ENHANCED HERBICIDE COMPOSITIONS

摘要

A concentrate herbicidal composition is provided comprising a first herbicid e that is anionic, for example the herbicide glyphosate, and a second herbicid e that elicits a visible symptom of phytotoxicity in a plant within about 4 da ys after application to foliage of the plant. The concentrate composition furth er comprises (a) an alkylether surfactant component consisting of one or more surfactants each having the formula R12-O-(CH2CH2O)n((CHR)2O)m-R13 wherein R 12 is an aliphatic saturated or unsaturated hydrocarbyl group having about 16 t o about 22 carbon atoms, n is an average number of about 5 to about 100, m is an average number of 0 to about 5, one R in each -((CHR)2O)- group is hydrogen and the other R is methyl, and R13 is a hydrogen, C1-4 alkyl or C2-4 acyl group; and (b) an amine surfactant component. The weight ratio of the alkylether surfactant component to the amine surfactant component is about 1:10 to about 10:1; and the alkylether and amine surfactant components are present in total in an adjuvant amount of about 0.05 to about 0.5 parts by weight per part by weight of the first herbicide, expressed as acid equivalent. Also provided are a plant treatment composition comprising a fir st herbicide, a second herbicide, an alkylether surfactant component and an ami ne surfactant component, all as described above, dissolved or dispersed in wate r, and a herbicidal method comprising applying such a plant treatment compositi on to foliage of a plant.