Relationship between adult oviposition preference and larval performance of the diamondback moth, Plutella xylostella

Abstract

Unraveling the relationship between adult oviposition preference and offspring performance is central to understanding the evolution of plant–insect interactions. In the present study, we collated previously reported data, including our own, of adult oviposition preference and offspring performance of the diamondback moth, Plutella xylostella, on various wild and cultivated crucifer plants, and did correlation analysis between the two. Intrinsic rate of increase, pupal weight and fecundity of the ensuing adults were regarded as an indicator of larval performance of P. xylostella among 18 species of wild and cultivated host plants. Adult preference was estimated as the relative number of eggs laid on the plants by P. xylostella in a two-choice test or similar tests. Adult oviposition preference and larval performance of P. xylostella were positively related, so at least for undamaged (not induced) plants mother appears to know best.