Herbicidal compositions comprising, as active ingredient, a diphenyl ether derivative of formula
wherein R, represents a hydrogen or halogen atom or an alkyl or haloalkyl group; R2 and R3 each independently represents a hydrogen or halogen atom or an alkyl, haloalkyl, nitro or cyano group; and the substituents A and B have the meanings as defined in the text; the use of such diphenyl ethers as herbicides; certain novel diphenyl ethers within formula I and their preparation.
杀草剂组合物,其活性成分包括式 2 的
二苯醚衍
生物
其中 R 代表氢原子、卤素原子或烷基或卤代烷基;R2 和 R3 各自独立地代表氢原子、卤素原子或烷基、卤代烷基、硝基或
氰基;取代基 A 和 B 的含义如文中所定义;此类
二苯醚作为
除草剂的用途;式 I 中的某些新型
二苯醚及其制备方法。