Selective herbicidal agent in the form of microemulsion, process of its preparation and use thereof

摘要

Microemulsions contain: (a) a phenoxyphenoxy or heteroaryloxyphenoxy carboxylic acid herbicide; (b) a dispersant selected from fatty alcohol polyoxypropylene-polyoxyethylene ethers and polyoxyethylene-polyoxypropylene block copolymers; (c) an emulsifier or wetting agent selected from Ca dodecylbenzene sulphonate, fatty acid polyglycol esters, ethoxylated nonylphenols and alkanol polyglycol ethers; and (d) an organic solvent. The compsns. pref. contain 20-35 wt.% (a), 10-50 wt.% (d), 15-25 wt.% (c), 1-10 wt.% (h) and 15-50 wt.% water. Component (a) is fenoxapropethyl in D or DL form. Component (d) is an aromatic, ketone or pyrollidone solvent.