There are disclosed novel pyrimidone derivatives of the formula I: ##STR1## wherein X is hydrogen, chlorine, methyl or ethyl, R.sup.2 is hydrogen or methyl, and Q is ##STR2## A is fluorine, chlorine or bromine; and R.sup.1 is alkyl, alkenyl, alkynyl, alkoxyalkyl or haloalkyl. Also disclosed are a herbicidal composition containing a herbicidally effective amount of the compound (I) as an active ingredient and a method for exterminating undesired weeds by applying a herbicidally effective amount of the compound (I) to an area where the undesired weeds grow or will grow.
已披露了
化学式I的新型
嘧啶酮衍
生物:其中X为氢、
氯、甲基或乙基,R.sup.2为氢或甲基,Q为A,A为
氟、
氯或
溴;R.sup.1为烷基、烯基、炔基、烷氧基烷基或卤代烷基。还披露了一种含有化合物(I)的
除草剂组合物,该组合物含有除草有效量的化合物(I)作为活性成分,并且披露了一种通过将除草有效量的化合物(I)施用于杂草生长或将生长的区域来消灭不受欢迎的杂草的方法。