The disclosed composition for preventing/controlling harmful arthropods contains flonicamid at least one type of compound for controlling the growth of insects that is selected from Group (A) consisting of methoxyfenozide tebufenozide and chromafenozide and at least one type of compound for preventing/controlling sheath blight selected from Group (B) consisting of flutolanil pencycuron N [2 (1 3 dimethylbutyl)phenyl] 5 fluoro 1 3 dimethyl 1H pyrazole 4 carboxamide furametpyr and validamycin A and has an excellent effect of preventing/controlling harmful arthropods.
