Diaryltriazole derivative or its salt; insecticide, miticide, nematicide or soil pesticide containing it; and process for its production

To provide a novel insecticide, miticide, nematicide or soil pesticide. The present invention provides an insecticide, miticide, nematicide or soil pesticide containing a diaryltriazole derivative of the formula (I) or its salt, as an active ingredient: wherein R1 is alkyl which may be substituted by halogen, alkenyl which may be substituted by halogen, or alkynyl which may be substituted by halogen, R2 is phenyl which may be substituted by X, or pyridyl which may be substituted by X; X is halogen, alkyl, haloalkyl, alkenyl, alkynyl, alkoxy, haloalkoxy, alkylthio, amino, nitro or cyano; each of R3 and R4 which are independent of each other, is a hydrogen atom, halogen, alkyl, alkenyl, alkynyl or cyano; R5 is alkyl which may be substituted by A, alkenyl which may be substituted by A, or alkynyl which may be substituted by A; A is halogen, cyano or cycloalkyl; and n is 0, 1 or 2.