Fire ants are a real problem in North Alabama. I remember as a kid one lower end of one pasture was so thick that you could walk across it jumping from mound to mound. Anyone thats been around them knows better than to do this. When I was 9 or 10 there were no fireants, when I was 14 to 15 was when they moved in. In less than 2 years that field was covered. My dad used a box blade on them and mixed them all together. They will kill ants from a differant coloney.That thined them out quite a bit. Now that I'm in my 40's I still fighting them. I go rid of them in my front yard by broadcasting, but this cost me about $80.00 and acre per year. This is way to expensive to do a whole pasture. I have tried most of the home treatments - gas, dish detergent, citrus juice, oil, and an occasional cussing. None of these worked but the cussing did make me feel better. I have done some research on this is the best thing I have found is to leave them alone. They are very territorial if a mound is established they will have a certain area that is their forage range. Another queen will not build in this established territory. If you do manage to kill one mound out or force them to move, several more will come in to claim the territory. It will be a smaller forage area but more mounds. The only ones I go after are those that are really a pain. Ones near gates of other areas I have to frequent. Those mounds are like iceburgs, most of it is underground. They use the mounds to move the eggs around to regulate the temperature. I have cut into a bank and saw them go down 15 feet. The dozer guy said he had saw them as deep as 35 feet. They don't go strait down but they build little chambers down under the mound. In the last few years we are starting to get armidillos. We didn't have these before I guess the climate is warming up. I have heard the armadillos dig the mounds up. I have saw a few that were disturbed but I don't know if that was what did it. It would have to be a onery little cuss to stay there and dig. If anybody has a better idea on the ants I would be willing to give it a try, but I havn't found anything that works. 30 years ago ants, 10 years ago armadillos, how many years before we have elephants around here.