There are disclosed novel pyrimidone derivatives of the formula:
 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.
                            公开了式中的新型
嘧啶酮衍
生物:
 还公开了一种除草组合物,其中含有除草有效量的化合物(I)作为活性成分,以及一种通过将除草有效量的化合物(I)施用到杂草生长或将要生长的区域来消灭有害杂草的方法。