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FIR CONEWORM, DIORYCTRIA ABIETIVORELLA (GROTÉ) (LEPIDOPTERA: PYRALIDAE), PREFER CONES PREVIOUSLY EXPLOITED BY THE SPRUCE CONE MAGGOTS STROBILOMYIA NEANTHRACINA MICHELSEN AND STROBILOMYIA APPALACHENSIS MICHELSEN (DIPTERA: ANTHOMYIIDAE)

Published online by Cambridge University Press:  31 May 2012

Laura L. Fidgen  and
Jon D. Sweeney
Laura L. Fidgen
Affiliation:
Population Ecology Group, Faculty of Forestry and Environmental Management, University of New Brunswick, Fredericton, New Brunswick, Canada E3B 6C2
Jon D. Sweeney*
Affiliation:
Natural Resources Canada, Canadian Forest Service-Atlantic Forestry Centre, PO Box 4000, Fredericton, New Brunswick, Canada E3B 5P7
*
1Author to whom reprint requests should he sent.
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Abstract

We tested the prediction that larvae of the fir coneworm, Dioryctria abietivorella (Groté), preferentially exploit cones previously damaged by cone maggots, Strobilomyia spp. In most years sampled, fir coneworm attacked a significantly greater proportion of maggot-damaged than healthy cones of both white spruce and black spruce. The ecological implications for pest management are briefly discussed.

Résumé

Nous avons éprouvé l’hypothèse selon laquelle les larves de la Pyrale des cônes du pin, Dioryctria abietivorella (Groté), préfèrent les cônes préalablement endommagés par les mouches granivores Strobilomyia spp. La plupart des années, les larves de la pyrale se sont attaquées à des proportions significativement plus élevées de cônes déjà endommagés par les mouches granivores qu’aux cônes sains des épinettes blanches ou noires. La portée écologique de ce phénomène dans la lutte biologique contre les parasites fait l’objet d’une brève discussion.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 128 , Issue 6 , December 1996 , pp. 1221 - 1224
Copyright
Copyright © Entomological Society of Canada 1996

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