Lack of genetic differentiation between contrasted overwintering strategies of a major pest predator Episyrphus balteatus (Diptera: Syrphidae): implications for biocontrol.
Winter ecology of natural enemies has a great influence on the level and efficiency of biological control at spring.The hoverfly Episyrphus balteatus (DeGeer) (Diptera: Syrphidae) is one of the most important natural predators of crop aphids in Europe.Three different overwintering strategies coexist in this species which makes it a good model in or