Abstract
AbstractFarmers are preferring direct-seeded rice (DSR) than traditional transplanted rice cultivation practices due to water scarcity and agricultural labors shortage. However, weeds are a major challenge in DSR production systems. A field experiment was conducted at the Research farm of Bidhan Chandra Krishi Vishwavidyalaya, West Bengal, India ((22°97' N, 88°44' E, and 9.75 m above MSL) during Kharif seasons of 2022 and 2023 to evaluate the efficacy of varying doses of carfentrazone-ethyl in comparison with oxyfluorfen and hand weeding on diversified weed flora and assess their effect on growth, nutrient uptake and yield of direct-seeded rice for identifying a suitable herbicide and its optimum dose for sustainable direct-seeded rice production. There were seven treatments, viz. four doses of carfentrazone-ethyl 40% DF (carfentrazone-ethyl) 15, 20, 25 and 30 g/ha; oxyfluorfen 23.5% EC (oxyfluorfen) 240 g/ha; hand weeding twice at 20 and 40 days after seeding (DAS) and weedy check. A randomized complete block design replicated thrice was used. Among the tested herbicides, carfentrazone-ethyl 30 g/ha effectively reduced the total weed density by 55.08% and 53.83% at 30 and 45 days after seeding (DAS), respectively and biomass of broad-leaved weeds and annual sedges by 81.22% and 77.31% at 30 and 45 DAS, respectively, compared to control. The carfentrazone-ethyl 30 g/ha recorded highest rice grain yield too and may be considered as the best treatment for managing weeds, particularly when the broad-leaved weeds and sedges are predominant, in direct-seeded rice.
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Claims 6
Claim · model-written summary
Carfentrazone-ethyl at 30 g/ha reduced total weed density by 55.08% at 30 DAS relative to control.
Verbatim
e0“carfentrazone-ethyl 30 g/ha effectively reduced the total weed density by 55.08% and 53.83% at 30 and 45 days after seeding (DAS), respectively and biomass of broad-leaved weeds and annual sedges by 81.22% and 77.31% at 30 and 45 DAS, respectively, compared to control”
t0“direct-seeded rice”
Claim · model-written summary
Carfentrazone-ethyl at 30 g/ha reduced total weed density by 53.83% at 45 DAS relative to control.
Verbatim
e0“carfentrazone-ethyl 30 g/ha effectively reduced the total weed density by 55.08% and 53.83% at 30 and 45 days after seeding (DAS), respectively and biomass of broad-leaved weeds and annual sedges by 81.22% and 77.31% at 30 and 45 DAS, respectively, compared to control”
t0“direct-seeded rice”
Claim · model-written summary
Carfentrazone-ethyl at 30 g/ha reduced broad-leaved weed and annual sedge biomass by 81.22% at 30 DAS relative to control.
Verbatim
e0“carfentrazone-ethyl 30 g/ha effectively reduced the total weed density by 55.08% and 53.83% at 30 and 45 days after seeding (DAS), respectively and biomass of broad-leaved weeds and annual sedges by 81.22% and 77.31% at 30 and 45 DAS, respectively, compared to control”
t0“direct-seeded rice”
Claim · model-written summary
Carfentrazone-ethyl at 30 g/ha reduced broad-leaved weed and annual sedge biomass by 77.31% at 45 DAS relative to control.
Verbatim
e0“carfentrazone-ethyl 30 g/ha effectively reduced the total weed density by 55.08% and 53.83% at 30 and 45 days after seeding (DAS), respectively and biomass of broad-leaved weeds and annual sedges by 81.22% and 77.31% at 30 and 45 DAS, respectively, compared to control”
t0“direct-seeded rice”
Claim · model-written summary
Carfentrazone-ethyl at 30 g/ha produced the highest rice grain yield.
- Taxon
- direct-seeded ricet0
- Treatment
- carfentrazone-ethyl 30 g/hae0
- Outcome
- rice grain yielde0
- Direction
- higheste0
Not reportedComparator
Verbatim
e0“The carfentrazone-ethyl 30 g/ha recorded highest rice grain yield too”
t0“direct-seeded rice”
Claim · model-written summary
The authors recommend carfentrazone-ethyl at 30 g/ha to manage weeds when broad-leaved weeds and sedges predominate.
Verbatim
e0“may be considered as the best treatment for managing weeds, particularly when the broad-leaved weeds and sedges are predominant, in direct-seeded rice”
The same questions in other papers
carfentrazone-ethyl · weed · Oryza sativa (rice)Results agree
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- positive
- positive
- positive
carfentrazone-ethyl · yield · Oryza sativa (rice)Results agree
3 papers in the same direction as this paper
- positive
- positive
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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.