Abstract: A substituted alkenylbenzene compound of formula (4): wherein X1 is selected from the group consisting of a halogen atom, —SF5, C1-C6haloalkyl, hydroxy C1-C6haloalkyl, C1-C6alkoxy C1-C6haloalkyl, C3-C8halocycloalkyl, C1-C6haloalkoxy, C1-C3haloalkoxy C1-C3haloalkoxy, C1-C6haloalkylthio, C1-C6haloalkylsulfinyl and C1-C6haloalkylsulfonyl; X3 is selected from the group consisting of a hydrogen atom, halogen atom, cyano, nitro, C1-C6alkyl, C1-C6haloalkyl, C1-C6alkoxy and C1-C6alkylthio; X4 is selected from the group consisting of a hydrogen atom, halogen atom, cyano, C1-C4alkyl, C1-C4alkoxy and C1-C4haloalkoxy; R3 is —C(R3a)(R3b)R3c, where R3a and R3b independently of each other are a halogen atom, or R3a and R3b together form 3- to 6-membered ring together with the carbon atom bonding them by forming a C2-C5haloalkylene chain, and R3c is selected from the group consisting of a hydrogen atom, halogen atom.