Alberta Insect Pest Monitoring Network

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This Week
Survey Results
These are the results of a survey of 42 canola fields July 20, 21, 25 and 26, 2916.

Canola plants were assessed for the typical bell damage to the flowers. Those fused flowers were dissected in the field or lab to confirm the presence of Swede midge.

Red balloons mean that larvae were present in the damaged fused flowers .

Orange balloons mean that there was damage consistent with Swede midge, but there were no larvae for a positive confirmation of the insect.

Green balloons mean that there were no damaged flowers.

These findings represent very, very low numbers of Swede midge. For example 5 single fused flowers on 100 canola plants or 250 canola racemes.

Thank you to Justina Nibourg for her help in completing this survey.

We are planning to survey again in 2017.

Program informationNewsInsect identification web pages
Alberta's Most UNwanted
If you see any of these insects, capture them in a container and freeze. Record where you captured them and contact us at
If you find damage to canola plants that looks like Swede midge, email
Tree invasive species

Crop Diversification Centre South
For more information about the content of this document, contact Shelley Barkley.
This information published to the web on December 22, 2011.
Last Reviewed/Revised on October 18, 2016.