Knowledgebase

Grape disease #873072

Asked June 14, 2024, 8:59 AM EDT

Looking for some help identifying what this is on my grapes

Washington County Minnesota

Expert Response

The unusual growths are galls caused by mites. Compare here:

https://www.inaturalist.org/taxa/626367-Vitisiella-brevicauda

Learn more about the galls and gall makers here:
https://ecommons.cornell.edu/server/api/core/bitstreams/9512e965-5340-4921-81c5-bd27ff601f15/content

An Ask Extension Expert Replied June 19, 2024, 12:09 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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