We have lots of fire ants here in eastern NC. I have thought about this for years. Never came up with any solution. You know these ants go pretty deep and the only to kill them is catch em on top of the ground. In order to reproduce they build mounds on the surface as incubators for there eggs. These eggs are taken down into the nest at night. I think if you can come up with a way of destroying these eggs while they are in the incubators, the ants would continue to lay more. Maybe they would leave for better pastures. We have automatic robotic vacuums for our homes. Why not make some that would target these mounds during the day time and keep them knocked down. Just a thought. Anyone want to add to this?