5 - (2 - chloro - 4 - trifluormethylphenoxy) - 2 - nitro - alpha - substituted acetophenone, oximderivate, manufacturing processes and techniques of herbicides to combat weeds.

摘要

5-(2-chloro-4-trifluoromethylphenoxy)-2-nitro- alpha -substituted-acetophenones and oxime derivatives thereof represented by the formula CHEM wherein R1 and Y are as defined in the disclosure, process for the preparation thereof, herbicidal composition and method for the destruction of undersirable weeds. The herbicides comprising the above compounds are capable of selectively controlling undesirable weeds among desirable crop plants.