<prompt> DDT is a type of:Natural insecticideSynthetic insecticideOrganophosphate insecticideNone of the above  <response>: DDT Dichloro-diphenyl-trichlorothane: DDT is a synthetic insecticide. First synthesized by: Ziedler Insecticidal propeies are discovered by: Paul Muller. DDT contains active component:para para isomer. Mechanism of action: Contact poison, inhibits Acetylcholinestrase enzyme. Types of insecticides: Natural insecticides : Pyrethrum ; Rotenone; Derris; Nicotine; Mineral oils. Synthetic insecticides: Organo-chlorlne compounds DDT;Methoxychlor; HCH BHC; Lindane; Chlordane; Heptachlor; Kepone; Mirex etc. Organo-phosphorous insecticides Chlohion ;Ronnel; Diazinon; Trichlorfon; Dioxathion; Dichlorvos; Demethoate; Abate OMS-786; Malathion OMS-1; Gardona; Fenthion OMS-2 ; Chlorpyrifos; Methyl parathion; Fenitrothion OMS-43; Parathion Dicapthon OMS-214 etc. Carbamates Carbary; Dimetilan; Pyrolan; Propoxur OMS-33 etc. Synthetic pyrethroids Resmethrin; Bioresmethrin; Pothrin etc. Repellents Meta-diethyltoluamide; Benzyl benzoate; Indalone; Dimethyl phthalate; Ethyl hexanediol etc. Stomach poisons: Paris green; sodium fluoride etc. Fumigants: Hydrogen cyanide; methyl bromide; sulphur dioxide; carbon disulphate etc. 