abstract |
ABSTRACT OF THE DISCLOSURE: 2'-Phenylhydrazino-2-cyanoacrylic acid esters of the formula I where R1 is chlorine or bromine, R2 is chlorine, bromine or iodine, R3 is chlorine or bromine and R4 is alkyl of 1 to 3 carbon atoms, allyl or propargyl, and herbicides containing these compounds. |