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European earwigs forficula auricularia dermaptera forficulidae fail to control apple aphids aphis pomi on bearing apple trees and woolly apple aphids eriosoma lanigerum homoptera aphididae in apple rootstock stool beds



European earwigs forficula auricularia dermaptera forficulidae fail to control apple aphids aphis pomi on bearing apple trees and woolly apple aphids eriosoma lanigerum homoptera aphididae in apple rootstock stool beds



Journal of Economic Entomology 78(4): 972-974



Insectary-reared and wild European earwigs, Forficula auricularia L., provided with artificial daytime retreats on bearing apple trees infested with apple aphids, Aphis pomi DeGeer, failed to slow aphid population growth. The difference between this result and earlier success on nonbearing apple trees is not explained. Caged earwigs damaged a few apple fruits by feeding at the calyx end, but no damage to fruit and only minimal damage to leaves was observed when earwigs were allowed free movement. Earwigs released and caged on apple rootstock stool beds after suppression of apple aphids by insecticide treatment prevented resurgence of apple aphids but had no apparent effect on infestations of woolly apple aphids. Eriosoma lanigerum (Hausmann).

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European Earwigs (Dermaptera: Forficulidae) Fail to Control Apple Aphids on Bearing Apple Trees and Woolly Apple Aphids (Homoptera: Aphididae) in Apple Rootstock Stool Beds. Journal of Economic Entomology 78(4): 972-974, 1985

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