A new species of Contarinia Rondani (Diptera: Cecidomyiidae) that induces flower galls on canola (Brassicaceae) in the Canadian prairies

Boyd A. Mori, Lars Andreassen, James D. Heal, Julian R. Dupuis, Juliana J. Soroka, Bradley J. Sinclair

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

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.

Original languageEnglish
Pages (from-to)131-148
Number of pages18
JournalCanadian Entomologist
Volume151
Issue number2
DOIs
StatePublished - Apr 1 2019

Bibliographical note

Publisher Copyright:
© 2019 Entomological Society of Canada.

ASJC Scopus subject areas

  • Structural Biology
  • Ecology, Evolution, Behavior and Systematics
  • Physiology
  • Molecular Biology
  • Insect Science

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