AMDRO Ant Block Home Perimeter Ant Killer Bait gives you the power to kill listed ant species outside before they enter your home. Once you lay the Amdro ant bait, worker ants carry it back to the mound thinking it's food. Once the queen eats it, the colony is doomed because she can no longer produce worker ants. Use this DIY ant barrier pest control on lawns, landscaped areas or around structures. It creates a barrier around your home for maximum protection from ants and lasts up to 3 months. Each bottle contains enough ant killer to treat the average home up to six times. This outdoor ant killer granule bait is great for homeowners and property owners wanting a bait solution that kills ants and provides perimeter protection. These ant granules for outdoors are applicable for the following pest types: Acrobat ants, Allegheny mound ants, Argentine ants, Bigheaded ants, Black turf ants, Carpenter ants, Citronella ants, Cornfield ants, Crazy ants, Field ants, Fire ants (imported and native), Ghost ants, Harvester ants, Honey ants, Lawn ants, Little black ants, Nuisance ants, Odorous house ants, Pavement ants, Pharaoh ants, Pyramid ants, Southern ants, Thief ants, White-footed ants the Texas leafcutting ant.