ABSTRACT - 593895 The disclosure relates to a stable aqueous liquid auxin herbicide composition comprising a solution of at least one of 2,4-dichlorophenoxyacetic acid (2,4,D) and 3,6-dichloro-o-anisic acid (dicamba) in the form of the monomethylamine salt and at least one of 2,4-D and dicamba in the form of the dimethylamine salt wherein the molar ratio of monomethylamine to dimethylamine is in the range of from 1:20 to 4:6 and wherein the concentration of at least one of 2,4-D and dicamba is at least 500 g/L based on herbicidal acid equivalent. The combination of the monomethylamine (MMA) and dimethylamine (OMA) salts of at least one of 2,4-D and dicamba in said molar ratio of monomethylamine to dimethylamine significantly improves the solution stability of said auxins allowing significantly higher loadings to be formulated.
