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. 1987 Jul;13(7):1771-6.
doi: 10.1007/BF00980217.

Chemical stimulants and deterrents regulating acceptance or rejection of crucifers by cabbage butterflies

J A Renwick  1 , C D Radke
Affiliations

Chemical stimulants and deterrents regulating acceptance or rejection of crucifers by cabbage butterflies

J A Renwick et al. J Chem Ecol. 1987 Jul.

Abstract

GravidPieris rapae butterflies oviposit on many, but not all, crucifers. Rejection ofErysimum cheiranthoides andCapsella bursa-pastoris was initially explained by the presence of chemical deterrents in the plants. Analyses and bioassays of plant extracts indicated the absence of oviposition stimulants inC. bursa-pastoris, but similar chemical separation ofE. cheiranthoides extracts revealed the presence of stimulants as well as deterrents. Choice tests illustrate how acceptance or rejection of a plant by an insect may depend on the balance of positive and negative chemical stimuli within the plant.

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