| Literature DB >> 24302344 |
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.Entities:
Year: 1987 PMID: 24302344 DOI: 10.1007/BF00980217
Source DB: PubMed Journal: J Chem Ecol ISSN: 0098-0331 Impact factor: 2.626