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SURVEY FOR INSECTICIDE RESISTANCE IN SOME ONTARIO POPULATIONS OF THE APPLE LEAFMINER PARASITE, PHOLETESOR ORNIGIS (WEED) (HYMENOPTERA: BRACONIDAE)

Published online by Cambridge University Press:  31 May 2012

R.M. Trimble ,
D.J. Pree  and
P.M. Vickers
R.M. Trimble
Affiliation:
Agriculture Canada Research Station, Vineland Station, Ontario, Canada L0R 2E0
D.J. Pree
Affiliation:
Agriculture Canada Research Station, Vineland Station, Ontario, Canada L0R 2E0
P.M. Vickers
Affiliation:
Agriculture Canada Research Station, Vineland Station, Ontario, Canada L0R 2E0
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Abstract

Pholetesor ornigis (Weed) from 16 orchards in seven Ontario apple production areas were tested from 1987 to 1989 to determine if their levels of resistance to permethrin and methomyl were higher than those measured earlier in two Ontario populations and if they had developed resistance to azinphosmethyl. Higher levels of resistance were not detected and there was no evidence of resistance to azinphosmethyl. Some possible reasons for the lack of higher levels of insecticide resistance and some alternatives to insecticide resistance for parasite conservation are discussed.

Résumé

Pholetesor ornigis (Weed) en provenance de 16 vergers de sept régions d’exploitation de pommes en Ontario a été étudié pour déterminer si les niveaux de résistance à perméfhrine et à méthomyle étaient plus élevés que ceux enregistrés auparavant par deux populations du parasite en Ontario et pour déterminer s’il a développé une résistance à l’azinphosméthyle. Les niveaux augmentés de résistance aux premiers n’ont pas été trouvés ni aucune résistance à l’azinphosméthyle. Ont été discutés quelques possibilités pour le manque de résistance augmentée à l’insecticide ainsi que quelques contre-propositions à la résistance aux insecticides pour la conservation du parasite.

Type
Articles
Information
The Canadian Entomologist , Volume 122 , Issue 5 , October 1990 , pp. 969 - 973
Copyright
Copyright © Entomological Society of Canada 1990

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