Green Tip of the Week:  Stop ants
Natural deterrents to ants include dry Cream of Wheat, which they cannot digest and is lethal to them, as well as powdered borax mixed with maple syrup (don’t use the latter if you have children or pets). If the aim simply is to deter, but not kill, then sprinkle the substances they don’t like to cross, such as ground black pepper, chalk, or cinnamon, near doors.
See 1001 All-Natural Secrets to Pest-Free Property by Myles H. Bader for more natural solutions.