Outlawed spray is a term used to refer to two specific chemicals, ALAR and DDT, which have been banned from use in many countries due to their negative environmental impacts. ALAR, or Alarum, is a plant growth regulator that was used to increase the size of fruit and vegetables. DDT, or dichlorodiphenyltrichloroethane, is an insecticide that was used to control pests. Both of these chemicals have been found to be toxic to humans and animals, and have been outlawed in many countries.