I suspect some of my hives are infected with Nosema apis, and I might want to try the "drench" method for applying Fumagillin-B. Anyone here have experience with that?
More specifically, does anyone have information about dosing amount with this method? I believe Randy Oliver mentioned using 30mg per 1 cup of syrup on each 10 frame colony in his trial. I can't measure 30 mg by weight, and have no idea what that would be measured by volume of the powder. I would likely be looking at tiny amounts, as I'm looking to treat nucs that are due to accept queens that I do not want to lose.
I'm also mid-honey flow, so do you think this method is OK while honey supers are on full size hives? Just looking for opinions here. The thinking out there is that with spraying the bees directly on the frames, they consume most or all of the medication and don't necessarily store it. It is also thought to be a more effective and economical method (if not in labor) application because you can use a lower amount of the medication. Hmm...?