Canadian Forest Service Publications
Distribution of ovipositional attacks by parasitoids on over-wintering larvae of the spruce budworm Choristoneura fumiferana (Lepidoptera : Tortricidae) 1977. McLeod, J.M. The Canadian Entomologist 109(6): 789-796.
Issued by: Laurentian Forestry Centre
Catalog ID: 16371
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Parasitism by Apanteles and Glypta spp. on spruce budworm in five localities in Quebec in 1975 was exceptionally high, averaging 52%. The frequency distribution of attacks of these species, and the outcome of inter- and intraspecific progeny competition are described, using dissection data. Superparasitism occurred on a Poisson distribution, but rates of multiparasitism lower than expected indicate interference between Apanteles and Glypta spp.