Pick up Only
Oxalic Acid Dihydrate Crystals, 99.6% purity. Can be applied either as a dribble treatment with a syringe when mixed with sugar syrup, or used dry with an oxalic acid vapourizer.
Oxalic is an organic treatment option with high efficacy against varroa mites. For best results apply late in the year when colonies do not have brood present (November)