| abstract |
Diphenyl ether derivatives having the general formula I: <IMAGE> wherein R1 represents a hydrogen or halogen atom or an alkyl or haloalkyl group, R2 and R3, which may be the same or different each independently represents a hydrogen or halogen atom or an alkyl, haloalkyl, nitro or cyano group, X represents an oxygen or sulphur atom and A, B and D are as defined in the text; the preparation of such compounds, herbicidal compositions containing them and their use as herbicides. |