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Etymology: L, pestis, plague, caedere, to kill, potio, drink
n a toxic condition caused by the ingestion or inhalation of a substance used for the eradication of insects, fungi, and other pests.
a poison used to destroy pests of any sort. See arsenical, carbamates, chlorinated hydrocarbons, organophosphorus compound, pyrethroids.
pesticides are selective poisons chosen for use because of their relative safety for humans and animals. It is likely that they will poison these species if they are used in sufficient quantity or in special circumstances, for example when the water intake of the subject animals is limited.
continued use of a single agent, or a group of closely allied agents, can cause selective survival of insects with innate tolerance of the agent and lead to the development of a resistant population.
pesticide tissue residues
some pesticides have had to be withdrawn from use because of their persistence in the tissues of animals including humans. The passage of the agent in the milk of the animal is a comparable problem.