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Bev Wigney | all galleries >> Galleries >> Tracks & Signs > Arge ochropa -- sawfly ovipositing into cuts made in rose stem
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Arge ochropa -- sawfly ovipositing into cuts made in rose stem

Found on a rose stem. Female depositing eggs
through a slit cut into the stem. This is a photo of the larvae on the rose leaves seen last summer.

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fClaudia Wool Marsh 08-Jun-2007 16:40
We live in Watertown, NY which is about 20 miles south of the Canadian border. Last year we were inundated with the stem damage that started as lines and ended as a dark, scabby-like thing, that left the stem with a crook in it. (I've gotten so I can spot them across the yard.) Then, we were faced with these sassy, stand-up and fight,type gang of larvae. We killed these all by hand. My family and I have over 80 roses, and we've never had these before. I am so glad to finally figure it out. By the way, the rose that was bothered the most was "Carefree Delight", and next was "Lyda Rose". The problem is much better this year, so we'll keep our fingers crossed. Thankyou so much.
Guest 23-Aug-2004 20:42
Please submit this image for the field guide. Thank you.
Bev Wigney08-Aug-2004 11:13
Thanks for the identification, David. The sawfly was, indeed, photographed on a rose bush in eastern Ontario (just north of the Ogdensburg area in N.Y. state). -bev
David R. Smith 08-Aug-2004 02:38
This is Arge ochropa (Gmelin) (Argidae). It feeds on roses and is an introduction from Europe, first reported in Ontario, and, so far as is known, only occurs in Ontario in N. America. It has never been recorded from the U.S. If this was taken inthe U.S., I would be interested in the locality - and receiving specimens to document the record.

David R. Smith
Department of Entomology
Smithsonian Institution, NMNH
P.O.Box 37012, MRC 168
Washington, DC 20013-7012