The ants do not eat the leaf fragments, but take them into cavities where they use the material to raise a fungus garden. These ants have highly refined habits and raise one particular type of fungus. Certain workers attend the fungus garden at all times and weed out or destroy other types of fungi that start to grow on the material. As the fungus grows, certain parts of it are eaten by the ants and fed to the larvae. This fungus is their only known source of food.
Orthene dust is the recommended chemical control.