pete's not making it complicated jen, no need to sigh and roll your eyes..........pete is probably right, and it is not a magic bullet. nothing is. that's a fact.
"Jen, I would not bee so quick to dismiss Oxalic acid vapour as harmless to the bees. It is in fact fairly toxic at the concentrations required to kill mites. Some eggs and open brood may be killed and the adult bees may also suffer minor tissue damage. Of all the organic acids, Oxalic has the largest gap in toxicity to the mites versus the bees, but it is toxic to both. I would also be willing to bet that mites will become resistant to OA treatments over time. Every time you threat it's the mites with the thickest carapace that will survive. Give it a decade or two and you'll see. Don't get me wrong, I think that oxalic is the best treatment available right now, but it's not a magic bullet."