Herbicidal 1-arylpyrazoles, compositions and use

摘要

Herbicidal 1-arylpyrazoles of the formula <IMAGE> (I) in which R1 represents hydrogen or nitro, R2 represents hydrogen or alkyl, R3 and R4 independently of one another each represent alkyl, halogenoalkyl or optionally substituted aryl, Ar represents optionally substituted phenyl or optionally substituted pyridyl, x represents a number 0 or 1 and y represents a number 0 or 1.