GB598104A - Improvements in compositions for the prevention and destruction of weeds - Google Patents

Abstract

Compositions for the prevention and destruction of weeds comprise 2 : 4-dichlorophenoxyacetic acid or a lower alkyl ester, or alkali metal or ammonium salt thereof in association with a non-solvent carrier or diluent, the concentration of the acid or its stated derivative being at least 0.1 per cent by weight of the total composition. In liquid form, the compositions comprise also wetting, dispersing or emulsifying agents such as sulphonated vegetable oils (e.g. sulphonated castor oil, corn oil, peanut oil and soya bean oil), and polyalkylene products of the formula R.O.(C2H4O)n.R1, where R is an alkyl, aryl, p aralkyl, alkyl-aryl or acyl group of at least 10 carbon atoms, R1 is an alkyl, aryl, aralkyl, alkyl-aryl or acyl group or a hydrogen atom and n is an integer greater than 2, e.g. Tween No. 20 and "Triton N.E." (Registered Trade Mark), and in the dry form they may contain additional herbicides (e.g. sodium chlorate, ammonium sulphamate, sodium dinitro-ortho-cresylate and sodium arsenite), an inert filler such as talc or bentonite, a wetting agent in dry form such as alkanol, an acidifying agent (e.g. citric, tartaric, succinic, malic, maleic, fumaric or sulphamic acid) and a buffer salt. In one example, the active agent is mixed with a light grade motor oil and talc and ground in a pebble-mill. Specifications 573,929 and 574,274 are referred to.