Combat 27 Gram Ant Killing Gel. It kills ants and the colony within hours and lasts up to 1 month. It is effective against Argentine, carpenter, cornfield, pharaoh, white footed, odorous house, pavement, and little black ants. Foraging ants return to the colony and feed the bait to larvae and queens, killing the entire colony through the domino effect. It contains fipronil and comes with an applicator.