A herbicide exhibiting high herbicidal activity against a variety of weeds and being highly safe for useful crops can be obtained through the use of a heterocyclic compound represented by the following general formula (I): ##STR1## wherein R represents a group represented by the following formula: ##STR2## X represents an oxygen atom or a sulfur atom; R.sup.1 represents a halogen atom or a lower alkyl group; R.sup.2 represents a hydrogen atom or a methyl group; R.sup.3 represents a halogen atom, a lower alkyl group, a lower haloalkyl group, a lower alkoxy group, a lower alkylthio group, a cyano group or --COOR.sup.4 (R.sup.4 is a lower alkyl group, a lower alkoxyalkyl group or a tetrahydrofurfuryl group); m is 0, 1 or 2 and n is 0, 1, 2 or 3.
通过使用以下一般式(I)所表示的
杂环化合物,可以获得对各种杂草表现出高除草活性并对有用作物高度安全的
除草剂:##STR1## 其中,R代表由以下公式表示的基团:##STR2## X代表氧原子或
硫原子;R.sup.1代表卤素原子或低级烷基基团;R.sup.2代表氢原子或甲基基团;R.sup.3代表卤素原子,低级烷基基团,低级卤代烷基基团,低级烷氧基团,低级烷基
硫基团,
氰基或--COOR.sup.4(R.sup.4是低级烷基基团,低级烷氧基烷基基团或
四氢呋喃基团);m为0,1或2,n为0,1,2或3。