PROBLEM TO BE SOLVED: To provide a novel substance useful for control of various insect pests.SOLUTION: There are provided a sulfoxyiminopyrazole derivative of the following formula (1) and an insecticide containing the same as an active ingredient. In the formula (1), where R1 represents a hydrogen atom, a halogen atom, a C1 to C4 alkoxy group, a C1 to C4 haloalkyl group, a C1 to C4 haloalkoxy group, a cyano group or a nitro group, R2 represents a C1 to C4 alkyl group or a C1 to C4 haloalkyl group, R3 represents a hydrogen atom or a C1 to C4 alkyl group, R4 represents a C1 to C4 alkyl group or a substituted or unsubstituted phenyl group, and X represents a hydrogen atom or a halogen atom. The compound expresses high controlling effect on various insect pests showing resistance to conventional insecticides with low dose. Therefore this is an insecticide having high safety which reduces problems such as residual toxicity or environmental pollution.COPYRIGHT: (C)2014,JPO&INPIT【課題】各種害虫防除に有用な新しい物質の提供。【解決手段】以下の式のスルホキシイミノピラゾール誘導体およびこれを有効成分とする殺虫剤。(式中、R1は水素原子、ハロゲン原子、C1~C4のアルコキシ基、C1~C4のハロアルキル基、C1~C4のハロアルコキシ基、シアノ基またはニトロ基を示し、R2はC1~C4のアルキル基またはC1~C4のハロアルキル基を示し、R3は水素原子またはC1~C4のアルキル基を示し、R4はC1~C4のアルキル基または置換若しくは非置換フェニル基を示し、Xは水素原子またはハロゲン原子を示す)。本化合物は従来の殺虫剤に対して抵抗性を示す各種害虫類に対して高い防除効果を示し、低薬量で効果を奏す。そのため残留毒性や環境汚染等の問題が軽減された安全性の高い殺虫剤である。【選択図】なし
