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FINAL-INSTAR LARVAE OF NATIVE PUPAL PARASITES AND HYPERPARASITES OF OPEROPHTERA SPP. (LEPIDOPTERA: GEOMETRIDAE) ON SOUTHERN VANCOUVER ISLAND

Published online by Cambridge University Press:  31 May 2012

L.M. Humble
L.M. Humble
Affiliation:
Biology Department, University of Victoria, Victoria, British Columbia V8W 2Y2
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Abstract

Three native species of parasites and 3 hyperparasites were reared from pupae of the European winter moth, Operophtera brumata (L.), and the Bruce spanworm, O. bruceata (Hulst), collected in the Victoria area of Vancouver Island, British Columbia, in 1981. Two of the pupal parasites also attacked other species of Geometridae. Two species of hyperparasites attacked Cyzenis sp., and the third parasitized ichneumonid primary parasites of Operophtera spp. The hyperparasites may have a negative impact on the biological-control agents, Cyzenis albicans (Fall.) and Agrypon flaveolatum (Grav.). Total parasitism by pupal parasites of the Operophtera host complex was about 4%. Descriptions and illustrations of cephalic structures of final-instar larvae of the parasites and a key for their separation are given.

Résumé

On a élevé 3 espèces de parasites indigènes et 3 hyperparasites à partir des pupes de l'arpenteuse tardive, Operophtera brumata (L.), et de l'arpenteuse de Bruce, O. bruceata (Hulst), prélevées dans la région de Victoria sur l'Ile de Vancouver, Colombie-Britannique, en 1981. Deux des parasites de pupes parasitaient aussi d'autres Geometridae. Deux des hyperparasites parasitaient une Cyzenis sp. et le troisième parasitait des parasites primaires ichneumones des Operophtera spp. Les hyperparasites pourraient avoir un impact négatif sur les auxiliaires de lutte Cyzenis albicans (Fall.) et Agrypon flaveolatum (Grav.). Le parasitisme total des pupes du complexe Operophtera était d'environ 4%. On trouvera des descriptions et illustrations des structures céphaliques des larves de dernier stade des parasites et une clé pour leur séparation.

Type
Articles
Information
The Canadian Entomologist , Volume 117 , Issue 5 , May 1985 , pp. 525 - 534
Copyright
Copyright © Entomological Society of Canada 1985

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