Protection of bees from varroatosis. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Home, household, hobby
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Huge damage is caused to beekeeping by the so-called varroatosis - the defeat of bees by a small tick. However, effective methods of dealing with it have not yet been developed.
Basically, they boil down to the fact that the affected areas are cut out of the frames. Positive results are achieved by treating the hives with varroatin or formic acid. This work is very laborious, and most importantly, the disease is not completely eliminated.
G. U. Laptev, an amateur beekeeper from Alma-Ata, proposed a method for combating varroatosis. Its essence is that at a temperature of + 40 °, the tick dies, and the bees remain alive. Given this circumstance, a temperature of + 42 ° is created in a closed capacious wooden box and then placed in it for 3-20 minutes. (depending on the intensity of the lesion) two hives with open lids, and varroatia is injected through a fan installed in the lid of the box. The result is amazing: at the bottom of the hive, a layer of spilled mites is formed.
Schematic diagram of the device for processing hives - in Figure 10.
(click to enlarge)
Inside the box, at a certain distance from the screeds, electric heaters of heating elements (R2, R3, R5, R6) are fixed with the help of tin brackets - two at the top and at the bottom. When the air warms up to 40 °, the contact thermometer B1 closes the base circuit of the transistor V9. The K1 MKU-18 relay is activated and de-energizes the heaters with its switching system. At the same time, if the S3 toggle switch is closed, the M1 fan starts to work, "blowing" medicine into the hive. Using the S4 button, the fan is turned on manually for short periods of time, and with the S2 toggle switch, some of the heating elements are transferred to the "duty" heating of the box.
In the power supply of the device, a vertical scan output transformer (TVK) from old TVs or any step-down transformer for a voltage of 12 V is used. The winding of the MKU-48 relay should be rewound with a PEV 0,18 wire until the frame is filled.
Fixed resistors - MLT-0,5 or VS-0,5, R9 - variable resistor type SP, C1 - electrolytic capacitor K50-3 or K 50-6. Toggle switches S1-S3-TV1-1, button - bell. Heater heaters are designed for a power of 500 W - 1 kW each. Signal neon lamps V1-V4 are placed on a common control panel.
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