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A new species of Contarinia Rondani (Diptera: Cecidomyiidae) that induces flower galls on canola (Brassicaceae) in the Canadian prairies
Published online by Cambridge University Press: 15 February 2019
Abstract
A new species, Contarinia brassicola Sinclair (Diptera: Cecidomyiidae), which induces flower galls on canola (Brassica napus Linnaeus and Brassica rapa Linnaeus (Brassicaceae)), is described from Saskatchewan and Alberta, Canada. Larvae develop in the flowers of canola, which causes swelling and prevents opening, pod formation, and seed set. Mature larvae exit the galls, fall to the soil, and form cocoons. Depending on conditions, larvae will either pupate and eclose in the same calendar year or enter facultative diapause and emerge the following year. At least two generations of C. brassicola occur each year. Adults emerge from overwintering cocoons in the spring and lay eggs on developing canola flower buds. The galls produced by C. brassicola were previously attributed to the swede midge, Contarinia nasturtii (Kieffer) in Saskatchewan; here, we compare and list several characters to differentiate the two species.
- Type
- Systematics and Morphology
- Information
- Creative Commons
- Parts of this are a work of the Her Majesty the Queen in Right of Canada. Parts of this is a work of the U.S. Government and is not subject to copyright protection in the United States.
- Copyright
- © Entomological Society of Canada 2019
Footnotes
Current Address: PO Box 97, Dunrea, Manitoba, R0K 0S0, Canada
Subject editor: Dezene Huber
References
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