Abstract
The efficacy of some potent herbicides of sulfonylurea group in conjunction with other traditional recommended herbicides was studied in wet direct- sown summer rice (Oryza sativa) during the dry season of 2005 and 2006 at Cuttack, Orissa. The major weed flora found during the crop growing season were Echinochloa colona (9.6%), Cyperus difformis (21.9%), Fimbristylis miliacea (19.2%), Sphenochlea zeylanica (23.3%), and Ludwigia parviflora (26.0%) at 30 days after sowing (DAS). Bensulfuron methyl (60 g ha−1) applied at 20 DAS was found to be the most effective herbicide in controlling weeds (weed control efficiency 95.2%) and maximizing rice grain yield (5.82 t ha−1). This was at par with hand weeding twice at 20 and 40 DAS in terms of weed control efficiency and grain yield. Other herbicides of sulfonylurea group viz., pyrazosulfuron ethyl (25 g ha−1) applied at 10 DAS, triasulfuran (9 g ha−1) applied at 7 DAS and Almix (metsulfuron methyl + chlorimuron ethyl) + 0.2% surfactant (4 g ha−1) applied at 20 DAS also showed good suppression of weeds with weed control efficiency (WCE) 93.4, 91.7 and 88.6%, respectively. Among the traditional recommended herbicides, pretilachlor + safener (750 g ha−1) performed relatively better with WCE 85.0%. There was more than 46% reduction in the grain yield of rice due to competition with weeds in weedy plots
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Claims 8
Claim · model-written summary
Bensulfuron methyl gave 95.2% weed control efficiency, the highest among tested herbicides.
- Taxon
- rice
Oryza sativat0 - Treatment
- Bensulfuron methyl (60 g ha−1) applied at 20 DASe0
- Outcome
- weed control efficiencye0
- Direction
- most effectivee0
- Value
- 95.2%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“Bensulfuron methyl (60 g ha−1) applied at 20 DAS was found to be the most effective herbicide in controlling weeds (weed control efficiency 95.2%)”
Claim · model-written summary
Bensulfuron methyl maximized rice grain yield at 5.82 t ha−1.
- Taxon
- riceOryza sativat0
- Treatment
- Bensulfuron methyl (60 g ha−1)e1
- Outcome
- rice grain yielde0
- Direction
- maximizinge0
- Value
- 5.82 t ha−1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“maximizing rice grain yield (5.82 t ha−1)”
e1“Bensulfuron methyl (60 g ha−1) applied at 20 DAS”
Claim · model-written summary
Bensulfuron methyl was at par with twice hand weeding for weed control and grain yield.
- Taxon
- riceOryza sativat0
- Outcome
- weed control efficiency and grain yielde0
- Direction
- at pare0
- Comparator
- hand weeding twice at 20 and 40 DASe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“This was at par with hand weeding twice at 20 and 40 DAS in terms of weed control efficiency and grain yield”
Claim · model-written summary
Pyrazosulfuron ethyl achieved 93.4% weed control efficiency.
- Taxon
- riceOryza sativat0
- Treatment
- pyrazosulfuron ethyl (25 g ha−1) applied at 10 DASe0
- Outcome
- weed control efficiency (WCE)e0
- Direction
- good suppressione0
- Value
- 93.4e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“pyrazosulfuron ethyl (25 g ha−1) applied at 10 DAS, triasulfuran (9 g ha−1) applied at 7 DAS and Almix (metsulfuron methyl + chlorimuron ethyl) + 0.2% surfactant (4 g ha−1) applied at 20 DAS also showed good suppression of weeds with weed control efficiency (WCE) 93.4, 91.7 and 88.6%, respectively”
Claim · model-written summary
Triasulfuran achieved 91.7% weed control efficiency.
- Taxon
- riceOryza sativat0
- Treatment
- triasulfuran (9 g ha−1) applied at 7 DASe0
- Outcome
- weed control efficiency (WCE)e0
- Direction
- good suppressione0
- Value
- 91.7e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“pyrazosulfuron ethyl (25 g ha−1) applied at 10 DAS, triasulfuran (9 g ha−1) applied at 7 DAS and Almix (metsulfuron methyl + chlorimuron ethyl) + 0.2% surfactant (4 g ha−1) applied at 20 DAS also showed good suppression of weeds with weed control efficiency (WCE) 93.4, 91.7 and 88.6%, respectively”
Claim · model-written summary
Almix plus surfactant achieved 88.6% weed control efficiency.
- Taxon
- riceOryza sativat0
- Treatment
- Almix (metsulfuron methyl + chlorimuron ethyl) + 0.2% surfactant (4 g ha−1) applied at 20 DASe0
- Outcome
- weed control efficiency (WCE)e0
- Direction
- good suppressione0
- Value
- 88.6%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“pyrazosulfuron ethyl (25 g ha−1) applied at 10 DAS, triasulfuran (9 g ha−1) applied at 7 DAS and Almix (metsulfuron methyl + chlorimuron ethyl) + 0.2% surfactant (4 g ha−1) applied at 20 DAS also showed good suppression of weeds with weed control efficiency (WCE) 93.4, 91.7 and 88.6%, respectively”
Claim · model-written summary
Pretilachlor plus safener gave 85.0% weed control efficiency.
- Taxon
- riceOryza sativat0
- Treatment
- pretilachlor + safener (750 g ha−1)e0
- Outcome
- WCEe0
- Direction
- relatively bettere0
- Value
- 85.0%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“pretilachlor + safener (750 g ha−1) performed relatively better with WCE 85.0%”
Claim · model-written summary
Weed competition reduced rice grain yield by more than 46% in weedy plots.
- Taxon
- riceOryza sativae0
- Interactor
- weedse0weed
- Outcome
- grain yield of ricee0
- Direction
- reductione0
- Value
- more than 46%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more than 46% reduction in the grain yield of rice due to competition with weeds in weedy plots”
The same questions in other papers
Pretilachlor · weed · Oryza sativa (rice)Results differ
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- negative
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See all 66 papers →methyl · weed · Oryza sativa (rice)Results agree
28 papers in the same direction as this paper
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See all 29 papers →chlorimuron-ethyl · weed · Oryza sativa (rice)Results agree
29 papers in the same direction as this paper
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See all 30 papers →metsulfuron methyl · weed · Oryza sativa (rice)Results agree
42 papers in the same direction as this paper
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See all 43 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.