Question
Hello
I have a japanese green maple tree that has black spots on its bark. I am not sure if this is normal or should I be concerned that the tree has disease or fungus?
Thank you

Answer
Hi Laurie:

From your description, I do not think these spots represent an insect nor disease, however if you can send along a photo, it may be helpful. These spots may merely be a lichen.  If the tree otherwise looks good, I would not be overly concerned.  Check the spots out closely to look for any holes within this area that are "leaking" a liquid.  If so, this could be an insect.

Regards
Steve