Insecticides are chemicals that destroy or kill insects. Insecticides are of two types: Natural or Synthetic.
DDT (Dichloro diphenyl trichloroethane) is the most well known because of its being the first major synthetic pesticide and later its persistent toxicity.
Example of Synthetic Insecticides:
Organochlorines: Chlorine containing carbon, non biodegradable, persistent, fat soluble, show biomagnifications.
e.g.,DDT, BHC, Aldrin, Endrin, Dildrin, Endosulphane.
Organosulphates: Esters of phosphoric acid, Malathion, Parathion, Ethion, Tetra Ethyl Pyro Phosphate (TEPP) etc.
Carbamates: Derivatives of Carbamic acid, Bygon, Carbofuran.