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Insecticides (from armor. insectum — an insect and caedo — I kill), chemical means of fight against harmful insects. Depending on ways, which And. get into an organism of an insect, divide them into 4 groups: intestinal And., getting to an organism of an insect through a mouth — the majority of inorganic compounds of arsenic (arsenates of calcium, magnesium, barium, lead, calcium arsenite), kremneftorida and fluorides of metals, thiobiphenyl amine and group of special preparations (an eylana, mitin, irgan, etc.) applied to protection of wool and fur from destruction by a moth; contact And., getting into an organism of an insect through integuments — organic compounds of phosphorus, chlorine, nitrogen and sulfur, pyrethrins and pyrethroids; system, or intra vegetable, And. are absorbed by roots and leaves of plants, move on vascular system with nutrients and do plants poisonous for the parasitizing insects — metilmerkaptofos, fosfamid, etc. System And. (fosfororganichesky) use also for fight against ektoparazita of animals (after introduction of a preparation blood of an animal becomes toxic for insects), for deratization (perish an animal — the tank of an infection and carriers parasites).
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