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.
DDT. DDT (dichloro-diphenyl-trichloro-ethane) is an insecticide that was first used worldwide in 1946 to increase agricultural production and to reduce disease vectors (carriers).Although formulated in 1874, DDT's insecticidal properties were not discovered until 1936.DT. DDT (dichloro-diphenyl-trichloro-ethane) is an insecticide that was first used worldwide in 1946 to increase agricultural production and to reduce disease vectors (carriers).