In our research to find new insecticides, we found out that 2-(trifluoromethy)-4-phenoxyphenyl 3,3-dichloro-2-propenyl ether, showed weak insecticidal activity against lepidopterous larvae. Optimizations of this lead compound led to the discovery of pyridalyl (PLEO?, S-1812) belonging to a new class of insecticides. Pyridalyl is being developed worldwide and the first market introduction is expected in Japan and some Asian countries in the years between 2004 and 2005. This compound gives very good control of various lepidopterous and thysanopterous pests on cotton and vegetables. Pyridalyl also controls insecticide-resistant strains of lepidopterous pests as well as susceptible strains. It produces unique insecticidal symptoms so that it may have a different mode of action from any other existing insecticides . Moreover, pyridalyl is safer to mammals and various beneficial arthropods and it will provide an important tool in IPM and insecticide resistant management programs.
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