Different Population Phenologies of Grapholita molesta (Busck) in Two Hosts and Two Nearby Regions in the NE of Spain

Grapholita molesta is an important pest of stone and pome fruits. In commercial orchards, integrated management programs use pheromone traps to monitor the population dynamics G. adjust treatments. Phenology models can be used forecast phenology pests help optimise time point at which spray orchards with insecticides. present study, adult phenologies in two provinces north-east Spain were studied, as well their fit model most both provinces. Weekly captures adults through season recorded over 5 y a large number these data determine generations each province. The results show significant differences between generation time, being 97 degree days (DD) shorter Lleida province than Girona province, four registered, while five detected Lleida. As result found, was not able predict precisely