quizalofop-ethyl + one hoeing, combined post-emergence application of pyrithiobac-sodium + quizalofop-ethyl + one hoeing and pre-emergence application of pendimethalin + 1 hoeing”
t0“Bt cotton”
Claim · model-written summary
Pendimethalin plus hoeing yielded higher total income, net income and benefit-cost ratio.
Verbatim
e0“higher total income, net income and benefit-cost ratio were associated with pre-emergence application of pendimethalin followed by postemergence application of quizalofop-ethyl + one hoeing, combined post-emergence application of pyrithiobac-sodium + quizalofop-ethyl + one hoeing and pre-emergence application of pendimethalin + 1 hoeing”
t0“Bt cotton”
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