Name of the product: Metofluthrin 93%

Metofluthrin is an exciting novel pyrethroid discovered by Sumitomo

Chemical Co., Ltd.

It was registered in Japan in January 2005 and has now been under worldwide

development for envi- ronmental health use. Metofluthrin has extremely high

knockdown activity against various insect pests espe- cially mosquitoes, as

well as relatively high volatility and low mammalian toxicity. This is applicable

to not only existing formulations and devices such as a mosquito coil and a

liquid vaporizer, but also various new type products such as a fan vaporizer, a

paper emanator and a resin emanator. It is noted that knockdown activity of

Metofluthrin is more than 40 times higher than that of d-allethrin against

southern house mosqui- toes in a mosquito coil formulation. This paper

describes the discovery story, insecticidal efficacies in various formulations,

synthetic methods and safety evaluations of Metofluthrin.