[Residue determinations in milk following application of the fasciolicides rafoxanide and hexachloro-p-xylene].

The control of Fasciola hepatica in dairy cattle may lead to considerable residue problems in dairying. In the GDR, a hexachloro-p-xylene-based fasciolicide has been approved till recently, and another, rafoxanide-based fasciolicide has been on trial. The investigations have shown that the two active principles are excreted in the milk for a prolonged period, rafoxamide being found more suitable. Their marked lipophil behaviour leads to accumulation in the fat phase and, thus, in high-fat milk products.