Herbicides - used for killing weeds or herbs. e.g, Gramoxone
Insecticides - used for killing insects. e.g. Sevin
Fungicides - used for killing fungi. e.g. mankocide
Nematicides - used for killing nematode e.g. Furadan
Rodenticides - used for killing rodents (rat,mice)e.g. Klerat
Acaricides - used for killing aracnids (mites) e.g. new mectin
Molluscocides - used for killing Molluscs (snails,slugs) e.g. Slugit
Click for more information on the Classification of Pesticides