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LEUCOPIS SIMPLEX (DIPTERA: CHAMAEMYIIDAE) AND OTHER SPECIES OCCURRING IN GALLS OF PHYLLOXERA VITIFOLIAE (HOMOPTERA: PHYLLOXERIDAE) IN ONTARIO1

Published online by Cambridge University Press:  31 May 2012

A. B. Stevenson
A. B. Stevenson
Affiliation:
Research Station, Canada Department of Agriculture, Vineland Station, Ontario
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Abstract

At least seven species of arthropods were found in or associated with leaf galls of the grape phylloxera, Phylloxera vitifoliae (Fitch), on cultivated and wild grapes in Ontario, Leucopis simplex Loew and Lestodiplosis grassator (Fyles) were the most common species. Larvae of both preyed upon eggs of the phylloxera; whether they attacked other stages was not determined, nor was their effect on gall populations. L. grassator occurred almost exclusively on wild grapes; L. simplex was found in galls on both cultivated and wild grapes, associated with all generations of the leaf form of phylloxera. L. simplex was parasitized by Melanips sp. and Lygocerus sp. Another predator, Scymnus cervicalis Muls., occurred rarely. Thrips, mites, and neuropterous larvae were also found occasionally, but predation by these species was not demonstrated.

Type
Articles
Information
The Canadian Entomologist , Volume 99 , Issue 8 , August 1967 , pp. 815 - 820
Copyright
Copyright © Entomological Society of Canada 1967

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