Pyrethroids: what is it?

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Pyrethroids what is it

Pyrethroids are found in insecticides, but also in mosquito repellents. © KaurJmeb, Wikipedia, cc by sa 2.5

Pyrethroids are found in insecticides, but also in mosquito repellents. © KaurJmeb, Wikipedia, cc by sa 2.5

The pyrethroids correspond to a group of organochlorine, organofluorine or organobromine compounds, the first of which were taken from the flower of pyrethrum or chrysanthemum, and used as insecticides or mosquito repellents or snakes.

Mode of action of pyrethroid pesticides

Pyrethroids are lethal in low doses to insects, while they are much less dangerous to mammals. Their toxicity depends on their ability to prevent the closure of sodium channels at the level of axons from neuronsthereby inhibiting the repolarization of nerve cells and the generation of a action potential : the neurons becoming inactive, the animal is paralyzed.

Types of pyrethroids

There are at least 24 different pyrethroids, which are classified into two classes, depending on whether or not a nitrile group is present. Among the most famous of these insecticideswe find in particular allethrin, the first pyrethroid synthesized, cyfluthrin or transfluthrin.

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