Pest control refers to the regulation or management of a species defined as a pest, and can be perceived to be detrimental to a person’s health, the ecology or the economy. A practitioner of pest control is called an exterminator.The use of living organisms to control pests is called BIOLOGICAL PEST CONTROL.Dichloro Diphenye Trichloroethane[DDT],Benzene Hexachloride[BHC] and Malathion are commonly used pesticides.