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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Ants, Bees, Wasps and Sawflies (Hymenoptera) » "Parasitica" - Parasitoid Wasps » Cynipoidea » Gall Wasps (Cynipidae) » Herb and Herb Inquiline Gall Wasps (Diastrophini) » Diastrophus » Blackberry Knot Gall Wasp (Diastrophus nebulosus)
Photo#378424
Raspberry? gall and larvae - Diastrophus nebulosus
Copyright © 2010 Beatriz Moisset

Raspberry? gall and larvae - Diastrophus nebulosus
Horsham trail. Horsham, Montgomery County, Pennsylvania, USA
March 20, 2010
Size: 3 mm
Two galls in what I think is a raspberry bush. I can check later if it doesn't seem right.
The galls are about 4 or 4.5 cm long and contain many larvae. I hope that I can get adults.

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Contributed by Beatriz Moisset on 20 March, 2010 - 5:18pm
Last updated 19 February, 2019 - 3:51pm

Moved
Moved from ID Request. The longitudinal furrows in the galls are distinctive for this species.
… Charley Eiseman, 21 March, 2010 - 12:33pm login or register to post comments

Looks like ...
Blackberry Knot Gall Wasp (Diastrophus nebulosus)

But I am not an expert ... I am, however, sure that the host plant is blackbaerry ...
… T. Gilliam, 20 March, 2010 - 7:55pm login or register to post comments

 
I should have known
My friend said "wild raspberry" and I wasn't too convinced, plus I forgot that I have seen blackberries in the summer in that area.
Thanks Charley for confirming the ID. With a little luck I might get the adults.
… Beatriz Moisset, 21 March, 2010 - 6:42pm login or register to post comments

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