EFFICACY OF DIFFERENT POST EMERGENCE HERBICIDES IN CONTROLLING WEEDS IN WHEAT

A field experiment was conducted at the agronomic research area, department of agronomy, university of agriculture, faisalabad during winter season 2010-2011 to assess the efficacy of different post emergence herbicides to control weeds in wheat crop and their effect on crop yield. the experiment was arranged in a randomized complete block design (rcbd) and each treatment was repeated three times. herbicides of different companies were compared to know about their efficacy to control different weeds species grown in association with wheat crop. different post emergence herbicides such as isoproturon 500 wp @ 1000 g a.i.ha-1, isoproturon 500 wp @ 1000 g a.i.ha^-1, clodinafop + propargyl @ 45 g a.i. ha^-1, clodinafop propargyl @ 45 g a.i. ha^-1, bromoxynil + mcpa @ 500 g a.i. ha^-1, bromoxynil + mcpa @ 500 g lit a.i. ha^-1, bristal @ 125 g a.i. ha^-1, puma super @ 93.75 g a.i. ha^-1 were sprayed as post emergence herbicides including weedy control. all herbicidal treatments significantly reduced weeds population but level of efficacy was different for each herbicide. among all weed control treatments clodinafop propargyl @ 300 g a.i. ha^-1 effectively controlled weeds which caused increase in crop plant growth and yield. clodinafop propargyl @ 300 g a.i. ha^-1 gave the maximum net profit of rs. 105955 ha^-1. however, maximum mrr (%) of 3311 was obtained by applying clodinafop propargyl @ 300 g a.i. ha^-1 followed by bristal @ 1.25 lit a.i. ha^-1 with the mrr (%) of 1480.