Fuente: WIPO "apiculture" A method and a device for ridding a bee-hive of Varroasis by heating air drawn into the hive from outside heat. The treatment may be carried out using a standard heater fan coupled to the lower entrance of the hive. The inside of the hive is thus heated to about 38 °C for about 2 minutes. The treatment may be repeated about five times on following days. comprising at least one honeycomb, a housing and at least one. A polyfunctional device includes a unit stacked on top of the upper or only brood chamber includes an upper vent for enabling convection hot currents to pass through the hive. The polyfunctional device further includes means enabling other typical beekeeper functions to be performed without extra tools, such as feeding and incentivating the bees, removing honey from the hive and breeding queen-bees on a small scale.