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Some sawfly on Coreopsis tripteris

Some sawfly on Coreopsis tripteris
Keego Harbor, Oakland County, Michigan, USA
July 6, 2019
Size: 6 cm
There is one of these on each stalk of Coreopsis tripteris in a newly planted bed. They are on nothing else. There were a few things that looked like japanese beetles in the soil below a couple of them which could also be responsible for the damage, but these seem most likely to be the culprit. I can tell they are not the Large Rose Sawfly Arge pagana that previously lived in that bed, being solitary and lacking the yellow bumps. Oh, and they curl up when disturbed.

Moved from Common Sawflies.


If they're the same as the ones in the linked observation, I think Allantinae is likely. But no sawflies are known from Coreopsis as far as I can tell, so it's definitely worth rearing to adult if you can!

Is there a protocol for doing
Is there a protocol for doing this?

I have a page with my rearing methods here. Most sawfly larvae burrow into soil to pupate, but some need something like a cork to bore into.

I just found one of these larvae in Indiana, but I think it was parasitized.

Moved from ID Request.

Similar to this one, also on Coreopsis:

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