The breakdown of [14C]monocrotophos insecticide on maize, cabbage and apple

The breakdown of 14C-labelled monocrotophos (dimethyl 3-hydroxy-N-methyl-cis-crotonamide phosphate) on the foliage of maize, cabbage and apple and on apple fruit has been studied. The breakdown products were mainly hydrophilic compounds such as (II) and probably dimethyl phosphate. Other breakdown products were (III), (IV) (free and conjugated), (VI) and (IX). In maize and apple (IV) was conjugated with sugars other than s-D-glucose and a polar component, possibly a conjugate, was present in cabbage but this may not have been derived from (IV) .