Fast acting, long lasting fire ant control. The only dual-active bait that kills the worker and sterilizes the queen!Extinguish® Plus Fire Ant Bait is highly attractive to fire ants. It combines the killing speed of an adulticide (Hydramethylnon) and the long-lasting control of an Insect Growth Regulator (IGR) (S-Methoprene). The IGR sterilizes the queen and prevents rebound, while the fast acting adulticide kills problem worker ants. This two-way action ensures complete control of fire ants