Post-emergence application or triazolopyrimidine sulfonamide at 15 to 25 g ha" I applicd at 15 days after transplanting (DAT) was more effective in reducing the weed growth and increased crop growth, yield and yield components than pre-emergence herbicides (aniloros. butachlor and pretilachlor) and was on par with hand weeding done at 20 and 40 DAT.