Could somebody tell me what this is?

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1lisac Liberty Hill, TX(Zone 8a) May 24, 2009

I have a mustang grape vine around myy garden and I noticed these growths on it does anybodys know what they are? Thanks!
Lisa

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ceejaytown The Woodlands, TX(Zone 9a) May 26, 2009

They are galls that are formed when a tiny insect lays an egg. The plant's response is to surround the egg...

Here's more information.

http://www.wildflower.org/expert/show.php?id=2201

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1lisac Liberty Hill, TX(Zone 8a) May 26, 2009

Thanks! I had forgotten all about posting this thread. That is really interesting I've never seen them on the grape leave before. A late freeze wiped out all the grapes so that's what I got instead.
Thank you,
Lisa

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