Cyclohexenone compounds of the formula ##STR1## where R.sup.1 is alkyl of 1 to 4 carbon atoms, alkenyl or alkynyl of 3 or 4 carbon atoms, haloalkenyl of 3 or 4 carbon atoms and 1 to 3 halogen substituents, or is thenyl which is unsubstituted or substituted by halo and/or alkyl, R.sup.2 is alkyl of 1 to 4 carbon atoms, and R.sup.3 is formyl, a radical of the general formula R.sup.4 XCHXR.sup.5, where X is oxygen or sulfur, and R.sup.4 and R.sup.5 are identical or different alkyl, or together denote alkylene of 1 to 4 carbon atoms and which is unsubstituted or substituted by alkyl, alkoxy, alkylthio, hydroxy, halogen, cyano or N,N-dialkylamino, have a good herbicidal action preferably on species from the grass family.
环己烯酮化合物的结构式为##STR1##其中R.sup.1是1至4个碳原子的烷基,3或4个碳原子的烯烃或
炔烃,3或4个碳原子和1至3个卤素取代基的卤代烯烃,或是未取代或取代为卤素和/或烷基的
硫代环烯基,R.sup.2是1至4个碳原子的烷基,R.sup.3是甲酰基,一般式R.sup.4 XCHXR.sup.5的基团,其中X是氧或
硫,R.sup.4和R.sup.5是相同或不同的烷基,或者一起表示未取代或取代为烷基、烷氧基、
硫代烷基、羟基、卤素、
氰基或N,N-二烷基
氨基的1至4个碳原子的烷基,对于草科植物有良好的除草作用。