Abstract
A field experiment was conducted during the kharif (wet) season of 2013 at farmer's field of village Benuria, Sriniketan, Birbhum, West Bengal with rice variety 'Swarna' (MTU 7029) to study the effect of bensulfuron-methyl + pretilachlor and other herbicides on weed growth and productivity of wet season transplanted rice. The experiment comprising of twelve treatments was laid out in a randomized block design with three replications. From the experimental findings it revealed that rice was infested with the three categories of weeds viz. grassy, broadleaved and sedges. Cynodon dactylon, among the grasses; Fimbristylis miliacea, among the sedges and Ludwigia parviflora, among the broadleaved weeds were predominant throughout the cropping period. The experimental field was dominated by broadleaved weeds. Among the herbicides application of bensulfuron-methyl 0.6%+ -1 pretilachlor 6% at 60+600 g ha at 3 DAT registered the lower number as well as dry weight of grassy, broadleaved, sedge and -1 total weeds at 45 DAT but it was at par with bensulfuron-methyl 0.6%+ pretilachlor 6% at 90 + 900 and 120 +1200 g ha at 3 -1 DAT. Metsulfuron methyl + chlorimuron-ethyl (Almix) + azimsulfuron at 4+35 g ha at 15 DAT was also quite effective in controlling broad spectrum weeds. Lower values of weed density, total weed dry weight and weed index, higher values yield attributes and yield of rice, weed control efficiency, net return as well as return per rupee invested were registered with -1 application of bensulfuron-methyl 0.6%+ pretilachlor 6% at 60 + 600 g ha at 3 DAT and metsulfuron methyl + chlorimuron-1 ethyl (Almix) + azimsulfuron at 4+35 g ha at 15 DAT. The loss of grain yield of rice due to weed infestation was to the tune of -1 40%. Application of bensulfuron-methyl 0.6%+ pretilachlor 6% at 60+600 g ha at 3 DAT or metsulfuron methyl + chlorimuron-1 ethyl (Almix) + azimsulfuron at 4 + 35 g ha at 15 DAT appeared to be the most promising for managing weeds, obtaining higher yield and net return of transplanted kharif (wet) rice in the lateritic belt of West Bengal.
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Claims 5
Claim · model-written summary
Broadleaved weeds dominated the rice field.
Not reportedTaxon
Verbatim
e0“The experimental field was dominated by broadleaved weeds”
Claim · model-written summary
Bensulfuron-methyl plus pretilachlor at 60+600 g ha lowered weed number and dry weight at 45 DAT.
- Treatment
- bensulfuron-methyl 0.6%+ -1 pretilachlor 6% at 60+600 g ha at 3 DATe0
- Interactor
- weedse0weed
- Outcome
- number as well as dry weight of grassy, broadleaved, sedge and -1 total weedse0
- Direction
- lowere0
Not reportedTaxonComparator
Verbatim
e0“application of bensulfuron-methyl 0.6%+ -1 pretilachlor 6% at 60+600 g ha at 3 DAT registered the lower number as well as dry weight of grassy, broadleaved, sedge and -1 total weeds at 45 DAT”
Claim · model-written summary
Metsulfuron methyl plus chlorimuron-ethyl and azimsulfuron controlled a broad spectrum of weeds.
- Treatment
- Metsulfuron methyl + chlorimuron-ethyl (Almix) + azimsulfuron at 4+35 g ha at 15 DATe0
- Interactor
- weedse0weed
- Outcome
- broad spectrum weedse0
- Direction
- effectivee0
Not reportedTaxonComparator
Verbatim
e0“Metsulfuron methyl + chlorimuron-ethyl (Almix) + azimsulfuron at 4+35 g ha at 15 DAT was also quite effective in controlling broad spectrum weeds”
Claim · model-written summary
Weed infestation caused about 40% grain-yield loss in rice.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The loss of grain yield of rice due to weed infestation was to the tune of -1 40%”
Claim · model-written summary
The authors favored either bensulfuron-methyl plus pretilachlor or metsulfuron methyl plus chlorimuron-ethyl and azimsulfuron for weed control, yield, and net return.
- Taxon
- rice
Oryza sativae0 - Outcome
- managing weeds, obtaining higher yield and net returne0
- Setting
- West Bengale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of bensulfuron-methyl 0.6%+ pretilachlor 6% at 60+600 g ha at 3 DAT or metsulfuron methyl + chlorimuron-1 ethyl (Almix) + azimsulfuron at 4 + 35 g ha at 15 DAT appeared to be the most promising for managing weeds, obtaining higher yield and net return of transplanted kharif (wet) rice in the lateritic belt of West Bengal”
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