TERRO Perimeter Ant Bait Plus provides a granular baiting option to lure and kill ants and other insects outdoors. This easy-to-use shaker canister makes application a breeze. TERRO® Perimeter Ant Bait Plus is made up of weather-resistant granules that provide long-lasting protection for up to 4 weeks. It allows you to take care of outdoor infestations before they make their way into your home.