Maxforce Quantum Ant Bait will remain effective for up to 3 months. Maxforce quantum is effective on most ant species including Argentine Ants, Pharaoh Ants, Ghost Ants, Crazy Ants, and Odorous House Ants. It can be used indoors and outdoors. Its revolutionary carbohydrate bait matrix  ensures it will continue to perform long after it is applied. Carpenter Ants, Fire Ants, and Harvester Ants are not controlled by this bait.