Fuente: WIPO "varroa" A beehive having a bottom board for separating mites from bees working in the beehive. A permanently installed screen in the bottom board separates mites from the bees, and a sticky sub-board below the screen traps the mites to prevent re-infestation. Notched members around the perimeter of the sticky sub-board prevent bees from climbing up into the beehive and prevent re-attachment. The sticky sub-board is accessible from the rear of the beehive so that the entry and exit of the bees into and out of the beehive are not disturbed.