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During summer the parasitoid Aphelinus mali may certainly reduce the infestation of woolly apple aphid (Eriosoma lanigerum), but studies on the single. Asante, S.K., and W. Danthanaryana. Development of Aphelinus mali, an endoparasitoid of woolly apple aphid, Eriosoma lanigerum. Bio-pesticide properties for Aphelinus mali, including approvals, environmental fate, eco-toxicity and human health issues.

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Hoyt, and Michael J. This small wasp, native to the northeastern United States, parasitizes woolly apple aphid by laying its eggs directly into the body of the aphid. It aphekinus been introduced successfully in many apple growing areas of the world and was considered one of the early success stories of biological control.

The larva, which develops inside the aphid’s body, is elongated or shield shaped. The body color is bright yellow, with red eyes. The pupa is generally smaller than the larva. The thorax is black, and the outlines of legs and other appendages become visible as the pupa develops. The pupal stage is also spent inside the aphid’s body. The adult is a tiny black wasp slightly shorter than the woolly apple aphid with short antennae.

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The membranous wings are folded flat over the back, and extend beyond the tip of the abdomen.

Aphelinus mali

It is inconspicuous in the orchard, jumping rather than flying and preferring to hide under leaves. Aphelinus mali pupa and intact mummy E. In the early stages of development, there are no external signs of parasitism.

The aphid host may continue to grow and develop and even produce a few young after being parasitized. The most visible signs of parasitism by A.

The female inserts her egg into the lower surface of the abdomen, sometimes feeding on the body fluids that exude from the puncture. The egg hatches in about 3 days, and larval development takes about 10 to mmali days.

The parasitoid pupates in the body of the aphid, and the emerging adult chews a neat, round exit hole in the back. The total life cycle takes 20 to 25 days. There are 6 to 7 generations of A.

Aphelinus mali – Wikipedia

Peak activity of adult parasitoids corresponds with peaks in woolly apple aphid nymph production in the spring and fall. Development of Aphelinus mali, an maali of woolly apple aphid, Eriosoma lanigerum, at different temperatures. Studies on the physical ecology of woolly apple aphis Eriosoma lanigerum and its parasite, Aphelinus mali, in Palestine.

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Ecological investigations on the woolly aphid, Eriosoma lanigerum Hausm.

A biological study of Aphelinus mali Hald. Woolly apple aphid Eriosoma lanigerum Hausm. Influence of constant and alternating temperatures on woolly apple aphid Homoptera: Eriosomatidae and its parasitoid Aphelinus mali Haldeman Hymenoptera: Aphelinus mali Haldeman Hymenoptera: Eulophidae — Elizabeth H.

While it has been reported to parasitize other aphid species, its primary economic value is as a woolly apple aphid parasitoid. Diapause commences in October, and is complete by late March. Emergence of adults corresponds with the start of nymph production by the woolly apple aphid in the spring.

Look for woolly apple aphid mummies with circular exit holes. Research in Washington indicates that a large complex of generalist aphelinue, including lady beetles, syrphid fly larvae, green lacewings, and Deraeocoris brevisis at least as important as A.

Cultural practices that encourage these predators will enhance biological control of woolly apple aphid.

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