Re: Oxalic acid vaporizer results....hmmmm
Yes I was interested but there is no possibility to know if the OA did anything, or not. The only assumption seems to be that the 5.4 hives should have more mites than the 4.9. But not everybody finds that and in fact some studies have found more mites in 4.9 than in 5.4. But that's an aside, the main problem being that with no before tests, a judgement cannot be made.
To your other question, yes. When I have used OA vapour it's killed lots of mites. We have no broodless period here though so several repeat applications are needed, which does hike up the labour involved.
44 years, been commercial, outfits up to 4000 hives, now 120 hives and 200 nucs as a hobby, selling bees. T (mostly).