Abstract
The study objective is to study the effectiveness of lactic acid in varroatosis and its impact on the development of bee colonies under conditions of the South of Tyumen region. The acaricidal effectiveness of lactic acid was studied in October 2019 using one method in two experiments in 30 broodless bee colonies kept in two apiaries, where bee colonies were divided into 2 groups (experimental - 10 colonies and control groups of 5 colonies each). For treatment of bee colonies from the experimental group, frames with bees were removed from the hives in turn, which were sprayed with a 15.0% aqueous solution of lactic acid in the volume of 5 ml on each side of the honeycomb. Bee colonies were treated twice with an interval of 5 days. The bees in the control group were not treated. Dead mites were registered on a daily basis in all groups within 5 days after each treatment, for these reasons laminated cardboard sheets were placed on the bottom of the hives, which then were taken out and the number of fallen ectoparasites was recorded. Studies on the impact of lactic acid on the development of bee colonies were conducted in 20 brood bee colonies in the period from May to July 2020. It has been found that the effectiveness of treatment of experimental bee colonies with the drug was 90.0 ± 2.1% (apiary No 1) and 7.8 ± 1.9% (apiary No 2). At the same time, the maximum death of mites in colonies was observed during the first day after treatment. In the control groups, the number of mites decreased by 10.9 ± 0.8% and 11.6 ± 1.0%, respectively. It has been established that the treatment of bees with an aqueous solution of lactic acid in the above concentration, dose and multiplicity did not have a negative impact on the development of bee colonies, their strength and food supply, and no deaths of bees and queens were detected during the observation period.
Highlights
Diseases and pests of bees have harmful effect on the world beekeeping
The effectiveness of lactic acid for treating bee colonies against varroatosis was studied in two experiments using one method in October 2019 on 30 broodless bee colonies of two apiaries located in Tyumensky District (Fig. 2)
The study found that double treatment of broodless bee colonies with 15.0% aqueous solution of lactic acid by spraying frames with bees in the volume of 5 ml on each side of the honeycomb reduced the number of Varroa mites by
Summary
Diseases and pests of bees have harmful effect on the world beekeeping. The pathogenic agent of varroatosis, the mite Varroa destructor, is a vector of many pathogens of bacterial, viral and fungal infections, by contributing to mixed infections and infestations and the death of bee colonies around the world (Fig. 1).Fig.re 1. The pathogenic agent of varroatosis, the mite Varroa destructor, is a vector of many pathogens of bacterial, viral and fungal infections, by contributing to mixed infections and infestations and the death of bee colonies around the world (Fig. 1). The studies of acaricidal activity of lactic acid in varroatosis in different countries have shown different effectiveness of the drug (from 80 to 99.8 %), depending on the concentration of the active ingredient, dose, physiological state of bee colonies, season and climate. Based on the data obtained, most researchers recommended that lactic acid be used in order to treat bees against varroatosis in small apiaries due to the labour intensity of using the drug (Kraus & Berg, 1994; Colin, 1997; Wallner, 2003; Rosenkranz et al, 2010; Girişgin & Aydin, 2010; Galatyuk et al, 2015). In Soviet Union, the study of effectiveness of lactic acid against varroatosis was conducted at the
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
