Fire ants are picky eaters and any type poison that is effective takes seven feeding steps before the queen receives it.

Plus, if the bait is stored in close proximity to any petroleum or fertilizer products they won't touch it.  Contact poisons that are on the market just cause the colony to move away.  A well developed colony can be as deep as 30 feet and spread out some 20 to 50 feet from the mound center..  This has been documented by studies done in the early 60's when they were first sited in South Alabama.

An environmentally friendly cure for fire ants has been announced by Walter Reeves on his Georgia Gardener radio program. Testimonial that it REALLY WORKS are coming in.

Simply pour two cups of CLUB SODA (carbonated water) directly in the center of a fire ant mound.  The carbon dioxide in the water is heavier than air and displaces the oxygen which suffocates the queen and the other ants.  The whole colony will be dead within about two days.

Here's the other good side:  club soda leaves no poisonous residue, does not contaminate the ground water, and does not indiscriminately kill other insects.  Not harmful to your pets, soaks into the ground.  Each mound must be treated individually and a one liter bottle of club soda will kill 2 to 3 mounds.  Spread the word.