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