To provide novel 3-triazolylphenyl sulfide derivatives having excellent soil treatment activity as insecticides, miticides or nematicides for agricultural and horticultural plants. 3-Triazolylphenyl sulfide derivatives represented by the formula [1]: wherein R is a cyclopropylmethyl group or a trifluoroethyl group, B2 is a hydrogen atom, a halogen atom or a methyl group, B4 is a halogen atom, a cyano group, a nitro group or a C1-C6 alkyl group, and each of A1 and A3 is a hydrogen atom, a halogen atom, a C1-C6 alkyl group which may be substituted or an amino group which may be substituted.本發明係提供適用為農園藝用植物殺蟲、殺蟎、殺線蟲劑,具有優良土壤處理活性之新穎的3-三唑基苯基硫醚衍生物。該3-三唑基苯基硫醚衍生物如一般式〔I〕所示,(式中,R為環丙基甲基或三氟乙基,B2為氫原子、鹵原子或甲基,B4為鹵原子、氰基、硝基或C1至C6烷基,A1及A3為氫原子、鹵原子、可受取代之C1至C6烷基、可受取代之胺基)。
