Insecticidal and repellent activity of the drug DELCID® 7.5 during wohlfahrtiosis in sheep

Abstract

In terms of natural and climatic conditions, the Stavropol Territory is favorable for the development of a number of ectoparasites on animals, which cause significant damage to the development of productive animal husbandry. One of the most common diseases in sheep breeding in the south of Russia is wohlfahrtiosis. This disease is caused by parasitizing of the Wohlfahrtia magnifica larvae, which can lay larvae on the scratches and wounds of the animal. In June 2021, a production experiment was conducted in Filimonovskaya stanitsa, Stavropol Territory, to test a drug Delcid® 7.5 for veterinary use during wohlfahrtiosis in sheep. All experimental animals (30 sheep) had skin damage after shearing and were invaded by W. magnifica. Three groups of 10 sheep each were formed. All sheep of the experimental group No. 1 with skin damage had one-time treatment with Delcid® 7.5 by applying it to the skin of the back, from the head to tail base along the spine, at a dose of 10 ml per animal. It was determined that the insecticidal effect occurred after 3 days, and the duration of the protective effect of the drug Delcid® 7.5 (serial number 040421O) against the W. magnifica, in which the COP was higher than 70%, lasted 35 days. The treatment of sheep from experimental group No. 2 was carried out by local application of the drug Delcid® 7.5 to the affected by W. magnifica larvae areas of the animal body with a cotton pad with an application rate of 0.2 ml/cm2. It was determined that the death of W. magnifica larvae occurred 60 minutes after the drug was used. The sheep of the control group No. 3 were infested during the entire experiment – 42 days.