Oxalic Acid Dihydrate 99.6% is a white crystalline powder used for the control of Varroa mites in honey bee colonies. It can be sublimated into the hive or dissolved in sugar syrup and dribbled or sprayed between the frames.
Apply in late fall to early spring when monitoring indicates treatment is necessary.
Do not use it when brood is present.
140 g makes 4 Litres of sugar solution which treats approximately 80 colonies (50 ml/colony).