abstract |
The invention relates to carboxylic acid derivatives of benzoheterocyclylpyridines and benzoheterocyclylpyrimidines of the general formula (I) and to the use of the same use as herbicides. In said formula (I), X represents N or CH, A represents a benzocondensate heterocycle, R1, R2, R3 and R4 represent groups such as hydrogen and organic groups such as alkyl. (See formula). |