Portales is a city in and the county seat of Roosevelt County, New Mexico, United States. The population was 12,280 at the 2010 census. Portales is located near the larger city of Clovis as well as Cannon Air Force Base, a major contributor to the economy of the region. Eastern New Mexico University opened in Portales in 1934 and has grown to become the third largest university in the state.
Overview. DDT was widely used during the Second World War to protect the troops and civilians from the spread of malaria, typhus and other vector borne diseases. After the war, DDT was widely used on a variety of agricultural crops and for the control of disease vectors as well.
A portion of the contaminated oil was discharged directly intothe environment and caused environmental pollution (17).DDT was first used in Vietnam to combat malaria in 1949. The quantity of DDT used, however,was 315 tons in 1961 and decreased to just 22 tons in 1974.