Formic Acid mixture

Formic acid mixed w/ honey bee heathy

Fume board goes above brood nest. Heat from brood nest will make the formic acid mixture evaportate. Formic acid is heavier than air so it drops down to the brood nest and kills the mites even in capped brood.

John made this fume board and was nice enough to sell it to me so I didn't have to make my own.