A beekeping friend of mine, who earlier lived in Kasachstan has told
me from the system you mentioned. There he had 25 hives wich made
him a sideliner. When varroa came in their area, they tried many
differnt methods. The best suited method for their rural area seemed
to be the heat treatment. On a not to cold winterday the bees are
dumped in meshed drum which is munted over a heater. They heat and
carefully measure the temperature and put a white sheet of paper
under the drum. The drum is rotated to achieve the same temperature
for each bee. When they see varroas fall on the paper, they do not
more increase the heat. The lethal themerature for bees is only 3 or
4 C higher than the lethal temperature for varroa. The method is
labor intensive, but just one treatment per year is sufficient and no
chemicals are brought into the hive.
greetings  Wolfgang
Wolfgang Poehlmann, Hobby Beekeeper in South Germany
Email: [log in to unmask]
homepage: http://home.t-online.de/home/wolfgang.poehlmann/imkerei.htm