Department of Agronomy, G. B. Pant University of Agriculture & Technology, Pantnagar-263 145 (Uttaranchal), India.
Higher weed density and population of Phalaris minor were recorded in conventional tillage than zero tillage. Pre-sowing paraquat application had marked effect on weed growth in zero tillage. Maximum reduction in weed density was obtained with the application of 2, 4–0 and isoproturon (500 g+1000 g ha−1) as mixture under ZT and CT system. Higher average grain yield was achieved under zero tillage wheat with pre-sowing paraquat (500 g ha−1) application and post-emergence isoproturon (1000 g ha−1) or mixed application of 2, 4–0 and isoproturon (500 g+ I000 g ha−1). Yield achieved in zero tillage without any herbicide application was comparable to conventional tillage with isoproturon application.
