Knowledgebase
Oak tree #878204
Asked July 22, 2024, 9:03 AM EDT
St. Louis County Minnesota
Expert Response
Hi Todd,
This looks like damage from the oak shot hole leafminer. In healthy trees this is a nuisance cosmetic issue.
https://forestrynews.blogs.govdelivery.com/2021/07/06/oak-shot-hole-leafminer-and-spiny-oak-wawfly/
As the page indicates, by the time you notice the damage the bugs are gone.
Hope this helps.