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AN EFFECT OF PARASITISM BY MICROCTONUS VITTATAE (HYMENOPTERA: BRACONIDAE) ON EMERGENCE OF PHYLLOTRETA CRUCIFERAE AND PHYLLOTRETA STRIOLATA (COLEOPTERA: CHRYSOMELIDAE) FROM OVERWINTERING SITES1

Published online by Cambridge University Press:  31 May 2012

H. G. Wylie
H. G. Wylie
Affiliation:
Research Station, Agriculture Canada, Winnipeg, Manitoba R3T 2M9
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Abstract

Adults of the two main rape-infesting flea beetle species in Manitoba, Phyllotreta cruciferae (Goeze) and Phyllotreta striolata (F.), that were parasitized by Microctonus vittatae Mues., emerged earlier from overwintering sites than unparasitized adults of the same species. Early emergence of parasitized beetles ensures early emergence of parasite adults and thereby probably increases the impact of the parasite on the host's population.

Résumé

Les adultes des deux principales altises du colza au Manitoba, Phyllotreta cruciferae (Goeze) et Phyllotreta striolata (F.), qui étaient parasités par Microctonus vittatae Mues, sont sortis plus tôt des sites d'hivernage que les adultes non parasités. La sortie précoce des altises parasitées entraîne celle des parasites adultes et ainsi accroît probablement l'effet des parasites sur la population hôte.

Type
Articles
Information
The Canadian Entomologist , Volume 114 , Issue 8 , August 1982 , pp. 727 - 732
Copyright
Copyright © Entomological Society of Canada 1982

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