Spraying the plant directly controls sucking insect pests such as aphids, as well as ants on the plant. Be sure that the infested plant is listed on the label. Lawn Ants are a problem in lawns because of the mounds they build in making their nests, not because they feed directly on the grass. The mounds of soil smother and kill grass plants. Underground, ant tunnels may cause roots to dry out, killing the grass.
Some ants can be a nuisance by biting people and pets.
The product you choose depends on your particular ant problem, where the ants are located, your personal preference and the equipment you own. Many insecticides list ants on the label, so select carefully and follow directions given on the product labels. Ant Killer Bait. Controls grease and sweet eating ants. Ants enter the trap and carry food back to the nest.