Unsuccessful control generally is due to the presence of green grass or failure to prebait. Fumigants Use fumigants when additional control is required. Aluminum phosphide and gas cartridges are legal for use in Colorado. Trade names for aluminum phosphide include Phostoxin, Gastoxin and Fumitoxin. Aluminum phosphide is classified as a restricted use pesticide and gas cartridges are classified for general use.
Fumigants are most effective when used in moist soils in early spring.
Product labels vary among manufacturers and with time. Carefully follow current label directions. Aluminum phosphide is classified as a flammable solid. Transportation of aluminum phosphide is governed by the U.S. Department of Transportation rules and regulations. These regulations are subject to change.