Cornmeal is the quickest and cheapest way to kill ants. It is safe for the environment, children and pets, and does not attract other pests. Poor little piles of cornmeal near the anthill, the ants will take it home to share. The cornmeal cannot be digested by the ants and they die. It may take a week or so to see the entire colony gone, but it works. (Try coffee grounds too)
How to Kill Ants Without Pesticides Pesticides smell bad and are dangerous to humans, getting into ground water and contaminating wells. Here are some relatively benign way to kill ants using biodegradable materials.
Kill ants and their colonies in just a day. I had thousands of small red ants and large red ones around my front and backyard. Using just a ramekin mixed up 3 batches. Stir well, flip it upside down to avoid wind they were gone.
10 Ways to Use Baking Soda in the Garden Kill Ants Ants can be an enormous hassle for any gardener. Get the anthill damp and then pour baking soda on it. Half an hour later, add some vinegar to the anthill and the ants will ingest the mixture and die, making your garden ant-free!