Scale on Oak leaves?

Asked August 6, 2019, 9:03 AM EDT

Good Morning. See attached pictures. This fuzzy scale seemed to be feeding on the leaf veins of a Pin Oak in Ellicott City. Just wondering if anyone can help identify. It was only present on lower watersprout growth.

Howard County Maryland

2 Responses

These are a type of gall. Here are photos of it on the Maryland Biodiversity Projects:
and here
It's caused by a wasp and does not merit treatment.

Here's more about galls, which have many causes: