Dany's BienenWohl
Behandlungsmittel
Dany's BienenWohl is an approved oxalic-acid-based veterinary medicinal product.
Dany's BienenWohl is an approved oxalic-acid-based veterinary medicinal product. It is supplied as a powder and a solution, from which a dispersion for use in the hive is prepared, with an oxalic acid content of about 39 milligrams per milliliter. A product with the same active substance is sold under the name Oxybee. This point matters because forums and catalogs sometimes claim it is merely a care product. That is not correct; it is a medicinal product and subject to the corresponding rules, including the documentation requirement in the Colony Register.
Compared with the classic sugar-containing trickle solution, the dispersion contains additional ingredients: citric acid monohydrate as a stabilizer, glycerol to adjust viscosity and increase efficacy, and anise oil and eucalyptus oil for flavoring. These additives do not change the mode of action but the handling.
The dispersion is applied by trickling onto the bees in the occupied comb spaces, with 5 to 6 milliliters per bee-occupied comb space and up to a maximum of 54 milliliters per colony. If the bees occupy more comb spaces, the amount per space is reduced accordingly to stay within the maximum dose. The dispersion is applied warmed to 30 to 35 °C, and the outdoor temperature should be at least 3 °C. A broodless colony is a precondition, since oxalic acid acts as a contact agent and does not reach mites in the capped brood. The application timing is thus the final mite treatment in late autumn or winter.
A practical advantage lies in the shelf life of the prepared dispersion. While sugar-containing oxalic acid solutions must be used up immediately after preparation, because the sugar forms hydroxymethylfurfural, which is toxic to bees and larvae, the finished dispersion remains usable for considerably longer. This makes treating larger numbers of colonies over several sessions easier.
The withdrawal period for honey is zero days, but the product must not be applied during the nectar flow. Since oxalic acid is water-soluble, no accumulation occurs in the wax. As with all oxalic acid applications: treat only once, no higher doses, no repeated applications, because the bees tolerate this poorly. When handling it, acid-resistant gloves and safety goggles should be worn; oxalic acid is caustic and hazardous to health.
Quellen (4)
- Europäische Union, Community Register: Dany's BienenWohl, Anhang I bis III (deutsche Fassung)
- Europäische Arzneimittel-Agentur: Dany's BienenWohl, Zulassungsunterlagen
- Emmerich, I.: Zugelassene Arzneimittel für Honigbienen in Deutschland, Berliner und Münchener Tierärztliche Wochenschrift 2018
- LLH Bieneninstitut Kirchhain: Infoblatt Varroazide