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Gambel Oaks #475920

Asked August 05, 2018, 10:40 AM EDT

One of our Gambel Oaks has a growth or infestation. I want to know what it is, how I can treat it, and if it will spread to my other Gambel oaks.

El Paso County Colorado

Expert Response

Thank you for your question. The growths on your oak look like galls to me. Information about galls in contained in the links below.

Gamble Oak general information - https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1905&context=extension_curall

Gouty oak gall - http://www.missouribotanicalgarden.org/gardens-gardening/your-garden/help-for-the-home-gardener/advi...

An Ask Extension Expert Replied August 11, 2018, 2:07 PM EDT

This work is supported in part by New Technologies for Ag Extension grant no. 2020-41595-30123 from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.

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