Among the ills that await center agriculture, varroa — it is far not on last place. This is called invasive disease mite that in all stages of development a parasite on the body of worker bees, Queens and drones, and brood.
To fight against the insidious varroa now used as a physical (e.g., 15-minute heating bees in a heat chamber until t = 46 — 48°C) and chemical means (for example, strips “Apistan” put on 10 to 20 days in the hive). Past in rural provinces often substituted with “old-fashioned” treatment of part of the oxalic acid: and cheaply and effectively.