Bark falling off my green ash
I have bark falling off my green ash but I DON'T suspect borers. I haven't found any signs of holes and there has been no other indication of borer action (no branch die back at the crown). There is, however, a colony of black ants that has taken up residence in the mulch below the tree. Also, we just went through a hot spell lasting about 9 days without any rain. I've been watering them every other day or so for the last couple days. Its twin across the yard is experiencing some yellowing of leaves at the top. These trees are fairly young (6-7 yrs old) and have been established in our yard for about 2 years now. Please tell me its just lack of rain and I'm not going to loose these trees!