Strange growths on my Ash Tree
I have an 20 year old Autumn Purple Ash in my back yard which developed strange growths on the tips of the branches. They were green round growths 2-3 inches in diameter which are now still on the tree and are brown. I believe they are caused by mites. The tree has them on 2/3 of the branches. I do not want to lose the tree. What is my best course of action? The tree does need pruning also.
Arapahoe County Colorado trees and shrubs
It could be several things. Any chance you can send me some photos?
As an alternative, you can take a sample to the Arapahoe county extension office. (Cut off a 12 - 18 inch branch.) There is a small fee for them to diagnose the problem, but they might be more accurate than me diagnosing from a photo.
Here's their contact information.