Host switching in the adult and larval willow flea beetle (Altica subplicata): host species fidelity and rates of residency.

Abstract

This study examined host species constancy over time in the willow flea beetle, Altica subplicata. Mark-recapture techniques were used to determine rates of residency and host switching between Potentilla anserina and the willow plant Salix cordata, growing on sand dunes in northern Michigan. Larval residency times for the two host species did not differ, and larvae demonstrated host species constancy over time. Adult beetles also displayed host species constancy over time and colonized S. cordata in higher numbers than P. anserina at first move off their original host plant.