Control of growth of mono- and di-cotyledonous weeds - by post=emergence application of asulam with low doses of paraquat

摘要

Control of the growth of mono- and di-cotyledonous weeds is achieved by post-emergence appln. of asulam (I) or its salts together with paraquat (II). The appln. rates are 1.5-3 kg (I) equiv. per sprayed ha and 50-150 g (II) equiv. per sprayed ha. The ratio of (I) equiv. to (II) equiv. is 10:1-30:1 by wt. At the appln. rates used excellent and persistent control of the growth of weeds is achieved, without the antagonistic effect observed with higher dose levels of (II). Reduced amts. of herbicide are required for satisfactory control of weed growth; frequency of appln. of the herbicide for weed control is reduced; and the spectrum of weeds controlled at a given appln. rate is increased.