The effectiveness of lactic acid under varroatosis in the apiaries of Tyumen region

The research objective was to study the effectiveness of lactic acid in varroatosis in apiaries in the South of Tyumen Region. The studies were conducted in October, 2018 and 2019 according to the same scheme on 20 broodless bee colonies of two apiaries located in Tyumen district. The bees were kept in twelve-frame beehives with a removable bottom. In both experiments, bee colonies were divided in to 2 groups (experimental and control - 5 colonies each). For the therapy of bee families of experimental groups, the frames covered with bees were removed from the hives in turn, sprayed with a 15.0 % aqueous solution of lactic acid in the volume of 5 ml on each side of the comb. The families of control groups were not treated. The therapy of experimental bee colonies was performed twice with an interval of 5 days. The records of dead ticks were kept daily in all groups for 5 days after each treatment, after which the experimental and control families were treated twice with bipin (12.5 e.c. of amitraz) according to the instructions for using the drug. The results were analyzed using the ANOVA statprogram. It was found that the treatment reduced the number of varroa mites by 89.5±0.8 % (90.7- 88.6 %, apiary 1) and 90.8±2.3 (94.4-88.3 %, apiary 2), respectively. In the control groups (apiary 1), mites mortality during the observation period was 10.0±1.6 % and 10.7±1.10 % (apiary 2). During the experiments, the death of the queens and bees was not observed.