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Sawfly Larva

Posted by June 23rd, 2008 at 12:00 am

Categories

Horntails, Wood Wasps and Sawflies

Rose caterpillar 2.jpg, Rose caterpillar 1.jpg
We live in Rush, NY (just south of Rochester, NY – western NY) and found these caterpillars devouring my yellow rose bush leaves. There are black little spots/pellets on the leaves as well. Can you help us identify them and also let us know the best way to get rid of them? We would greatly appreciate your help as we have not seen these before. Thank you!!!!
Jen Davin

Hi Jen,
Though they look like caterpillars, this is actually a Sawfly Larva. Sawflies are nonstinging relatives of wasps. There are several Sawfly families, and we believe your specimen is is the family Argidae. It resembles the Birch Sawfly posted to BugGuide. Many Sawflies are social feeders, and the group often exhibits unusual group behavior, with all group members striking unusual poses and changing position in tandem.

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