Gall on oak tree
I have what has been described as a gall infestation on my oak tree. Do you have any recommendations?
Certified GKH Gardening Expert
There are several types of galls that form on oak trees. Crown gall on the tree trunk could be a concern. Some are leaf or twig galls formed by mini-wasps to harbor their larvae. They are normally not damaging to the tree. There are usually no known controls and no real need to control. I don't know the oak varieties and common galls on oaks in your area like I do in my home state of California. But you can get local information through your county and univesity extension service, or from a local arborist.