Jun 22, 2013 - 11:22 AM
You could try using Advance Carpenter Ant Bait, and applying it into the hole where the branch broke off. Also scattering it around the base of the tree.
I would not use any spray insecticides on the tree, it could cause the leaves to drop, and the ant colony to divide into new colonies.
You could also try the KM Ant Pro System placed around the tree.
Be careful, you don't want to make things worse, or yet, do any damage to the tree.
Sprays may be tempting to use, but can cause a lot of problems.
Here is a link to our carpenter ant page. Hope this helps.