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Oxalic acid is a very effective treatment against Varroa mites when used appropriately. Api-Bioxal is approved by the FDA for use in honeybee hives - most other forms of oxalic acid would be considered "off label" use and incompatible with best practices. We recommend using a Heilyeser vaporizer and providing oxalic acid treatments when the hive is broodless (October, and mid-winter in the northeast) or when outdoor temperatures are inappropriate for other treatments. When using OA vapor during active brood-rearing it is best to give the hive five treatments, five days apart. Use at a rate of 1 gram per deep hive body. Available in a 35 gram bag or 350g
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🇺🇸 Ship from USA · On Agora since 2025
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