Toxic chemicals that are used to destroy pests are known as pesticides. Fungicides (which kill fungi), herbicides (which kill plants), and insecticides (which kill insects) are types of pesticides.
Classification of Pesticides :
Acarcides, Algicides, Bactericides, Bird repellents, Fungicides, Herbicides, Insect attractants, Insect repellents, Insecticides, Nematacides , Mamal repellents, Rodenticides , Virucides and plant growth regulators
Each major group of pesticides (e.g. herbicides or plant growth regulators) is subdivided into chemical or other classes (e.g. chloroacetanilide herbicides or auxins).