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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » True Bugs, Cicadas, Hoppers, Aphids and Allies (Hemiptera) » Plant-parasitic Hemipterans (Sternorrhyncha) » Scales and Mealybugs (Coccoidea)
Photo#1016329
Unknown gall - female
Copyright © 2014 Byrain

Unknown gall - Female
Stebbins Cold Canyon Reserve, Solano County, California, USA
November 2, 2014
On Quercus douglasii, another one I can't find a match for...
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Contributed by Byrain on 2 November, 2014 - 10:32pm
Last updated 4 November, 2014 - 4:36pm

Moved
Moved from Gall Wasps.
… Byrain, 4 November, 2014 - 9:44am login or register to post comments

scale insect
This one is actually not a gall -- it's a dead female scale insect. The little white bits are egg casings from the baby scales (called crawlers) that emerged. Crawlers have legs, and they walk away. Female scales later lose their legs, feed on the tree, get big, grow 100's of eggs inside them, and resemble galls.

However it looks as if there was likely a cynipid gall in the bud that's visible to the right of the aphid. The black thing looks like an exit hole. If you have photos from other angles of that bud you might want to check if it was actually a hole.

Unfortunately even if that's a cynipid exit hole on the bud, I wouldn't know what species caused it. There are a number of spring-generation cynipids that gall buds.
… Joyce Gross, 4 November, 2014 - 1:42am login or register to post comments

 
Thanks for the correction!
I still have the twig, I was meaning to take more photos of the small exit hole when I had the chance.
… Byrain, 4 November, 2014 - 9:33am login or register to post comments

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