Yes, but I asked Dr. Guzman (who was leading the study) if the same numbers (as dry OA powder) would apply to OA vaporization and he said -yes... He was presenting the findings of the study at our bee club meeting last week. Pressed again, he confirmed that there is no such thing as harmless treatment. Don't shoot the messenger...Dekster, you may want to read the paper you linked again. OA was only tested as a dust mixed with powdered sugar and as a liquid mixed with glycerin. It was the glycerin/shop towel (ala Randy Oliver) application that had the highest bee mortality in this study. OA vapor was not tested. There are no reports that I know of, among those that use OAV, of any bee mortality, including brood.
They mixed OA in feed, and put 6 grams of oa in to each single brood chamber and suggest the bee mortality is the same as vaping 1 gram?Treatment 1, OA dust, was prepared as previously described by
Emsen et al. (2007). Finely powdered OA dehydrate (Sigma–Aldrich,
St. Louis, MO) was mixed with confectionary sugar at a rate of
0.2 g of OA per g of total powder. In total, 30 g of formulation was
applied to each colony on a piece of newspaper (25 × 10 cm), which
was placed on top of the frames of the brood chamber.