PIC Ant Killing Systems has been the effective method for destroying ants for years. Kills sweet & grease eating ants, pavement ants, odorous house ants and little black ants. Kill Ants (except fire ants, harvester ants, pharaoh ants and carpenter ants). Effective and easy to use. Made in USA. brbr.bHOW THE SYSTEM WORKS/b: The ants you see are Worker food providers to the Queen Mother and the larvae residing in the nest. The worker ants feed the colony and then themselves.