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DISTRIBUTION OF OVIPOSITIONAL ATTACKS BY PARASITOIDS ON OVERWINTERING LARVAE OF THE SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (LEPIDOPTERA: TORTRICIDAE)

Published online by Cambridge University Press:  31 May 2012

J. M. McLeod
J. M. McLeod
Affiliation:
Laurentian Forest Research Centre, Canadian Forestry Service, Sainte-Foy, Quebec
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Abstract

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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.

Résumé

Dan cinq localités au Quebec en 1975, la moyenne du parasitisme par Apanteles et Glypta spp. sur la tordeuse des bourgeons d’épinette était de 52%, un taux de parasitisme exceptionnalement haut. La fréquence de distribution des attaques de ces espèces et le résultat de la compétition intra- et interspécifique de la progéniture de ces parasites sont décrites, au moyen de données de dissection. Le superparasitisme était décrit par une distribution de Poisson, mais les taux de multiparasitisme, plus bas que prévus, indiquaient de l’interférence entre Apanteles et Glypta spp.

Type
Articles
Information
The Canadian Entomologist , Volume 109 , Issue 6 , June 1977 , pp. 789 - 796
Copyright
Copyright © Entomological Society of Canada 1977

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