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THE GREEN APPLE APHID, APHIS POMI DEGEER (HOMOPTERA: APHIDIDAE), AS PREY OF POLYPHAGOUS ARTHROPOD PREDATORS IN ONTARIO

Published online by Cambridge University Press:  31 May 2012

Elmer A.C. Hagley  and
W.R. Allen
Elmer A.C. Hagley
Affiliation:
Agriculture Canada Research Station, Vineland Station, Ontario, Canada L0R 2E0
W.R. Allen
Affiliation:
Agriculture Canada Research Station, Vineland Station, Ontario, Canada L0R 2E0
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Abstract

In Ontario several species of polyphagous arthropods consumed nymphs and apterous adults of the green apple aphid, Aphis pomi DeGeer, as determined by serological assays and feeding trials. The most abundant predators on apple tree foliage were the reduviid Acholla multispinosa L., the mirid Campylomma verbasci (Meyer), the coccinellids Coccinella septempunctata L. and Adalia bipunctata L., and coccinellid and chrysopid larvae. An efficacy index developed to assess the effectiveness of foliage-inhabiting predators indicated that those with the greatest potential were Chrysopa larvae and adult C. septempunctata in 1987, and adult C. septempunctata and C. verbasci in 1988. The earwig, Forficula auricularia L., showed potential as a predator of A. pomi in 1989. Of the epigeal arthropods tested, the carabids Amara aenea DeGeer, Bembidion quadrimaculatum oppositum L., and Harpalus aeneus F., and the ants Formica fusca group, Myrmica ameryana Forel, and M. monticola Wheeler were the most active feeders on A. pomi.

Résumé

En Ontario, plusieurs espèces d’arthropodes polyphages ont dévoré les nymphes et les adultes aillés du puceron vert du pommier, Aphis pomi DeGeer, comme déterminé par les essaies sérologiques et les épreuves de nutrition. Parmi les prédateurs les plus abondants au feuillage des pommiers ont été la réduve Acholla multispinosa L., la punaise Campylomma verbasci (Meyer), les coccinelles Coccinella septempunctata L. et Adalia bipunctata L., et les larves de coccinelles et des chrysopes. Un indice d’efficacité développé pour évaluer l’efficacité des prédateurs habitant le feuillage a signalé que ceux au plus grand potentiel ont été les larves de Chrysopa et les adultes de C. septempunctata in 1987, et les adultes de C. septempunctata et de C. verbasci en 1988. Le perce-oreille, Forficula auricularia L., a démontré du potentiel comme prédateur d’A. pomi en 1989. Des arthropodes épigés qui ont été étudiés, les carabes Amara aenea DeGeer, Bembidion quadrimaculatum oppositum L. et Harpalus aeneus F., et les fourmis du groupe Formica fusca, Myrmica ameryana Forel et M. monticola Wheeler ont été les mangeurs d’A. pomi les plus actifs.

Type
Research Article
Information
The Canadian Entomologist , Volume 122 , Issue 6 , December 1990 , pp. 1221 - 1228
Copyright
Copyright © Entomological Society of Canada 1990

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