Induction of Hydrolases by Allelochemicals and Host Plants in Fall Armyworm (Lepidoptera: Noctuidae) Larvae

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Abstract
The influence of allelochemicals and host plants on two hydrolases, α -naphthyl acetate ( α -NA) esterase and styrene oxide hydrolase, was investigated in the fall armyworm, Spodoptera frugiperda (J. E. Smith). The α -NA esterase was induced by a range of allelochemicals. Celery, potato, and parsley were also active in inducing the esterase, whereas a number of other host plants had no significant effect. Styrene oxide hydrolase was moderately induced by indole 3-carbinol, peppermint oil, and phenobarbital, but none of the host plants showed any inductive effect.

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