Peristenus digoneutis (parasitoid)
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Peristenus digoneutis (parasitoid) Loan
This wasp is native to Europe and has been successfully introduced into eastern North America against the tarnished plant bug (Lygus lineolaris) starting in 1979. It became established and by the early 1990s, parasitation rates of around 50% were recorded. The parasitoids overwinter as pupae in their cocoons in the soil and in spring females lay single eggs on the abdomen of Lygus nymphs. The larvae complete their development in 1-2 weeks, leave the nymphs and pupate in the soil. A second generation of wasps attack the second Lygus population and there may be a 3rd generation.