Efficacy of Insecticidal Cyflunit Against Melophagosis of Sheep in the Altai Mountains

The sheep ked (Melophagus ovinus) is widespread on livestock farms of the Altai Mountains. Since the disease causes significant damage to sheep farming, there is a need for regular insecticidal treatment of animals. The purpose of this research was to characterize the insecticidal activity of Cyflunit against the sheep ked on treated and untreated animals in contact with the parasite. The study was carried out on the "control test" principle; 2 experimental groups of 20 Altai Mountains sheep weighing 40–50 kg were formed. The control group of sheep was not treated with the drug. The drug was applied to the back skin of the sheep in a dose of 5 mL. Twenty animals out of 70 flock ewes were treated with the drug, and the rest of the animals remained exposed. The drug efficacy was evaluated by counting the sheep ked in the experimental and control groups at 15 and 30 days after insecticide application. Subsequently, the drug protective action coefficient (PAC) was calculated. A single treatment of the sheep with Cyflunit provided 100% protection against melophagosis for 30 days. In the exposed group of untreated sheep in the flock, the strength of protective effect of the drug was 98.7% at 30 days.