agrochemical
An agrochemical is a substance that is used in agriculture or horticulture.
nematicide
A substance used to destroy pests of the phylum Nematoda (roundworms).
insecticide
Strictly, a substance intended to kill members of the class Insecta. In common usage, any substance used for preventing, destroying, repelling or controlling insects.
(via organophosphorus insecticide )
pesticide
Strictly, a substance intended to kill pests. In common usage, any substance used for controlling, preventing, or destroying animal, microbiological or plant pests.
(via organophosphorus pesticide )
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