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Elm zigzag sawfly – Aproceros leucopoda Takeuchi

Larva of the elm zigzag sawfly feeding on leaves leaving a typical zigzag feeding channel on the leaf underside.
Photo: CFIA

Native to Asia, Aproceros leucopoda Takeuchi, the elm zigzag sawfly, is an invasive leaf eater causing defoliation that can attack elm hosts at any age or stage of development. The CFIA has confirmed its presence in the province of Quebec. This is the first established population of this pest in North America.

If you think you have found a plant pest, report it to the Canadian Food Inspection Agency.

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