Starbar Fast-acting. long-lasting fire ant control Controls and eliminates colonies without colony relocation Approved for indoor and outdoor use Starts killing ants immediately after ingestion Destroys visible and hidden colonies Stops young colonies from developing into problem colonies Can be used as a broadcast application or used to treat individual mounds 4.5 lbs 24550 Extinguish Plus Fire Ant Bait combines the killing speed of an adulticide (Hydramethylonon) and the long-lasting control of an insect growth regulator (IGR) (S-methoprene). The IGR sterilizes the queen and prevents rebound, while the adulticide kills problem worker ants. This two-way action helps ensure complete control of fire ants. Extinguish Plus Fire Ant Bait starts killing ants immediately after ingestion.