Author(s): K. C. TEJA, B. DUARY AND S. DASH

Abstract: A field experiment was conducted during the kharif season of 2014 and 2015 at the Agricultural Farm, Institute of Agriculture, Visva-Bharati, Sriniketan, West Bengal with rice variety MTU-7029 to study the effect of sole and combined application of herbicides on weed growth, productivity and economics of transplanted rice. The experiment was laid out in a randomized block design with three replications and eleven treatments. Results revealed that azimsulfuron at 35 g ha-1 + 2, 4-D at 500 g ha- 1 at 25 DAT effectively controlled the grasses, broad-leaved and sedges at 50 DAT which was statistically at par with the pretilachlor at 0.75 kg ha-1 + pyrazosulfuron-ethyl at 25 g ha-1 at 3 DAT. Weed competition resulted in 33-35% reduction in grain yield. Lower values of weed density and dry weight and higher values of weed control efficiency, herbicide efficiency index, rice grain yield, net return and return per rupee invested were registered with azimsulfuron at 35 g ha-1 + 2, 4-D at 500 g ha-1 at 25 DAT and was followed by pretilachlor at 0.75 kg ha-1 + pyrazosulfuron-ethyl at 25 g ha-1 at 3 DAT. These treatments may be recommended in transplanted kharif rice in the lateritic belt of West Bengal.

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