Disclosed is a novel harmful organism-controlling agent, particularly an insecticide or acaricide. An isoxazoline-substituted benzamide compound represented by the general formula (1) or a salt thereof； and a harmful organisms-controlling agent comprising the compound or salt: (1) wherein A1, A2 and A3 independently represent a carbon or nitrogen atom； G represents a benzene ring or the like； W represents an oxygen or sulfur atom； X represents a halogen atom, a C1-C6 haloalkyl group or the like； Y represents a halogen atom, a C1-C6 alkyl group or the like； R1 represents -CH=NOR1a, -C(O)OR1c, -C(O)NHR1d or a phenyl group substituted by (Z)p1, D-14, D-52, D-53, D-55 to D-59 or the like； R1a represents a C1-C6 alkyl group or the like； R1c represents a C1-C6 alkyl group or the like； R1d represents a hydrogen atom, -C(O)R15, -C(O)OR15 or the like； R2 represents a C1-C6 alkyl group, -CH2R14a, a C1-C6 alkynyl group, -C(O)R15, -C(O)OR15 or the like, provided that R2 may represent a hydrogen atom when R1 represents -CH=NOR1a, -C(O)OR1c or -C(O)NHR1d； R3 represents a C1-C6 haloalkyl group or the like； R14a represents a cyano group, -OR25 or the like； R15 represents a C1-C6 alkyl group, a C1-C6 haloalkyl group, a C1-C4 alkoxy(C1-C4)alkyl group, a C1-C4 alkylthio(C1-C4)alkyl group, a C3-C6 cycloalkoxy group, a C2-C6 alkenyl group or the like； R25 represents a C1-C4 alkyl group, a C1-C4 haloalkyl group, -C(O)R32, -C(O)OR32 or the like； R32 represents a C1-C6 alkyl group, a C3-C6 cycloalkyl group or the like； Z represents a halogen atom, a cyano group, a nitro group, a C1-C6 alkyl group, a C1-C6 alkoxy group or the like； m is an integer of 0 to 5； n is an integer of 0 to 4； and p1 is an integer of 1 to 5.本發明為提供一種新穎之有害生物防除劑，特別是作為殺蟲劑或殺蟎劑者。；其為以式(1)所表示異唑啉取代之苯甲醯胺化合物、其鹽、及含有其之有害生物防除劑者。；(1)；〔式中，A1、A2及A3為各自獨立表示碳原子或氮原子、G表示苯環等、W表示氧原子或硫原子，X表示鹵素原子、C1~C6鹵化烷基，Y表示鹵素原子、C1~C6烷基等，R1表示-CH=NOR1a、-C(O)OR1c、-C(O)NHR1d、被(Z)p1所取代之苯基、D-14、D-52、D-53、D-55~D-59等，R1a表示C1~C6烷基，R1c表示C1~C6烷基，R1d表示氫原子、-C(O)R15、-
