A 3,5-Bis (substituted aryl) substituted isoxazoline compound of formula (2) or a salt thereof: wherein A1 is a carbon atom or nitrogen atom; X1 is selected from the group consisting of a halogen atom, —SF5, C1-C6haloalkyl, hydroxy C1-C6haloalkyl, C1-C6alkoxy C1-C6haloalkyl, C1-C6haloalkoxy C1-C6haloalkyl, C3-C8halocycloalkyl, C1-C6haloalkoxy, C1-C3haloalkoxy C1-C3haloalkoxy, C1-C6haloalkylthio, C1-C6haloalkylsulfinyl and C1-C6haloalkylsulfonyl; X2 is selected from the group consisting of a halogen atom, cyano, nitro, C1-C6alkyl, C1-C6haloalkyl, —OR5, —OSO2R5 and —S(O)rR5; Y is selected from the group consisting of a halogen atom, cyano, nitro, C1-C4alkyl, C1-C4haloalkyl, C1-C4alkoxy, C1-C4haloalkoxy, C1-C6alkylthio, C1-C6haloalkylthio, C1-C6alkylsulfonyl, C1-C6haloalkylsulfonyl, —NHR7 and —N(R7)R6; R is selected from the group consisting of a halogen atom, cyano, nitro, —NH2, halosulfonyloxy, C1-C6alkylsulfonyloxy, C1-C6haloalkylsulfonyloxy, phenylsulfonyloxy, phenylsulfonyloxy substituted with (Z)p1 and —C(O)Ra; m1 is an integer of 0 to 2; n is an integer of 0 or 1; p1 is an integer of 1 to 5; and r is an integer of 0 to 2.