Disclosed is a pest control composition having an excellent controlling effect on pests, which comprises pyriproxyfen and a compound represented by formula (I):wherein, R1 is a hydrogen atom or a methyl group, R2 is a hydrogen atom, a C1-C4 alkyl group, a C1-C4 haloalkyl group, or a (C1-C4 alkyl)carbonyl group, R3 is a hydrogen atom, a C1-C4 alkyl group, a C1-C4 haloalkyl group, or a (C1-C4 alkyl)carbonyl group, R4 is a hydrogen atom, a C1-C4 alkyl group, a C1-C4 haloalkyl group, or a (C1-C4 alkyl)carbonyl group, R5 is a hydrogen atom, a C1-C4 alkyl group, or a C1-C4 alkylamino group, R6 is a hydrogen atom or a methyl group, R7 is a methyl group or an ethyl group, R8 is an amino group, a C1-C4 alkylamino group, or a di(C1-C4 alkyl)amino group, and X1 and X2 are hydrogen atoms or X1 and X2 together represent a single bond.本發明揭露一種對有害生物具有優異防治效果之有害生物防治組成物,其包括百利普芬(pyriproxyfen)及下式(I)表示之化合物:式中,R1為氫原子或甲基,R2為氫原子、C1-C4烷基、C1-C4鹵烷基、或(C1-C4烷基)羰基,R3為氫原子、C1-C4烷基、C1-C4鹵烷基、或(C1-C4烷基)羰基,R4為氫原子、C1-C4烷基、C1-C4鹵烷基、或(C1-C4烷基)羰基,R5為氫原子、C1-C4烷基、或C1-C4烷基胺基,R6為氫原子或甲基,R7為甲基或乙基,R8為胺基、C1-C4烷基胺基、或二(C1-C4烷基)胺基,以及X1及X2為氫原子或X1及X2共同表示單鍵。
