Acaricidal activity of various preparative forms of oxalic acid in varroatosis in apies of the Tyumen region

The purpose of research is to study the acaricidal activity of various preparative forms of oxalic acid in apiaries in the Tyumen Region. In the first experiment (2021), to treat 18 sterile colonies, which were divided into 5 experimental and 1 control groups of 3 bee families in each, cardboard plates measuring3.9 × 15.8 × 0.1 cm were used, containing 1.5 and 2.2 g of acid, paper napkins of two types, including1.5 and 2.0 g of active substance and fabric napkins (35.0 × 40.0 × 0.1 cm), containing 13.6 g of active substance. The plates were evenly suspended in the hives between the frames in the amount of 5 samples per family, the napkins were placed on the upper bars of the frames for 10 days. In the second experiment in 2022, 9 bee colonies with brood were selected and divided into experimental (5 families) and control (4 families) groups. In the experiment, plates measuring 3.0 × 31.0 × 0.1 cm, containing 2 g of the drug, were placed in hives between frames in the amount of 6 samples per family for a period of 30 days. In both cases, control families were not treated. In the first experiment, treatment of sterile bee colonies with plates reduced the number of varroa mites by 96.5 ± 3.0 and 88.3 ± 4.5 %, respectively. In families treated with wipes, no tick deaths were observed. In the second experiment, the efficiency of processing bee colonies with brood was 75.6 ± 7.8.