hackberry

This fissure recently appeared in my hackberry. It runs 2/3 the length of the tree, which is 2.5 stories tall. It's very near my house. What to do? Remove it or treat somehow? How urgently should I act? Thanks in advance for your help.

We've noticed that a tree fungus of some sort has been growing around an old Hackberry Tree where an old lightning rod cable had eventually grown into the trunk of the tree. We've since gotten new cabling placed on the tree to avoid strikes. It's been present at the location about 3 months at...