5-[1-[4-(2 PYRIDYL-OXY OR THIO)PHENOXY]ETHYL] -1,3,4-THIADIAZOLE COMPOUNDS

摘要

A thiadiazole derivative represented by the formula (I): (I) wherein R1 and R2 independently represent hydrogen atom, halogen atom, lower haloalkyl group, lower alkoxycarbonyl group or cyano group, R3 represents hydrogen atom or halogen atom, R4 represents lower alkyl group, X represents oxygen atom or sulfur atom, as well as an insecticidal and miticidal composition containing the derivative as the effective ingredient are disclosed. The thiadiazole derivative according to the present invention has excellent controlling effect even against harmful insects and mites showing resistance to conventional insecticide.