Amdro Ant Block Home Perimeter Ant Bait gives you the power to kill listed ant species outside before they enter your home. Once you lay the bait, worker ants carry it back to the mound thinking its food. Once the queen eats it, the colony is doomed because she can no longer produce worker ants. Use it on lawns, landscaped areas or around structures. Each bottle contains enough bait to treat the average home up to six times.