Knowledgebase
Walnut Tree Problem #875080
Asked June 28, 2024, 10:47 AM EDT
St. Clair County Michigan
Expert Response
It looks like an issue with blister mites. You can read more about them at https://ipm.ucanr.edu/agriculture/walnut/walnut-blister-mite/#gsc.tab=0
The damage looks bad but luckily it is just aesthetic--hopefully it will lessen in the coming seasons if conditions are less desirable for mites.
Best,
Erin