| 摘要 |
The invention relates to 2-phenyl-2H-pyridazin-3-ones of the general formula I in which the variables R1, R2, X, Y and Z have the following meanings: X is halogen; Y is fluorine or chlorine; Z is oxygen; R1 is hydrogen or C1-C4-alkyl; R2 is chlorine, OR3 or NR4R5, in which R3, R4 and R5 have the meanings indicated in claim 1, Z can also be a group NR6 if R2 is a group OR7, in which R6 and R7 have the meanings indicated in claim 1, and to the agriculturally utilizable salts of compounds of the formula I. The invention furthermore relates to the use of compounds I and their salts as herbicides and/or for the desiccation and/or defoliation of plants, herbicidal compositions and compositions for the desiccation and/or defoliation of plants, which contain the compounds I and/or their salts as active substances, and processes for controlling undesired vegetation (weeds) and for the desiccation and/or defoliation of plants using the compounds I and/or their salts. |
