What is attacking my Sycamore?
If anyone knows what is in the pix below, please let me know. Whatever it is has already killed 3 trees on my street. The black spots appear below the peeling bark. Not sure if the holes are cause or effect. Are there bugs causing the black areas or are they just taking advantage of a weekend tree? The black areas are hard, almost petrified. I can dig my fingernail into the bark under a peeled part, but not into the black areas. Any help would be appreciated. We want to save our trees.
Thanks so much!!