<prompt> Not a synthetic pyrethroid insectiside -PropoxurPermethrinCypermethrinEtofenoprox  <response>: Ans. is a i.e., Propoxuro Inectisides are divided into:-A Fumigants : Hydrogen cyanide, SO2, methyl bromide, carbon disulphate.B Stomach poisons: Paris green, Sodium fluoride.C Contact nerve poisons: These are divided into -1 Natural: Pyrethrum, rotenone, Derris, nicotine, mineral oil.2 Synthetic: These are -i Organophosphates: Malathion, parathion, fenthion, diazinon, fenitrothion, abate, chlorthion, dioxathion, chlorpyrifos, trichlorfon.ii Carbamates : Carbaryl, propoxur, dimetilan, pyrolon.iii Organochlorine: DDT, BHC HCH, dieldrin, aldrin, chlordane, lindane, heptachlor.iv Synthetic pyrethroid pyrethrum derivatives : Pothrin, resmethrin, permethrin, biopermethrin, cypermethrin, cyphenothrin, cycloprothrin, deltamethrin, cyfluthrin, etofenoprox. 