A cheap wipe-out for fire ants is a mix of a cup of gasoline, a cup of the cheapest liquid detergent you can find, and five gallons of water. I drag a bootheel through the mound, and sprinkle about a gallon from one of those "rainwater" sprinkling-type water cans used on flowerbeds.
So far, so good. I've had no problem in keeping a south Georgia yard free of the little devils.
Ambro will do in red ants, I'm told by a neighbor.
You're from BATFE? Come right in! I use all your fine products!