Abstract
Investigation pertaining to the efficacy of tribunil herbicide at various concentrations with and without a surfactant for the control of wheat weeds was carried out at the University of Agriculture, Faisalabad. Addition or a surfactant improved the efficacy of tribunil herbicide spray by increasing rentention of the spray solution and decreasing bounce off loss. Application of tribunil (if) 2 kg ha" + 0.2 % surfactant resulted in better weed control and eliminated their competition with wheat crop by increasing weed mortality to the extent of 88.46 % as compared to control. It resulted in higher grain yield and maximized the net benefit among the tested treatments. Addition or a surfactant also increased net benefit over application of tribunil alone. All the weedicide treatments with or without a surfactant significantly decreased the weed flora. Application of tribunil and tribunil plus a surfactant also resulted in increased fertile tillers, number of grains per spike as well as grain weight as compared to other treatments. Key words: efficacy of tribunil, surfactant, weeds in wheat
