Changes in reproductive indicators of drones when using drugs for the treatment of varroosis in bee families

Honey bees play a very complicated and significant role in the ecosystem. In recent years, they have been in the focus of many studies due to the progressive decline in their number. It is believed that pathogenic microorganisms and pesticides weaken the immunity of honey bees and affect their physiological state and development. Drones can also be exposed to impact of chemicals from the environment. Taking into the account reproductive quality of drones, most studies have focused on the effects of acaricides and insecticides on drone fertility and sperm quality. Many environmental and biotic factors can affect the reproductive quality of drones, such as age, season and genetics. This includes nutrition, which can affect the terms of drones’ puberty. The object of scientific research is drones of the breed type "Prioksky". The aim was to study the effectiveness of drugs for the treatment of varroosis on the reproductive performance of drones. For scientific experience, acaricidal preparations with different chemicals were used: amitraz, fluvalinate, thymol and oxalic acid. The quality of drone sperm in the control and experimental groups was assessed by the following indicators - morphology, viability, concentration and motility of drone sperm. At the end of the scientific study, the results were obtained, which indicated the impact of the tested drugs for the treatment of varroosis on the quality of drones. There is a decrease in viability, deformations of sperm heads increase. All this leads to a decrease in the reproductive ability of drones. The lowest indicators for the quality of drone sperm were observed in experimental group No. 3, treated with Bisanar with active substances - oxalic acid and thymol.