Environmental Entomology (2012) 41, 1364-1371

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Lessando M. Gontijo, Stephen D. Cockfield and Elizabeth H. Beers (2012)
Natural enemies of woolly apple aphid (Hemiptera: Aphididae) in Washington State
Environmental Entomology 41 (6), 1364-1371
Abstract: Woolly apple aphid, Eriosoma lanigerum (Hausmann), has become a pest of increasing importance in Washington apple orchards in the past decade. The increase in aphid outbreaks appears to be associated with changes in pesticide programs and disruption of biological control. We sampled woolly apple aphid colonies in central Washington apple orchards for natural enemies of this pest from 2006 to 2008. The most common predators encountered were Syrphidae (Syrphus opinator Osten Sacken, Eupeodes fumipennis Thomson, and Eupeodes americanus Wiedemann); Chrysopidae (Chrysopa nigricornis Burmeister); and Coccinellidae (Coccinella transversoguttata Brown and Hippodamia convergens Guérin-Méneville). The specialist syrphid Heringia calcarata Loew was recorded for the first time occurring in Washington apple orchards. The only parasitoid found in aerial colonies of woolly apple aphid was Aphelinus mali Haldeman; root colonies, however, were not parasitized. Identification of important natural enemies provides a better basis for conservation biological control of this pest.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Elizabeth H. Beers

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
surveys/distribution/isolation


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Eriosoma lanigerum Apple (Malus) U.S.A. (NW)
Coccinella transversoguttata (predator) Eriosoma lanigerum Apple (Malus) U.S.A. (NW)
Hippodamia convergens (predator) Eriosoma lanigerum Apple (Malus) U.S.A. (NW)
Chrysopa nigricornis (predator) Eriosoma lanigerum Apple (Malus) U.S.A. (NW)
Aphelinus mali (parasitoid) Eriosoma lanigerum Apple (Malus) U.S.A. (NW)
Heringia calcarata (predator) Eriosoma lanigerum Apple (Malus) U.S.A. (NW)
Eupeodes americanus (predator) Eriosoma lanigerum Apple (Malus) U.S.A. (NW)
Syrphus opinator (predator) Eriosoma lanigerum Apple (Malus) U.S.A. (NW)
Eupeodes fumipennis (predator) Eriosoma lanigerum Apple (Malus) U.S.A. (NW)