Monitoring of swede midge populations in Saskatchewan and determining the impact of swede midge on different growth stages of canola

Researcher: Julie Soroka, Owen Olfert, Larry Grenkow, Lars Andreassen, Boyd Mori, Agriculture and Agri-Food Canada, Saskatoon SK

Project Code: CARP SCDC 2014-16

Final Report: March 2017

Summary: The swede midge, Contarinia nasturtii, is a significant pest of brassica vegetable crops and canola in eastern Canada. It was first discovered in Saskatchewan in 2007 where it now threatens the canola industry. Researchers initiated a three-year study to investigate the susceptibility of canola at different growth stages to infestation by swede midge, as well as the influence of seeding date and insecticide seed treatments on levels of infestation. Overall, the research shows that agronomic benefits of early seeding outweighs the effects of the midge damage; therefore producers should plant when conditions are most agronomically suitable. Seed treatment had no effect on midge damage.

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