Entomgenous nematodes kill fire ants, in fact all ants. Been doing it for years. Knocks out the queen the workers the soldiers and the brood. One nematode can travel 100 ft in any direction at the point of release. It only takes one to kill, but the dead ant will produce many more in a few days. Its a dominos effect that drives itself. The square foot recommendations by the suppliers is uniformed at best. They don't use the product. Ground cloth works down there work just fine. You want the weaved version, not the ones that look like window screen. You can keep ants out of compost piles too by using the proper plants to facilitate the compost aging.
