KARATE is a new photostable pyrethroid, active against a broad spectrum of pests which can be used to give rapid knockdown or persistent protection. It is a contact, residual and stomach-acting insecticide with repellency properties, but it is neither fumigant nor systemic. KARATE has given excellent control of caterpillars, beetles, weevils, aphids, and other sucking pests when used at 0.005-0.03 lb ai/A and is not phytotoxic to a wide range of crops under normal conditions of use. These factors, combined with KARATE's, minimal hazard to beneficial organisms in practice and safety to the user, make the compound a significant discovery for combating arthropod pests worldwide.