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CONTROL OF EGG FERTILIZATION BY NASONIA VITRIPENNIS (HYMENOPTERA: PTEROMALIDAE) WHEN LAYING ON PARASITIZED HOUSE FLY PUPAE1

Published online by Cambridge University Press:  31 May 2012

H. G. Wylie
H. G. Wylie
Affiliation:
Research Station, Canada Department of Agriculture, Winnipeg, Manitoba
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Abstract

Females of Nasonia vitripennis (Walk.) lay a smaller percentage of fertilized (i.e. female) eggs on house fly, Musca domestica L., pupae previously parasitized by their own species, by Muscidifurax zaraptor K. & L., or by Spalangia cameroni Perk. (Hymenoptera: Pteromalidae) than on unparasitized hosts. They respond to changes in the fly pupae associated with death, and in the case of house flies attacked by N. vitripennis, to "venoms" injected at that time or to changes unrelated to death. By not fertilizing eggs that they lay on attacked hosts, the females also conserve sperm, for immature N. vitripennis on previously-attacked fly pupae are usually killed by parasite larvae already present.

Type
Articles
Information
The Canadian Entomologist , Volume 105 , Issue 5 , May 1973 , pp. 709 - 718
Copyright
Copyright © Entomological Society of Canada 1973

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