Ethoxylated fatty acid mono-ester(s) of sorbitan with a fatty acid chain length from 8 to 14 and an overall degree of ethoxylation from 7 to 16 are new (though related to the polysorbates). These compounds are useful as adjuvants in agrochemical formulations, particularly combination formulations of herbicides having differing weed control effects, notably of non-selective herbicide and selective herbicide； particularly selective herbicide, particularly selective broadleaf herbicide, and graminicide； and selective graminicide and non-selective herbicide, especially a combination of a glyphosate type non-selective water soluble herbicide with a clethodim type selective (graminicide) herbicide, particularly to reduce or eliminate antagonism between differing types of herbicide. Formulations including such herbicide combinations and the adjuvant compounds are particularly useful in controlling weed including volunteer glyphosate resistant maize in subsequently sown glyphosate resistant soya.
