Small mounds or hills of soil occur in the lawn. Each mound has a hole in the center. Ants scurry about. Ants live underground in hot, dry areas of the lawn. They do not feed on grass, but their mounds of soil smother and kill grass plants. As ants tunnel among grass roots, the soil may dry out, killing the plants. Ants feed on newly planted grass seed and sometimes store the seeds in their nests. Some ants, especially fire ants and harvester ants, bite people and animals. Most become a nuisance when they travel from their mounds and invade homes.
Once the ants have disappeared after treatment, level and reseed any bare or dead spots.