Differing effects of parental and natal hosts on the preference and performance of the stored product pests Callosobruchus maculatus and C. analis

Bean beetles (Bruchinae) are a taxon of seed predators and several species economically significant stored product pests. Seed quality may affect adult life history traits, with consequences for their population dynamics. We investigated if variation in host (poor quality: lentil; high mung bean) as experienced by the parental (i.e. individuals ovipositing) generation natal study emerging from host) influenced preference performance Callosobruchus maculatus C. analis. Both preferred ovipositing on bean regardless experience. Emergence rate was all treatments except reared mung, whose offspring did poorly when developing lentil. The sex ratio 1:1 analis lentil, which female biased parents were but male mung. In analis, lentil resulted larger irrespective host, while emerged host. Overall, males lentils obtained more matings, where females had there no preference. Development time increased those hosts. For difference survival then reduction also compared to lentils. This work shows that predicting effect traits requires than single-species, single-generation studies, transgenerational effects can influence closely related pest quite different ways.