Plant Diseases/Tree Disease
Hello. I have a tree, which I believe is some sort of ash, that has recently developed some strange brown spots on almost all of its leaves. The tree is somewhere around 8 years old and has been doing fine up until this year. We had a very wet and rainy spring and the tree really grew! I would estimate at least a foot of growth. It looked fine and was getting very bushy. I decided I would do some pruning to start shaping the tree. I removed some smaller branches along the bottom and from a few other spots. I was gone for a few weeks and during that time there was a normal amount of rainfall. When I got back and inspected the tree, I found almost every leaf had some strange brown all along the edges. It almost looks like the leaves were burnt around the edges because there is a black border around where the brown spots are. Do you have any thought about what might be happening to this tree? Did I damage it when I pruned it, or is it suffering some sort of disease or bug? Also, do you think this is an ash tree? I really appreciate your help and information. I have tried to attach some images of the tree and of some leaves. Thanks, Kevin
I don't think there is a bug or an infectious disease here. Browning that occurs along the edges is often an indicator of a root/soil related stress. This stress can be associated with a previous period of water/fertilizer imbalances. Just make sure that the tree gets adequate water w/o excesses. Be sure also to avoid any damage/injury to the trunk area from lawnmowers or string trimmers. Physical damage to the bark in this area can spell disaster.