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Home » Guide » Arthropods (Arthropoda) » Unidentified Tracks, Sign, and Other Mysteries » Unidentified Galls
Photo#1784100
Gall on Arizona white oak
Copyright © 2020 Salvador Vitanza

Gall on Arizona white oak
Madera Canyon, Santa Cruz County, Arizona, USA
February 28, 2020
Size: 31 mm diameter
I don't know if this growth is caused by a pathogen or by an arthropod. There were many of these structures on an Arizona white oak, Quercus arizonica. The March 6, 2019 issue of "The Backyard Gardener", a University of Arizona Cooperative Extension publication, has an image of similar growths with the caption: "Twig and leaf galls found on Arizona white oak".
See: https://cals.arizona.edu/yavapai/anr/hort/byg/archive/oakgalls2019.html
Thanks for your help
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Contributed by Salvador Vitanza on 1 March, 2020 - 9:18pm
Last updated 19 July, 2020 - 12:04am

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… v belov, 19 July, 2020 - 12:04am login or register to post comments

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