The European Agency for the Evaluation of Medicinal Products Veterinary Medicines Evaluation Unit

1. Diflubenzuron, [1-(4-chlorophenyl)-3-(2,6-difluorobenzoyl) urea] is an acyl urea derivative for use in the treatment of sea lice (Lepeophtheirus salmonis) infestations in Atlantic salmon. Diflubenzuron is admixed as a 90% pre-concentrate in pelleted diet at a final concentration of 0.6 g diflubenzuron/kg. The intended oral dosage is 3 mg diflubenzuron/kg bw/day during 14 consecutive days. The substance is also used as a pesticide in agriculture.