The best known method of pest control is pesticide application. Pest Controllers use two different types of pesticides?general use and restricted use. General use pesticides are the most widely used and are readily available; in diluted concentrations, they are available to the public. Restricted use pesticides are available only to certified professionals for controlling the most severe infestations. Their registration, labeling, and application are regulated by Federal law, interpreted by the Environmental Protection Agency (EPA), because of their potential harm to Pest Controllers, customers, and the environment.