Our Catalpa tree is about 25 feet tall and has been healthy up until this year. The bark started to bulge and is now cracking and falling off near the bottom. I can clearly see ants entering at the bottom of the tree, and as bark falls off, there is evidence of something boring underneath. The foliage appears healthy at the moment, but I fear this issue will continue to get worse if I don’t intervene ASAP. From the pictures, is anyone able to diagnose this issue, and perhaps suggest a remedy?