Amdro Fire Ant Bait is the original fire ant killer. It kills visible and hidden fire ant mounds fast. Once you distribute a circle of bait around the mound, the worker fire ants carry it back to the colony to share it with the queen. After the queen eats it and dies, her colony dies with her. The granules are designed for individual mound treatment but can also be used for broadcast application in outdoor areas for total fire ant control. Amdro Fire Ant Bait kills fire ants, bigheaded ants, and harvester ants.