Effect of tank mixed application of ammonium sulphate and carfentrazone-ethyl + clodinafop-propargyl + metsulfuron-methyl on weeds and yield of wheat

Abstract

Weeds are serious problem in wheat crop. The adjuvants are used to increase the weed control spectrum of herbicide or to reduce the dose of herbicide without affecting weed control efficiency. The effect of tank mixed application of ammonium sulphate and carfentrazone-ethyl + clodinafop-propargyl + metsulfuron-methyl on weeds of wheat (Triticum aestivum L.) was investigated under field conditions. The experiment comprised of carfentrazone-ethyl + clodinafop-propargyl + metsulfuron-methyl @ 500, 375 g/ha alone and with 1% and 2% ammonium sulphate solution. The maximum reduction in weed density (97.29%) and dry weight (94.27%) was recorded with carfentrazone-ethyl + clodinafop-propargyl + metsulfuron-methyl @ 500 g/ha. The grain yield and yield components of wheat were affected significantly, by treatments. Maximum grain yield was obtained with carfentrazone-ethyl + clodinafop-propargyl + metsulfuron-methyl @ 500 g/ha. This treatment resulted in 37.71% more grain yield over weedy check. Addition of 1-2% (wt/v) ammonium sulphate did not enhance the activity of herbicide. Based on present study, it is concluded that use of ammonium sulphate adjuvants did not increase the efficiency of carfentrazone-ethyl + clodinafop-propargyl + metsulfuron-methyl.