Which amongst the following is not a pesticide?

Dichlorodiphenyltrichloroethane (DDT) is an insecticide used in agriculture. Dieldrin a decades-old chlorocarbon insecticide that has long been banned from use in most of the world. It was introduced in 1948 by the now-defunct J. Organophosphates are a group of human-made chemicals that poison insects and mammals. Organophosphates are the most widely used insecticides today. They are used in agriculture, the home, gardens, and veterinary practice.

These days, the pesticide industry has shifted its attention to herbicides such as sodium chlorate $( {NaClO}_{3} )$, sodium arsenite $( {Na}_{3}{AsO}_{3} )$ and many others.