Abstract:
Post-emergence herbicide, Fluazifop-butyl [0 Butyl 2-(4-(5- trifluoromethyl-2- pyridyl-2-pyridloxy phenoxy]propionate (Fusilade), in two concentrations (0.3 and 0.5 kg ai/ha) alone and in combination with two volumes (0.01 and 0.02 v/v) of nonionic surfactant agral-90, [900 g/1 alkyl phenol ethylene oxide condensate (87% w/w)] was tested in sunflower under rainfed conditions during spring and autumn seasons. 1986. Weed species, in spring and autumn, were almost similar with one exception, however, the density of grasses and broad leaved weeds varied to some extent. With Fluazifop- butyl the control of broad leaf and sedges was negligible as compared to grasses. There was 10.6 percent higher control of grassy weeds in autumn as compared to the spring planting. Within the treatments, Fluazifop-butyl at 0.5 kg ai/ha alone or with 1 and 2 percent of Agral-90, gave 98.5%, 94.3% and 92.0% grass kill, respectively, as an average of the two seasons. In both seasons, surfactant, at the rate of 2 percent increased the efficacy of Fluazifop-butyl (0.5 kg ai/ha) in controlling the grass weeds. Highest seed yields were obtained from band weeded plots. However; herbicide treatment at the concentration of 0.5 kg ai/ha, with or without surfactant, gave significantly higher yield than the weedy check and other herbicide treatments.
Page(s):
25-31
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Weed Science Research, Volume: 4, Issue: 1, Year: 1991