Efficacy of Carfentrazone and Pinoxaden Combinations against Mixed Weed Flora in Wheat

摘要

Field experiments were conducted during Rabi 2008-09 and 2009-10 at Palampur to evaluate the efficacy of carfentrazone and pinoxaden combinations with and without surfactant against mixed weed flora in wheat. Phalaris minorwas most predominant weed constituting 49.0 and 74.5% of total weed flora during 2008-09 and 2009-10, respectively. Avena ludoviciana, Anagallis arvensis and Lolium temulentum were the other important veeds. Pinoxaden 40 g ha~(-1) followed by (fb) carfentrazone 25 g ha1 + ammonium sulphate (A/S) 1% and arfc ntrazone 25 g ha~(-1) fb pinoxaden 40 g ha~(-1) were comparable to weed free treatment in reducing the population of Phalaris minor and Avena ludoviciana and thereby total weed dry weight. Pinoxaden 40 g ha~(-1) effectively cor+rolled the grassy weeds. Effective control of mixed weed flora with pinoxaden 40 g ha1 fb carfentrazone 25 g ha~(-1) + A/S 1 % resulted in significantly higher grain yield of wheat and thereby net returns. Carfentrazone and pinoxaden combinations with surfactants in general provided better weed control as compared to those without surfactants. Weeds reduced grain yield of wheat by 63%.