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Pyrethrins are nature pesticide produced by certain species of the chrysanthemum plant, the latin name Chrysanthemun cinerariifolium Bocc. Two pyrethrins are most prominent, pyrethrins I and pyrethrins II, the pyrethrins have another four different active ingredients, Cinerin I and II, Jasmolin I and II. The natural pyrethrins are contact poisons which quickly penetrate the nerve system of the insect. It¡ ¯ s a broad spectrum insecticide, and recommended as the safest pesticide in the world.

Pyrethrins is a contact insecticide accacking the nervous system of insects almost immediately and causing knockdown, soon followed by kill. The structure of the molecule is so complex that insect resistance to Pyrethrins is not a practical problem. It has a wider spectrum of activity against insect species than many single insecticides. So it can be used against any insect found in the house or garden, mosquitoes, flies, cockroaches, aphids, ants and so on. Besides Pyrethrins is a powerful insect repellent which in combination with its low mammalian toxicity favors it in many applications.