A field experiment was carried out to study the effect of doses and stage of application of various herbicides namely sulfosulfuron, isoproturon and metribuzin during rabi 2003-04 and 2004-05 at Pantnagar. All the herbicides reduced dry matter of weeds at 60 days more effectively when they were applied at higher rates and after first irrigation. Annual weeds and total weeds were higher in conventional tillage than zero tillage under weedy situation while perennial weeds were more in zero tillage. Under zero tillage, sulfosulfuron at 25 g/ha after first irrigation recorded highest grain yield viz., 4431 kg/ha and 3924 kg/ha during 2003-04 and 2004-05, respectively. Weed control efficiency (94% during both experimental years) too was highest in this treatment. However, two hand weeding at 30 and 45 days stage under conventional tillage recorded highest yield among all the treatments. Use of herbicides under zero tillage fetched higher net returns than hand weeding at 30 and 45 days after sowing.