Any kind of powder doesn't last in our rainy season. Plus, our ants are incredibly invasive and inventive. They live inside the walls and burrow behind rocks and in electrical channels. I have an exterminator come every 2 months but that just keeps them at bay, there is no getting rid of them. The leaf cutters I can put out bait and kill the colony, eventually another will move in from nearby. I'm convinced that ants, cockroaches and crab grass will inherit the earth.
