I use orthene which is 50% acephate (whatever that is) but it's a white pouder by Ortho for fireant destruction. It works but then they just pop up somewhere else. I must have 20 or 30 ant mounts out there. They search out any dry spot and up comes a mound. I dodn't think there is a way to permanently get rid of ants. They own the world and there are many more of them then us.
Today I broke a lot of pups of my older broms and replanted them in the mother plant vicinity for a more massive look. Eventually I'd like to have wall to wall coverage.