n African Entomology - Field biology of woolly apple aphid, Eriosoma lanigerum (Hausmann), and its natural enemy, Aphelinus mali (Haldeman), in apple orchards in the Western Cape Province
|Article Title||Field biology of woolly apple aphid, Eriosoma lanigerum (Hausmann), and its natural enemy, Aphelinus mali (Haldeman), in apple orchards in the Western Cape Province|
|© Publisher:||Entomological Society of South Africa (ESSA)|
|Author||J.M. Heunis and K.L. Pringle|
|Publication Date||Mar 2006|
|Pages||77 - 86|
|Keyword(s)||Aphelinus mali, Apple, Biology and Eriosoma lanigerum|
The seasonal cycles of Eriosoma lanigerum (Homoptera : Aphidiae) and its natural enemy, Aphelinus mali (Hymenoptera: Apelinidae), were studied in the Western Cape Province region of South Africa. Crawlers of E. lanigerum migrated from the roots into the apple trees during spring to initiate above-ground colonies. Population numbers peaked at the end of summer. Aphelinus mali became active from February until June. Eriosoma lanigerum numbers declined with the onset of winter but a few colonies remained on apple trees during winter.
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