The Ultra Low Volume ( ULV ) insecticide application technique originated in the control of the desert locust in East Africa. Experiments were carried out shortly after World War II with solutions of DNOC and dieldrin in diesel fuel ( Maas, 1971 ). ULV is defined as volumes of 0.5 gallons or less per acre. Maas (1971) reported that this development moved into crop spraying with the use of DDT and oils, but its development was encouraged by the good results obtained by American Cyanamid in the application of undiluted malathion. American Cyanamid ( 1970 ) states appreciation is expressed to the Plant Protection Division, Agriculture Research Service, United States Department of Agriculture, ( now USDA Animal Plant Health Inspection Service, Plant Protection & Quarantine) for its assistance in developing the technical requirements for applying insecticide concentrates by aircraft. This ULV method ( American Cyanamid, 1970) was developed in 1963.