In my area the ants will colonize old tree stumps. Any tree I take down gets stumped flush with the ground. For me grinding the stump isn't real practical but if you can do it.
I have had luck with ortho boric acid a refined form of Borax.
When people look for ways to control bugs at home, borax and boric acid are often looked to for a solution. But are they useful? More importantly, are they
www.bugtech.com
Do not eat, or allow pets or animals to eat.
Direct contact is the key, find their raceways and where they are going. Humming bird feeder anyone?
YMMV