First 40 days are critical for crop-weed competition. So weeds should be controlled at 30 days after transplanting with the help of hand rotary or Japanese paddy weeder. Weeding should be done before top dressing of N fertilizers. For chemical weed control, Benthiocarb or Butachlor @ 1 to 1.25 kg a.i./ha or Pendimithalin @ 1.0 kg/ha in 500 liters of water should be sprayed as pre-emergence or broadcasted by mixing with 100 kg sand after 8-10 days of transplanting. Boradcasting of weedicide should be done only if the water is stagnated in the filed. The field should not be disturbed for 10-15 days after applying the weedicide. Hand weeding should be carried at 30 days of transplanting.