1Department of Vegetable Crops, Haryana Agricultural University, Hisar-125 004.
Field experiments were conducted in autumn planted crop of potato cv. Kufri Chandramukhi to evaluate the comparative performance of six pre-emergence herbicides viz. Fluchloralin (0.75 & 1.0 kg/ha), pendimethalin (1.0 & 1.5 kg/ha), metribuzin (0.5 & 1.0 kg/ha), oxyfluorfen (0.1 & 0.2 kg/ha) oxadiazon (1.5 kg/ha) and alachlor (2.5 kg/ha); three post-emergence herbicides viz. nitrofen (1.5 kg/ha), paraquat (0.5 kg/ha) and bentazon (1.0 kg/ha) alongwith earthing-up plus one hand weeding, earthing-up plus two hand weedings, one hand weeding and two hand weedings with no earthing-up were compared with weedy check (no weeding). All the cultural as well as chemical weed control treatments significantly reduced the weed growth (number and dry weight of weeds) and increased tuber yield over weedy check (no weeding) during both the years. Maximum tuber yield (278.8 in 1979–80 & 266.3 q/ha in 1980–81) was obtained from the pre-emergence application of metribuzin at 1.0 kg/ha which was closely followed by oxyfluorfen at 0.2 kg/ha. Least yield of 173.3 and 148.8 q/ha during the two years was recorded from weed check.
