I don’t care what the local ag extension office says: pesticides are poisons and leach into groundwater. You poison your yard, you poison yourself.
There’s a better way: Malt-o-Meal.
Yep, that same crud my mom used to make me eat as a kid. Well, now it’s my best friend. I heard about this at Sea World (before I saw how cramped and sad the animals were and stopped going). Of course, I can find nothing to footnote that online. Oh well. Just try it. Word is, these ants are like pigeons: when the food they put into their gross little anty faces starts to expand, they can’t burp it up. Nothing like an alien malt-o-meal jumping out of your exoskeleton. Ew. Grits and some other breakfast cereals may work, too.
And if that doesn’t work, A&M is already releasing the ants’ natural predator, a fly that makes the ants into zombies. I support zombification plans! Except, this one sounds a little cane-toady to me…