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Insect gall on grape leaf

Grape Phylloxera


I have no idea what this is, perhaps an insect or a fungal infestation of a what I think is wild grape leaf. Any help with identification would be appreciated.


Border of woods in southeastern PA USA

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ForestDragon 9 years ago

Neat find! This would be a good addition to my new mission for Arthropod Galls!

Mostly Microbe
Mostly Microbe 11 years ago

Thank you for the suggestion KarenL.

And thank you dandoucette for the link. I haven't read the whole article on Phylloxera yet, but from what I did read in scanning the wiki article, it does sound like that's what it is. I had never heard of an insect gall before!

Dan Doucette
Dan Doucette 11 years ago

This is an insect gall, possibly caused by Grape Phylloxera.

KarenL 11 years ago

Looks like some kind of gall - maybe grape tumid gallmaker?

Mostly Microbe
Spotted by
Mostly Microbe

Pennsylvania, USA

Spotted on Sep 16, 2011
Submitted on Oct 4, 2011

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