Weird bumps on leaves.

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robertsonj88 Edmonton, AB(Zone 3a) Jun 25, 2015

Does anyone know what this is on the leaves of the tree? Some of the leaves are curled together too. Thanks!

Thumbnail by robertsonj88
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Diana_K Contra Costa County, CA(Zone 9b) Jun 25, 2015

The bumps are called galls.
They are caused by any of several insects, diseases or mites.

Is this a maple tree?

http://msue.anr.msu.edu/news/what_are_these_ugly_bumps_on_my_trees_leaves

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weeding Peachtree City, GA(Zone 8a) Jun 25, 2015

Definitely Gall!

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robertsonj88 Edmonton, AB(Zone 3a) Jun 26, 2015

Yes it is a maple tree. Is there anything to rid/prevent or is it necessary?

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robertsonj88 Edmonton, AB(Zone 3a) Jun 26, 2015

Never mind I reread the article.

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