Year: 2018 | Month: June | Volume 5 | Issue 1
Influenced of different Weed Management Practices for Higher Productivity of Jute (Corchorus olitorius) in West Bengal
Bikas Mandal and Dhiman Mukherjee
DOI:10.30954/2347-9655.01.2018.2
Abstract:
Jute, a principal crop in pre kharif season of West Bengal delta is predominantly a rainfed crop and is seriously affected by weeds and drastically reduced green biomass and fibre yields. A field experiment was conducted during the pre kharif season of 2015 and 2016 under randomized block design with ten treatments mainly pretilachlor 50% EC @500 ml/ha , pretilachlor 50% EC @1000 ml/ha, pretilachlor 50% EC @500 ml/ha + one hand weeding at 35 DAS, pretilachlor 50% EC @1000 ml/ha + one hand weeding at 35 DAS, nail weeder 1st at 10 DAS and 2nd at 20 DAS + one hand weeding (within the row) at 35 DAS, nail weeder 1st at 10 DAS + scrapper at 20 DAS + one hand weeding (within the row) at 35 DAS, quizalofop ethyl 5% EC @ 40 g/ha at 20 DAS + one hand weeding at 35 DAS, quizalofop ethyl 5% EC @ 60 g/ha at 20 DAS + one hand weeding at 35 DAS, weed free and un-weeded control. With various treatments, quizalofop ethyl 5% EC @ 40 g/ha at 20 DAS + one hand weeding at 35 DAS, nail weeder 1st at 10 DAS + scrapper at 20 DAS + one hand weeding (within the row) at 35 DAS, and pretilachlor 50% EC @1000 ml/ha + one hand weeding at 35 DAS, become very effective to control weed density and biomass throughout the growth phase of plant. Green biomass production with quizalofop ethyl 5% EC @ 60 g/ha at 20 DAS + one hand weeding at 35 DAS (664.18 q/ha) was significantly better to all other treatments except weed free situation (700.07 q/ha). These treatments record, 62.52 and 71.02 % more biomass over the unwedded check, respectively. Fiber yield was highest observed with weed free situation (38.86 q/ha), and was at par with quizalofop ethyl 5% EC @ 60 g/ha at 20 DAS + one hand weeding at 35 DAS (36.94 q/ha) and nail weeder 1st at 10 DAS + scrapper at 20 DAS + one hand weeding (within the row) at 35 DAS (34.55 q/ha). These treatments registered, 70.06, 61.16 and 51.20 % more yield over the control plot. Economics revealed that, highest net return (` 1,34,284) and B:C ratio (1.67) observed with the quizalofop ethyl 5% EC @ 60 g/ha at 20 DAS + one hand weeding at 35 DAS and was followed by pretilachlor 50% EC @1000 ml/ha. By adoption of above mentioned techniques the jute growers can earn more by reducing the cost of cultivation of jute.
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