The present invention provides a compound having an excellent efficacy for controlling weeds. A cyclohexanone compound of the formula (I): wherein m is an integer of 1, 2 or 3； n is an integer of any one of 1 to 5； X represents CH2, O, S, S(O) or S(O)2； R1 represents a hydrogen atom or a methyl group； R2 and R3 represents a hydrogen atom, a C1-6 alkyl group and the like； R4 represents a C6-10 aryl group or a five- to six- membered heteroaryl group； G represents a hydrogen atom and the like； Z represents a halogen atom, a cyano group, a nitro group, a phenyl group, a C1-6 alkyl group and the like； is useful as an active ingredient for herbicides.本發明提供一種具有用於防治雜草之極佳效力之化合物。一種式(I)之環己酮化合物：其中m為1、2或3之整數；n為1至5中任一者之整數；X表示CH2、O、S、S(O)或S(O)2；R1表示氫原子或甲基；R2和R3表示氫原子、C1-6烷基等等；R4表示C6-10芳基或五-至六-員雜芳基；G表示氫原子等等；Z表示鹵素原子、氰基、硝基、苯基、C1-6烷基等等；可用作除草劑之活性成分。
