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Insects cause unsightly galls on oak leaves - The Galveston County Daily News : Leisure

August 27, 2014

The Green Thumb Insects cause unsightly galls on oak leaves

Posted: Wednesday, April 9, 2014 12:25 am

Every year I receive numerous questions about strange, misshapen growths on the leaves or stems of trees. These growths, called galls, are often the result of insect egg-laying or feeding.

Galls themselves are tumor-like growths produced by the plant in response to chemicals injected into the plant by the larval stage of a gall-making insect.

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