Efficacy of Imazethapyr in Controlling Weeds in Soybean (Glycine max (L.) Merrill)

A field experiment was conducted at the experimental farm of Himachal Pradesh Krishi Vishvavidyalaya, Palampur during kharif, 1990 and 1991. The study of weed dominance revealed that the highest percentage of total weed flora was constituted by Cyperus spp. (59.8%) during first year and Panicum dichotomiflorum (37.9%) during second year. Significantly lower dry matter and weed count were obtained with imazethapyr 200 g/ha (Pre-em.) and were at par with its pre-plant incorporation, hand weeding twice and imazethapyr 150 g/ha (Pre-em.) during both the years. The effective control of weeds with these treatments resulted in significantly higher seed yield and yield contributing characters of soybean.