Extinguish Plus Fire Ant Bait combines the killing speed of an adultcide (Hydramethylnon) and the long lasting control fo an insect growth regulator (IGR) (S-methoprene). The IGR sterilizes the queen and prevents rebound, while the adultcide kills problem worker ants. The two way action helps ensure complete control of fire ants. Extinguish Plus Fire Ant Bait starts killing ant immediately after ingestion. Can be used a broadcast application or to treat individual mounds.