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Pumpkin Gall Wasp (Dryocosmus minusculus)

The pumpkin gall wasp (Dryocosmus minusculus) induces miniature galls on the leaves of all of California's black oaks. These tiny "pumpkins" are only a millimeter in diameter, so you will need to examine upper leaf surfaces closely in order to find them. A hand lens is highly recommended!


Pumpkin gall wasp (Dryocosmus minusculus), gall on interior live oak (Quercus wislizeni). Stacked and stitched micro panorama of 824 exposures at 10x lifesize. Vacaville, Solano County, California, USA.
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Pumpkin gall wasp (Dryocosmus minusculus), gall on interior live oak (Quercus wislizeni). Focus-stacked composite. Lake Berryessa, Napa county, California, USA.
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Pumpkin gall wasp (Dryocosmus minusculus), gall shown with standard pencil tip for scale. Lake Berryessa, Napa county, California, USA.
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Next Gall: Red fold gall aphid (undescribed Aphididae)



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All images copyright Timothy Boomer. All rights reserved worldwide.