Email:
sandiptakumarsarkar16@gmail.com
Address:
Department of Agronomy, Bidhan Chandra Krishi Viswavidyalaya, Kalyani, West Bengal 741 235
B:C ratio, Chemical control, Economics, Hand weeding, Winter rice, Weed management
Hand weeding twice at 20 and 40 days after transplanting (DAT) gave best results in reducing both weed density and biomass and ultimately increased the grain (4.53 t/ha) and straw yield (5.80 t/ha). Next highest grain (4.20 t/ha) and straw yield (5.57 t/ha) was obtained with bensulfuron-methyl + pretilachlor (granules) 10 kg/ha as pre-emergence + one hand weeding at 40 DAT treatment followed by combined herbicidal treatment bensulfuron-methyl + pretilachlor (granules) 10 kg/ha as PE + bispyribac-sodium 25 g/ha as post emergent gave grain yield 4.17 t/ha and straw yield 5.53 t/ha. Considering the benefit: cost ratio, the highest value (1.92) was obtained with the performance of bensulfuron-methyl + pretilachlor as PE + metsulfuron-methyl + chlorimuron-ethyl as POE.