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Orius insidiosus (Hemiptera: Anthocoridae) in the lower Fraser Valley, British Columbia, Canada1, 2

Published online by Cambridge University Press:  02 April 2012

David R. Gillespie  and
D.M.J. Quiring
David R. Gillespie*
Affiliation:
Agriculture and Agri-Food Canada, Pacific Agri-Food Research Centre, Agassiz, British Columbia, Canada V0M 1A0
D.M.J. Quiring
Affiliation:
Agriculture and Agri-Food Canada, Pacific Agri-Food Research Centre, Agassiz, British Columbia, Canada V0M 1A0
*
3 Corresponding author (e-mail: [email protected]).
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Abstract

Populations of Orius spp. were surveyed in the lower Fraser Valley, British Columbia, to determine whether O. insidiosus Say, a non-indigenous species, had established in the region as a result of being released inside greenhouses for biological control of pests. Field collections over 8 years revealed a low incidence of O. insidiosus (10 specimens, <1% of total Orius spp. collected). Numbers in collections did not increase, and collection localities did not become more widespread over the 8 years of survey. Competitive exclusion and temperature and diapause thresholds are discussed as possible mechanisms limiting the establishment of this otherwise widespread North American species.

Résumé

Nous avons inventorié les populations d'Orius spp. dans la vallée inférieure du Fraser, Colombie-Britannique, afin de déterminer si O. insidiosus Say, une espèce non indigène, s'est établie dans la région depuis sa libération dans les serres pour la lutte biologique contre les ravageurs. Les récoltes sur le terrain pendant 8 ans indiquent une incidence faible (10 spécimens, <1 % des récoltes totales). Durant les 8 années de l'inventaire, le nombre de spécimens dans les collections entomologiques n'a pas augmenté et il n'y a pas eu de répartition élargie des sites de récolte. L'exclusion par compétition et les seuils de température et d'humidité sont considérés comme des mécanismes possibles qui ont restreint l'établissement de cette espèce, par ailleurs bien répandue en Amérique du Nord.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 138 , Special Issue/Numéro spécial 4: Honouring Geoffrey G. E. Scudder/En hommage à Geoffrey G.E. Scudder , August 2006 , pp. 590 - 593
Copyright
Copyright © Entomological Society of Canada 2006

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Footnotes

1

Contribution No. 710 from the Pacific Agri-Food Research Centre, Agassiz, British Columbia, Canada.

2

This paper is part of a special issue honouring Geoffrey G.E. Scudder for his significant contributions to entomology in Canada.

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