Disclosed is an arthropod pest control composition comprising 2-(2, 6-difluorophenyl)-4-[4-(1, 1-dimethylethyl)-2-ethoxyphenyl]-4, 5-dihydrooxazole and an inert carrier, wherein the volume median diameter of 2-(2, 6-difluorophenyl)-4-[4-(1, 1-dimethylethyl)-2-ethoxyphenyl]-4, 5-dihydrooxazole is from 1.5 to 5.9 μm.本發明揭露一種節肢動物害蟲防制用組成物,其包含2-(2,6-二氟苯基)-4-[4-(1,1-二甲基乙基)-2-乙氧苯基]-4,5-二氫噁唑及惰性載體,其中該2-(2,6-二氟苯基)-4-[4-(1,1-二甲基乙基)-2-乙氧苯基]-4,5-二氫噁唑之體積中值直徑為1.5至5.9微米。
