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The species of Chalcidoidea (Hymenoptera) introduced to North America for biological control of the cabbage seedpod weevil, and the first recovery of Stenomalina gracilis (Chalcidoidea: Pteromalidae)

Published online by Cambridge University Press:  02 April 2012

Gary A.P. Gibson ,
David R. Gillespie  and
Lloyd Dosdall
Gary A.P. Gibson*
Affiliation:
Agriculture and Agri-Food Canada, Biodiversity and Integrated Pest Management, K.W. Neatby Building, 960 Carling Avenue, Ottawa, Ontario, Canada K1A 0C6
David R. Gillespie
Affiliation:
Agriculture and Agri-Food Canada, Environmental Health, Integrated Pest Management Research Centre, P.O. Box 1000, Agassiz, British Columbia, Canada V0M 1A0
Lloyd Dosdall
Affiliation:
Department of Agricultural, Food and National Science, 4–10 Agriculture/Forestry Centre, University of Alberta, Canada T6G 2P5
*
1 Corresponding author (e-mail: [email protected]).
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Abstract

The species of Pteromalidae (Chalcidoidea) introduced to British Columbia, Canada, from Europe in 1949 as Trichomalus fasciatus (Thomson, 1878), Xenocrepis pura Mayr, 1904, and Habrocytus sp. for classical biological control of Ceutorhynchus obstrictus (Marsham, 1802) (Coleoptera: Curculionidae) are shown to be misidentifications of Trichomalus perfectus (Walker, 1835), Mesopolobus morys (Walker, 1848), and Stenomalina gracilis (Walker, 1834), respectively. Species reared subsequently from seedpods of Brassica spp. (Brassicaceae) in British Columbia and reported in the literature under the first three names are shown to be misidentifications of, respectively, Trichomalus lucidus (Walker, 1835), Mesopolobus moryoides Gibson, 2005, and one or both of Pteromalus puparum (L., 1758) and T. lucidus. There is no evidence that either T. perfectus or M. morys established in North America, but S. gracilis is newly recorded from southern British Columbia based on specimens reared from Brassicaceae seedpods in 2004 and 2005.

Résumé

Les espèces de Pteromalidae (Chalcidoidea) introduites d'Europe en Colombie-Britannique, Canada, en 1949 sous les noms de Trichomalus fasciatus (Thompson, 1878), de Xenocrepis pura Mayr, 1904 et d'Habrocytus sp. pour faire une lutte biologique classique à Ceutorhynchus obstrictus (Marsham, 1802) (Coleoptera : Curculionidae) ont été mal identifiées et appartiennent en fait respectivement aux taxons Trichomalus perfectus (Walker, 1835), Mesopolobus morys (Walker, 1848) et Stenomalina gracilis (Walker, 1834). Des espèces élevées subséquemment à partir de capsules de graines de Brassica spp. (Brassicaceae) en Colombie-Britannique et citées dans la littérature sous les trois premiers noms ci-haut ont aussi été mal identifiées et appartiennent respectivement à Trichomalus lucidus (Walker, 1835), à Mesopolobus moryoides Gibson, 2005 et à l'une ou les deux des espèces Pteromalus puparum (L., 1758) et T. lucidus. Il n'y a pas d'indication que T. perfectus ou que M. morys se soient établies en Amérique du Nord; cependant, la présence de S. gracilis est signalée pour la première fois dans le sud de la Colombie-Britannique, à l'étude de spécimens élevés sur des capsules de graines de Brassicaceae en 2004 et 2005.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 138 , Issue 3 , June 2006 , pp. 285 - 291
Copyright
Copyright © Entomological Society of Canada 2006

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