- Get two shovels (long-handled might be a good idea, or just be fast).
- Each person goes to a mound at a sufficient distance from each other (so the colonies are not related/connected underground – this is essential).
- At the same moment take a BIG shovelful from each mound and (moving rapidly!) exchange them (put them where the other was).
Being the aggressive creatures they are this will start localized “ant wars” as the relocated ants attempt to defend themselves & also destroy the queen where they have been put. I have heard it is very successful.
Another idea I read about is to pour urine on the mounds – regularly (guys, take note). I believe I read that certain cattle ranchers found there were fewer ants in the fields heavily used by cattle, leading to the discovery that it urine that discourages them.
Of course, this post only addresses fire ants in a limited way, so for a more exhaustive discussion of methods in more areas than just your lawn, go to: http://www.fireant.net/Control/
All of the methods mentioned are environmentally friendly. Some examples are: Splenda (you may never want to eat it again when you find out why), boric acid mixed with powdered sugar, nematodes, Phorid flies, diatomaceous earth (what they don’t mention is to use the garden version, not the stuff from swimming pool suppliers), garlic, dry ice, lye, and various baits.
Based on my stats, this is a topic of concern, so if you have some success (and if you remember) come back a let other readers know what you did and how it ultimately worked.