(4) Organophosphates refers toa group of insecticides or nerveagents acting on the enzymeacetylcholinesterase. Commonlyused organophosphatesinclude parathion, Malathion,methyl parathion, chlorpyrifos,etc. Malathion is widelyused in agriculture, residentiallandscaping, public recreationareas, and in public healthpest control programs such asmosquito eradication.