EFFICACY OF DIFFERENT WEEDICIDES AS AFFECTED BY THEIR MODE OF APPLICATION IN WHEAT CROP

A study was conducted at arid zone research institute, dera ismail khan, pakistan during the year 2012-13 to find out the most effective method of herbicide application for controlling weeds in wheat crop. herbicides i.e. buctril super @ 750 ml ha^-1, puma super @ 1250 ml ha^-1 and buctril super @ 750 ml ha^-1 + puma super @ 1250 ml ha^- 1 were applied at first irrigation. these herbicides were also sprayed on moist field after first irrigation. the results revealed that buctril super + puma super spray suppressed weed density by 73.9 %, fresh weed weight by 72.4% and dry weed weight by 64.0%, respectively as compare to control. maximum (111) days taken to 50% heading were noted in control treatment. the application of buctril super + puma super delayed maturity to 161 days, produced tallest plants of 112cm, highest number of 3.0 tillers per plant, maximum spike length of 10.2cm, maximum 59.6 grains per spike, biomass yield 14.55 t ha^-1, heaviest grains weight (52g) and highest grain yield of 6081 kg ha^-1. buctril super in combination with puma super spray proved to be an efficient method than their application with irrigation water.