Formic acid for the treatment of bees with varroatosis is used at ambient temperatures from 14°C to 25°C in the spring (after a mass flight of bees) and in the summer-autumn period (after pumping honey).
Formic acid is placed in bee colonies in spring twice with an interval of 12 days for a period of 3-5 days, and in autumn once for 3-5 days. During the treatment of bee colonies with formic acid, the upper flaps in the hives should be open.
Formic acid is used in plastic bags with a size of 20 X 30 cm. in flat bottles with a neck diameter of about 2 cm, polyethylene household lids with a diameter of 9 cm, or with the help of special acid dispensers (vaporizers).
2-3 cardboard plates of 15 X 25 cm in size, 3-5 mm thick are put into the bags and 30-50 ml of formic acid is poured into them. After the plates have absorbed all the acid, the bag is closed by bending its upper edge twice. Before use, 1-3 holes are made in packages (depending on the strength of the family) with a diameter of 1.5 cm, then they are placed on top of the honeycomb frames with holes down and closer to the back wall of the hive. Two wooden slats are placed under the package.
30-50 ml of formic acid is poured into the vials, twisted gauze wicks are inserted into them with a thickness corresponding to the diameter of the neck. The length of the wick should be 3-5 cm greater than the height of the bottle. The wick is impregnated with acid by dipping it with tweezers into a bottle. One end of the wick is removed outside and unwound over the neck. The bottle is suspended from the upper bar of the empty frame and placed on the side of the nest.
An empty polyethylene household lid is placed in a beehive on a honeycomb frame, 30 - 50 ml of formic acid is poured into it and covered with cardboard measuring 10 X 10 cm.
30-50 formic acid is poured into the formic acid dispenser and placed on the frame, with holes for evaporation down. Two wooden slats are placed under the dispenser.
Processing of bee colonies is carried out as follows. The lid, the insulation cushion, the canvas are removed from the hive and the bees are fumigated with smoke from the smoker. A bag filled with formic acid, a bottle, a lid or a dispenser is placed in the hive, then a canvas is placed on the honeycomb frames, the hive is insulated and closed.
Honey obtained from bee colonies that have been processed is used for food without restrictions.
1. When working with formic acid, precautions must be taken: persons who have passed special instruction are allowed to work; bees are treated in dressing gowns, rubberized aprons, rubber gloves, glasses and respirators; packaging is carried out in a fume hood or outdoors; avoid getting the drug on the skin, clothes and eyes; after work workwear should be removed, hands and face thoroughly washed with water.
2. If formic acid gets on the skin, it is immediately washed off with a large amount of cold water, and then with soap and water.