DISCLOSED IS A HARMFUL ARTHROPOD CONTROL COMPOSITION COMPRISING, AS AN ACTIVE INGREDIENT, A FUSED HETEROCYCLIC COMPOUND REPRESENTED BY FORMULA (1) [WHEREIN A1 AND A2 INDEPENDENTLY REPRESENT A NITROGEN ATOM OR THE LIKE R1 AND R4 INDEPENDENTLY REPRESENT A HALOGEN ATOM OR THE LIKE R2 AND R3 INDEPENDENTLY REPRESENT A HALOGEN ATOM OR THE LIKE R5 AND R6 INDEPENDENTLY REPRESENT A LINEAR C1 -C6 HYDROCARBON GROUP WHICH MAY BE SUBSTITUTED, OR THE LIKE (PROVIDED THAT BOTH R5 AND R6 CANNOT REPRESENT A HYDROGEN ATOM SIMULTANEOUSLY) AND N REPRESENTS 0 OR 1].THE HARMFUL ARTHROPOD CONTROL COMPOSITION HAS AN EXCELLENT EFFICACY TO CONTROL HARMFUL ARTHROPODS.
