Ester compounds and use thereof

Provided is a compound having an excellent noxious organism control effect. An ester compound represented by general formula [chemical formula 1] (I) [wherein R1 represents a hydrogen atom or a methyl group; R2 represents a methyl group when R1 represents a methyl group, or R2 represents a group represented by general formula [chemical formula 2] (II) (wherein X and Y may be the same as or different from each other and independently represent a hydrogen atom, a halogen atom, a cyano group, an alkyl group having 1 to 4 carbon atoms, an alkocycarbonyl group having 2 to 5 carbon atoms, or a haloalkyl group having 1 to 4 carbon atoms) when R1 represents a hydrogen atom; R3 represents a hydrogen atom, a trifluoromethyl group, a methyl group, a methoxy group, a methoxymethyl group, an allyl group, an ethynyl group or a propargyl group; and R5 represents an alkyl group having 1 to 4 carbon atoms when R4 represents a fluorine atom, or R5 represents the same substituent as R4 when R4 represents an alkyl group having 1