The term 'Banned Insecticide' refers to two specific chemicals, ALAR and DDT. ALAR (4 letters) is an acronym for Aminotriazole, a chemical used as a plant growth regulator and was banned in the United States in 1985 due to its potential carcinogenic effects. DDT (3 letters) is an acronym for dichlorodiphenyltrichloroethane, a pesticide used to control insects and was banned in the United States in 1972 due to its environmental effects. Both of these chemicals have been banned in many countries due to their potential health and environmental risks.