Can you tell from these pictures what is affecting the leaves/tree? It is not...

Asked September 19, 2013, 4:37 PM EDT

Can you tell from these pictures what is affecting the leaves/tree? It is not affecting all leaves on all trees. Some trees are worse than others. I only have white oak and pin oak, I think.

Ramsey County Minnesota trees and shrubs galls horticulture

1 Response

You have oak galls, see this link for more information, they are nor harmful.
http://www1.extension.umn.edu/garden/insects/find/insect-and-mite-galls/