Effect of herbicides on the carbohydrate and nitrogen contents of nutgrass (Cyperus rotundus L.)

Abstract

The effect of four herbicides on the starch and nitrogen contents of the tubers, dry matter production, carbohydrate, amide, amino, ammonium and nitrate nitrogen contents of the foliage of nutgrass (Cyperus rotundus L.) under pot culture conditions was studied. The starch content of the tubers of nutgrass depleted maximum by the Embutox-plus and Tok E-25 when applied as foliar spray and soil placement, respectively. The foliar application of Embutox-plus and Tok E-25 appeared to have maximum reduction in the carbohydrate and different nitrogen contents in the foliage of nutgrass as compared with other herbicides used. Severe reduction in the amide and amino nitrogen was observed as against ammonium or nitrate nitrogen content on the application of herbicides.