| 摘要 |
Substituted pyridines of the formula <IMAGE> (I) in which A represents nitrogen or a C-X group where X represents hydrogen or halogen, Q represents oxygen or sulphur, R1 and R2 are identical or different and represent hydrogen, halogen, alkyl, halogenoalkyl, alkoxyalkyl, alkoxy, halogenoalkoxy, alkylthio, alkylamino or dialkylamino, R3 represents hydrogen, amino, nitro, hydroxyl, halogen, alkyl, halogenoalkyl, alkoxy, halogenoalkoxy, alkylamino, dialkylamino, alkylcarbonylamino, alkoxycarbonylamino or alkysulphonylamino, R4 represents hydrogen or alkyl and Z represents oxygen or one of the groups below: <IMAGE> where R5, R6 and R7 are defined herein and their use in herbicide compositions.
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