A condensed heterocyclic compound represented by formula (I) [wherein R1 represents a hydrogen atom, a halogen atom, a C1-C3 alkyl group which may have optionally one or more halogen atoms, a C1-C3 alkoxy group, a C2-C4 alkoxycarbonyl group, S(O)mR2, NR3R4, a nitro group or a cyano group R2 represents a C1-C3 alkyl group R3 and R4 independently represent a hydrogen atom or a C1-C3 alkyl group and m and n independently represent 0, 1 or 2] or an N oxide thereof has an excellent noxious organism control effect.
