An ester compound represented by formula (1): wherein R1 represents hydrogen, fluorine, C1-C4 alkyl, C1-C4 alkoxy, C1-C4 alkoxymethyl, or C1-C4 alkylthiomethyl R3 represents hydrogen or methyl, R4 represents hydrogen or C1-C4 alkyl, and R5 represents hydrogen or C1-C4 alkyl has an excellent pest control effect and is therefore useful as an active ingredient of a pest control agent.一種式(1)所式之酯化合物:其中,R1係表示氫、氟、C1-C4烷基、C1-C4烷氧基、C1-C4烷氧基甲基、或C1-C4烷硫基甲基;R3係表示氫或甲基;R4係表示氫或C1-C4烷基;以及R5係表示氫或C1-C4烷基。該化合物具有優異的蟲害防治效果,因此,可用作為蟲害防治劑的活性成分。
