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INTRODUCTION DE PARASITES ICHNEUMONIDES POUR LA LUTTE BIOLOGIQUE CONTRE FENUSA PUSILLA (HYMENOPTERA: TENTHREDINIDAE) AU QUEBEC

Published online by Cambridge University Press:  31 May 2012

H.C. Guèvremont  and
F. W. Quednau
H.C. Guèvremont
Affiliation:
Centre de Recherches forestiéres des Laurentides, Service canadien des Forêts, Sainte-Foy, Québec G1V 4C7
F. W. Quednau
Affiliation:
Centre de Recherches forestiéres des Laurentides, Service canadien des Forêts, Sainte-Foy, Québec G1V 4C7
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Abstract

Nearly 1300 Lathrolestes nigricollis (Thompson) and 900 Grypocentrus albipes Ruthe (Hymenoptera: Ichneumonidae), were released in Quebec, in 1974 and 1975, in an effort to control the birch leaf-miner, Fenusa pusilla (Lep.). The two species of European parasites were liberated in stands of gray birch (Betula populifolia Marsh.) in four localities of the St. Lawrence River Valley. Mating was well observed for L. nigricollis but not for G. albipes, and both male and female progenies were later recovered for the two species. Three generations of parasitoïds, the first of which overwintered, were recorded at the end of the summer in 1975. Establishment of these parasites of F. pusilla is very likely to occur in the near future.

Résumé

Environ 1,300 Lathrolestes nigricollis (Thompson) et 900 Grypocentrus albipes Ruthe (Hymenoptera: Ichneumonidae), ont été libérés au Québec, en 1974 et 1975, pour lutter contre la petite mineuse du bouleau, Fenusa pusilla (Lep.). Ces deux espèces de parasites européens ont été relâchées dans des peuplements de bouleau gris (Betula populifolla Marsh.) de quatre localités de la Vallée du St-Laurent. Les deux espèces ont engendré une progéniture mâle et femelle malgré l’absence d’accouplement bien caractérisé chez G. albipes. Trois générations de parasitoïdes, dont la première a hiverné, ont été enregistrées à la fin de l’été 1975. L’implantation de parasites de F. pusilla se présente jusqu’à date comme une réussite.

Type
Articles
Information
The Canadian Entomologist , Volume 109 , Issue 12 , December 1977 , pp. 1545 - 1548
Copyright
Copyright © Entomological Society of Canada 1977

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References

Bibliographie

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