An alkyl phenyl sulfide derivative represented by the general formula [I] or an agriculturally acceptable salt thereof ** (See formula) ** in the formula [I], n is an integer between 0, 1 or 2, R1 is a C1∼C6 haloalkyl group wherein the group excludes 2-bromoethyl group, a C2∼C8 alkenyl where the group excludes allyl group, a C2∼C8 haloalkenyl group, a C2∼C6 alkynyl group, a C2∼C6 haloalkynyl group, a branched C4∼C6 alkyl group wherein the group excludes isobutyl group, a C3∼C6 cycloalkyl group C1∼C6 alkyl or a C3∼C6 halocycloalkyl group C1∼C6 alkyl, R2 is a halogen atom, a C1∼C6 alkyl group, a C1∼C6 haloalkyl group, a C3∼C6 cycloalkyl group, a C3∼C6 halocycloalkyl group, a C1∼C6 alkoxy group, a C1∼C6 haloalkoxy group, a cyano group or a nitro group, R3 is a halogen atom, a C1∼C6 alkyl group or a C1∼C6 haloalkyl group, R4 is a C1∼C12 alkyl group wherein e The group may be mono or polysubstituted with R5, a C3∼C6 cycloalkyl group where the group may be mono or polysubstituted with R5, a C1∼C6 alkenyl group where the group may be mono or polysubstituted with R5, a C2 alkynyl group ∼C6 where the group may be mono or polysubstituted with R5 or a benzoyl group where the group may be mono or polysubstituted with R6, R5 is a halogen atom, a C1∼C6 alkyl group, a C1∼C6 haloalkyl group, a C3∼C6 cycloalkyl group wherein the group may be mono or polysubstituted with R6, a C3∼C6 halocycloalkyl group, a hydroxyl group, a C1∼C6 alkoxy group, a C1∼C6 haloalkoxy group, a C3∼C6 cycloalkoxy group, a C3∼C6 halocycloalkoxy group, a C1∼C6 alkoxy group C1∼C6 alkoxy, a C1∼C6 haloalkoxy group C1∼C6 alkoxy group, a C1∼C6 haloalkoxy group C1∼C6 haloalkoxy group, a C1∼C6 alkylsulfinyloxy group, a haloalkylsulfinyloxy group C1∼C6, a C3∼C6 cycloalkylsulfinyloxy group, a group C3∼C6 halocycloalkylsulfinyloxy, a C1∼C6 alkylsulfonyloxy group, a C1∼C6 haloalkylsulfonyloxy group, a C3∼C6 cycloalkylsulfonyloxy group, a thiol group, a C1∼C6 alkylthio group, a C1C6 alkylthio group , a C2∼C6 alkenylthio g
