Indian Journal of Agronomy

A field experiment was conducted during the rainy season of 2001 and 2002 at Sehore, to study the effect of herbicidal weed control on growth, yield and economics of soybean [Glycine max (L.) Merr.]. Application of imazethapyr 10% @ 75 g/ha was found most effective in reducing weed biomass and resulting higher weed-control efficiency over other pre- and post-emergence herbicides. Quizalofop ethyl 5 EC @ 50 g/ha was also found effective with fairly low weed shoot biomass during both the years and controlled particularly the monocot weeds effectively. Treatment of 2 hand-weedings recorded higher values for growth, yield attributes, harvest index and yield followed by post-emergence application of imazethapyr 10% @ 75 g/ha.