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The Eurasian strawberry blossom weevil, Anthonomus rubi (Herbst, 1795), is established in North America

Published online by Cambridge University Press:  23 June 2021

Michelle T. Franklin*
Affiliation:
Agriculture and Agri-Food Canada, Agassiz Research and Development Centre, 6947 Highway 7, P.O. Box 1000, Agassiz, British Columbia, V0M 1A0, Canada
Tracy K. Hueppelsheuser
Affiliation:
British Columbia Ministry of Agriculture, Food and Fisheries, Plant and Animal Health Branch, 1767 Angus Campbell Road, Abbotsford, British Columbia, V3G 2M3, Canada
Paul K. Abram
Affiliation:
Agriculture and Agri-Food Canada, Agassiz Research and Development Centre, 6947 Highway 7, P.O. Box 1000, Agassiz, British Columbia, V0M 1A0, Canada
Patrice Bouchard
Affiliation:
Agriculture and Agri-Food Canada, Canadian National Collection of Insects, Arachnids, and Nematodes, Ottawa Research and Development Centre, 960 Carling Avenue, K.W. Neatby, Ottawa, Ontario, K1A 0C6, Canada
Robert S. Anderson
Affiliation:
Beaty Centre for Species Discovery, Canadian Museum of Nature, P.O. Box 3443, Station D, Ottawa, Ontario, K1P 6P4, Canada
Gary A.P. Gibson
Affiliation:
Agriculture and Agri-Food Canada, Canadian National Collection of Insects, Arachnids, and Nematodes, Ottawa Research and Development Centre, 960 Carling Avenue, K.W. Neatby, Ottawa, Ontario, K1A 0C6, Canada

Abstract

We report the strawberry blossom weevil, Anthonomus rubi (Herbst, 1795) (Coleoptera: Curculionidae), a species native to Europe, Asia, and North Africa, as established in British Columbia, Canada. This is the first report of A. rubi in North America. We provide a diagnosis of the species and compare it with other species of the genus Anthonomus Germar in Canada. This species is a pest of plants in Rosaceae Jussieu, including economically important berries such as strawberries (Fragaria Linnaeus) and raspberries (Rubus idaeus Linnaeus), and of native berries of importance to Indigenous peoples in Canada. Female weevils oviposit eggs inside developing flower buds and sever flower stalks, facilitating larval development inside damaged buds and thus reducing fruit yields. Surveys to confirm the presence of A. rubi conducted in 2020 found the weevil to be well established in cultivated and wild hosts throughout the Greater Vancouver area and Fraser Valley, British Columbia. At least one species of parasitoid wasp in the genus Pteromalus Swederus (Hymenoptera: Pteromalidae) has been found in association with A. rubi in the province. Future investigations are required to understand the biology of A. rubi in its new range, assess its impact on berries, and develop management strategies.

Information

Type
Scientific Notes
Copyright
© The authors and Her Majesty, the Queen, in right of Canada, 2021. Published by Cambridge University Press on behalf of the Entomological Society of Canada

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