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Home » Guide » Arthropods (Arthropoda) » Unidentified Tracks, Sign, and Other Mysteries » Unidentified Galls
Photo#808875
Black Walnut Gall ID Request
Copyright © 2013 Thomas Wilson of Armistead Gardens in Baltimore City

Black Walnut Gall ID Request
Herring Run Watershed, Baltimore City County, Maryland, USA
June 15, 2013
Observed on Juglans nigra.

Top of leaf.

P.S. My apologies for the poor image quality on this one.

Images of this individual: tag all
Black Walnut Gall ID Request Black Walnut Gall ID Request
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Contributed by Thomas Wilson of Armistead Gardens in Baltimore City on 21 July, 2013 - 9:24pm

Fungal Disease Identification: upper leaf surface symptoms
This is Downy Leafspot on walnut (Juglans spp.) produced by the fungus Pseudomicrostroma juglandis (syn. Microstroma juglandis).
… Joe Boggs, 3 July, 2019 - 5:20pm login or register to post comments

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