Test of post-emergence herbicide for the control of weeds in food legumes in Sais region, Morocco

Abstract

Legumes leave significant residual nitrogen in growing in association or in rotation. Among the problems of food legumes, the unavailability of post-emergence herbicides for the control of weeds. The objective of this study was to test new active ingredients as post-emergence herbicides for weed control in food legumes (bean, chickpea, peas and lentil. This study was conducted at the experimental station of Douyet during the 2014-2015. Six herbicide treatments were tested and compared to a control treated by a super Gallant herbicide and weeded twice: Bentazone 480 g / l (1.5 l/ha), Glyphosate under salt Isopropylamine (0.5 l/ha), Linuron (0.5 l/ha), mixing Linuron + Glyphosate under salt applied at a dose of (0.5 + 0.5 l/ha); (1 + 1 l/ha) and (1.5 + 1.5 l/ ha), respectively. The results showed that Bentazone 480 g/l (1.5l/ha), Glyphosate under salt isopropylamine (0.5 l / ha), the technique of hoeing combined with anti-grass herbicide, Haloxyphop-R Methyl Ester 104 g/l (0.5 l / ha) ensured a good level of weed control. The mixture of Linuron (0.5 l/ha) + Glyphosate under salt Isopropylamine (0.5 l/ha) also provided an acceptable level of weed control and low phyto-toxicity in chickpea and lentil. Also, Glyphosate under salt Isopropylamine (0.5 l / ha), the technique of hoeing combined with anti-grass herbicide Haloxyphop- R Methyl Ester 104 g/l (0.5 l / ha), also gave a good level of weed control on lentil. Among the tested herbicides, mixing Linuron + Glyphosate under salt Isopropylamine applied at a dose of 1.5 l + 1.5 l/ha; 1+1 l/ha and 0.5 l + 0.5 l/ha, respectively, showed excessive phytotoxicity (> 80%) on chickpea and pea