Abstract
A total of 5365 female Itoplectis quodricingulatus (Provancher) was released on a 40-acre site over a 7-week period when pupae of the European pine shoot moth, Rhyacionia buoliana (Schiffermuller), were present. Activity and parasitizing ability of the parasites were estimated from weekly parasitization of wax moth pupae hung from tree branches. Effectiveness of the release against shoot moth was evaluated by comparing parasitization of shoot moth pupae in exposed and caged branches. About 50% of the wax moth pupae but only 30% of the shoot moth pupae were killed by I. quadricingulatus .
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