Insects on Canada Red Chokecherry
I would like some help identifying what the insect is on the bark of my tree and what treatment might be needed. It seems to be spreading from the bottom of the tree to the top. There are 1000's of them and they cover all the bark of the lower tree. The tree seems to be healthy and I cannot see any clear damage yet. I have Volck oil but have not treated yet. Any ideas?