| abstract |
ABSTRACT OF THE DISCLOSURE Compositions useful in controlling fish parasites containing at least one substituted 1,2,4-triazinediones of the formula in which R1 represents optionally substituted aromatic radicals, or represents optionally substituted heteroaromatic radicals which are linked via carbon, X represents O, S, SO, SO2 or R2 represents one or more identical or different radicals from the group comprising hydrogen, halogen, nitro, alkyl, alkoxy, halogenoalkyl, halogenoalkoxy, R3 represents hydrogen, optionally substituted alkyl, alkenyl, alkinyl, aralkyl and their salts with bases. |