Permethrin

Permethrin is a synthetic pyrethroid. It mimics pyrethrin, a natural occurring chemical found in chrysanthemums. It is an acetyl colanase inhibitor so it disrupts the nervous system if the insect. There are many synthetic pyrethroids on the market. It is non-selective so be careful in applications to minimize the effect on beneficial insects. It was first used as a head lice treatment for humans. It has been put on the World Health Organization list of essential medicines because it will kill insects that carry disease. Insects can develop resistance to permethrin.

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Permethrin
Permethrin General Fact Sheet