abstract |
A description is given of 4-trifluoromethylpyrazolyl-substituted pyridines and pyrimidines of formula (I) and of their use as herbicides. n n nIn this formula (I) R 1 , R 2 , R 3 and R 4 are various radicals, A is an aromatic or heteroaromatic radical, and Z is a nitrogen or carbon atom. |