CombatÂ® Ant Killing Bait Strips help get rid of ants. These ant killing bait strips are formulated to attract ants quickly – acting as a necessary food and water supply for ants. Its fast-acting insecticide, Fipronil, one of the most powerful ant killers, starts to exterminate ants in hours. Worker ants return to the colony and feed the bait to the larvae and to the queen, eliminating the entire ant colony. CombatÂ® Ant Killing Bait Strips are easy to use so you can apply the new discreet design in hard-to-reach places. CombatÂ® Killing Bait Strips is effective against Argentine, Cornfield, Odorous House, Thief, Pavement, White Footed, and Little Black Ants.