Growth attributes, Herbicides, Integrated weed management, Transplanted rice, Yield

The present study was carried out during Kharif season of 2012 at G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand. The dominant weed flora observed in the experimental plots were Echinochloa colona, E. crus-galli, Leptochloa chinensis, Ischaemum rugosum among grasses and Ammania baccifera, Alternanthra sessilis and Caesulia axillaris among broad-leaf weeds and Cyperus difformis among the sedges. Grasses were the most dominant weeds which occupied more than 60% of SDR followed by broad-leaved weeds (27.7%) and sedges (12.2%). Pre-emergence application of pretilachlor at 0.75 kg/ha with no irrigation up to one week fb PoE application of bispyribac-Na at 20 g/ha was the most promising treatment which recorded higher rice grain and straw yield as compared to other weed control treatments.