Lydella thompsoni (parasitoid)

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Lydella thompsoni (parasitoid) Herting

This tachinid fly is an important parasitoid of the European corn borer, Ostrinia nubilalis. Its natural distribution ranges from Europe to temperate parts of Asia, up to Japan. In Asia it attacks the Asian corn borer, Ostrinia furnacalis. L. thompsoni has been successfully introduced into North America and is commercially available. Natural rates of parasitisation often exceed 10% and rates up to 75% have been recorded.

Females lay eggs containing larvae that are ready to hatch on maize stems, near the entrance holes of corn borer larvae. The hatching larvae then enter the tunnel and find an Ostrinia larva. There can be 2 tachinid generations per year and the pupae are the overwintering stage.