4-(3-Alkylthiobenzoyl)pyrazoles of the formula (I) are described as herbicides.In this formula (I), X, Y, R1, R2, R3and R4represent radicals such as hydrogen, organic radicasl such as alkyl, and other radicals such as halogen.本發明係有關作為除草劑之式(I)所示的4-(3-烷基硫基苯甲醯基)吡唑類化合物。式(I)中,X、Y、R1、R2、R3和R4表示例如氫之基團、例如烷基之有機基團、及例如鹵素之其他基團。