Abstract
Field experiments were conducted during Kharif 2012 and 2013 to evaluate the efficacy of different herbicides for weed management in cotton. Highest seed cotton yield (3537.3 kg ha(-1)) was recorded in weed free plots followed by pendimethalin @1.0 kg a.i ha(-1) as Pre.em.+quizalofopethyl @50 g a.i ha(-1) post-em at 2-4 weed leaf stage + one hoeing (3318.9 kg ha") owing to improved number of bolls per plant and boll weight. Statistically least yield was recorded underweedy check (1435.4 kg ha(-1)). Application of pyrithiobac sodium could not express any visible toxic effect on crop indicating its selectivity for cotton, although none of the tested new chemicals i.e., pyrithiobac sodium@ 62.5g a.i ha(-1) and quizalofopethyl @50g a.i ha(-1) when applied alone could not outperform the existing recommended chemicals for weed management. Yield losses to the extent of 6.2-59.4% were recorded due to weed competition. Weed control efficiency (WCE) was highest under weed free check (86.8%) followed by pendimethalin @1.0 kg a.i ha(-1) as Pre. em.+quizalofopethyl @50g a.i ha(-1), at 2-4 weed leaf stage + one hoeing (73.7%), whereas minimum values were for weedy check (24.7%). Though net returns (r94660 ha(-1)) were highest for weed free check but higher B:C ratio (2:11) was observed for pendimethalin @1.0 kg a.i ha(-1) as Pre em.+quizalofopethyl @50 g a.i ha(-1) post-em at 2-4 weed leaf stage+one hoeing. Therefore, for reasons such as labor shortage besides their timely availability, using these herbicides in combination with cultural practices could be the practical solution foreconomically efficient and effective weed management.
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Claims 14
Claim · model-written summary
Weed-free plots had the highest seed cotton yield at 3537.3 kg ha(-1).
Verbatim
e0“Highest seed cotton yield (3537.3 kg ha(-1)) was recorded in weed free plots”
t0“Bt cotton”
Claim · model-written summary
Pendimethalin plus quizalofopethyl and one hoeing yielded 3318.9 kg ha, following weed-free plots.
Verbatim
e0“pendimethalin @1.0 kg a.i ha(-1) as Pre.em.+quizalofopethyl @50 g a.i ha(-1) post-em at 2-4 weed leaf stage + one hoeing (3318.9 kg ha")”
t0“Bt cotton”
Claim · model-written summary
The weedy check produced the statistically lowest yield, 1435.4 kg ha(-1).
Verbatim
e0“Statistically least yield was recorded underweedy check (1435.4 kg ha(-1))”
t0“Bt cotton”
Claim · model-written summary
The combined herbicide and hoeing treatment improved boll number and boll weight.
Verbatim
e0“owing to improved number of bolls per plant and boll weight”
t0“Bt cotton”
Claim · model-written summary
Pyrithiobac sodium caused no visible crop toxicity.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- pyrithiobac sodiume0
- Outcome
- visible toxic effect on crope0
- Direction
- could not expresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of pyrithiobac sodium could not express any visible toxic effect on crop indicating its selectivity for cotton”
t0“Bt cotton”
Claim · model-written summary
Pyrithiobac sodium alone did not outperform recommended weed management chemicals.
Verbatim
e0“pyrithiobac sodium@ 62.5g a.i ha(-1) and quizalofopethyl @50g a.i ha(-1) when applied alone could not outperform the existing recommended chemicals for weed management”
t0“Bt cotton”
Claim · model-written summary
Quizalofopethyl alone did not outperform recommended weed management chemicals.
Verbatim
e0“pyrithiobac sodium@ 62.5g a.i ha(-1) and quizalofopethyl @50g a.i ha(-1) when applied alone could not outperform the existing recommended chemicals for weed management”
t0“Bt cotton”
Claim · model-written summary
Weed competition caused yield losses of 6.2-59.4%.
Verbatim
e0“Yield losses to the extent of 6.2-59.4% were recorded due to weed competition”
t0“Bt cotton”
Claim · model-written summary
Weed-free plots had the highest weed control efficiency at 86.8%.
Verbatim
e0“Weed control efficiency (WCE) was highest under weed free check (86.8%)”
t0“Bt cotton”
Claim · model-written summary
The combined herbicide and hoeing treatment had 73.7% weed control efficiency.
Verbatim
e0“pendimethalin @1.0 kg a.i ha(-1) as Pre. em.+quizalofopethyl @50g a.i ha(-1), at 2-4 weed leaf stage + one hoeing (73.7%)”
e1“Weed control efficiency (WCE) was highest under weed free check”
t0“Bt cotton”
Claim · model-written summary
The weedy check had minimum weed control efficiency of 24.7%.
Verbatim
e0“minimum values were for weedy check (24.7%)”
e1“Weed control efficiency (WCE)”
t0“Bt cotton”
Claim · model-written summary
Weed-free plots produced the highest net returns, r94660 ha(-1).
Verbatim
e0“net returns (r94660 ha(-1)) were highest for weed free check”
t0“Bt cotton”
Claim · model-written summary
The combined herbicide and hoeing treatment gave a higher B:C ratio of 2:11.
Verbatim
e0“higher B:C ratio (2:11) was observed for pendimethalin @1.0 kg a.i ha(-1) as Pre em.+quizalofopethyl @50 g a.i ha(-1) post-em at 2-4 weed leaf stage+one hoeing”
t0“Bt cotton”
Claim · model-written summary
The authors recommend combining herbicides and cultural practices for economical and effective weed management amid labor shortages.
Verbatim
e0“using these herbicides in combination with cultural practices could be the practical solution foreconomically efficient and effective weed management”
t0“Bt cotton”
The same questions in other papers
quizalofop-ethyl · weed · Gossypium hirsutum (cotton)Positive and negative results
9 reporting no difference from an alternative
- positive
- positive
- positive
6 papers more in this group
See all 10 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.