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FINAL-INSTAR LARVAE OF NATIVE HYMENOPTEROUS AND DIPTEROUS PARASITES OF OPEROPHTERA SPP. (LEPIDOPTERA: GEOMETRIDAE) IN BRITISH COLUMBIA

Published online by Cambridge University Press:  31 May 2012

David R. Gillespie  and
Thelma Finlayson
David R. Gillespie
Affiliation:
Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6
Thelma Finlayson
Affiliation:
Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6
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Abstract

Nine species of parasites and one hyperparasite were reared from a complex of the brace spanworm, Operophtera bruceata (Hulst), and the European winter moth, O. brumata (L.), collected in the Victoria area of Vancouver Island, British Columbia, in 1976 and 1977. Parasitism of the host complex was about 1.5%, mainly due to an unnamed species of Phobocampe (Ichneumonidae). All species of parasites taken in British Columbia on the two hosts have congeneric counterparts on O. brumata in Europe as listed by Wylie (1961); thus the release of exotic species in addition to the two already released in British Columbia may not enhance the biological control of O. brumata. Descriptions and illustrations of cephalic structures of final-instar larvae of the parasites and a key for their separation are given.

Résumé

Neuf espèces de parasites et un hyperparasite ont été obtenus d’un complexe d’hôtes comprenant l’arpenteuse de Bruce, Operophtera Bruceata (Hulst), et l’arpenteuse tardive, O. brumata (L.), collectionnées dans la région de Victoria sur l’ile de Vancouver, Colombie-Britannique, en 1976 et 1977. L’incidence de parasitisme du complexe d’hôtes était d’environ 1.5%, le principal parasite étant une espèce inconnue du genre Probocampe (Ichneumonidae). Toutes les espèces de parasites trouvées en Colombie-Britannique sur les 2 hôtes ont une espèce congénérique équivalente associée à O. brumata en Europe selon la liste publiée par Wylie (1961), de telle sorte que l’introduction de nouvelles espèces exotiques en plus des deux espèces déjà introduites en Colombie-Britannique n’améliorerait pas nécessairement le contrôle biologique d’O. brumata. Des descriptions et des illustrations des structures céphaliques du dernier stade larvaire des parasites et une clé permettant leur séparation sont fournies.

Type
Articles
Information
The Canadian Entomologist , Volume 113 , Issue 1 , January 1981 , pp. 45 - 55
Copyright
Copyright © Entomological Society of Canada 1981

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References

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