Author(s):

Madhab Kumar Datta, Pronobesh Halder, Utpal Biswas and Champak Kumar Kundu

Abstract:
A field experiment was conducted during pre-kharif season of 2010 and 2011 at the C-Block Farm of Bidhan Chandra Krishi Viswavidyalaya, Kalyani to find out the effect of different weed management practices on weed growth and soil microbes of jute (cv. JRO-524). The experiment was designed with eight treatments (weed management practices) and tested under Randomized Block Design with three replications. The weed management practices comprised of different doses of chemical herbicides like Fenoxaprop-P-Ethyl and Quizalofop-Ethyl as post emergence spray at 30 DAS; botanical herbicides like Calotropis and Parthenium (5% raw extract) as pre emergence spray at 1 DAS in combination with hand weeding. The lowest weed density, weed dry weight was recorded in hand weeding twice at 15 and 30 DAS closely followed by Quizalofop-Ethyl @ 100 g ha^-1 at 30 DAS + Hand weeding at15 DAS. In successive years also, the highest weed control efficiency and fibre yield was found in hand weeding twice at 15 and 30 DAS which was at par with Quizalofop-Ethyl @100 g ha^-1 at 30 DAS + Hand weeding at15 DAS. Maximum population of soil micro flora was found in the Quizalofop-Ethyl @ 100 g ha^-1 at 30 DAS + Hand weeding at 15 DAS at the harvest stage of crop. From the present experiment, it can be concluded that the spraying of Quizalofop-Ethyl @ 100 g ha^-1 at 30 DAS + Hand weeding at 15 DAS would be beneficial practice to the jute farmer of West Bengal.

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