It seems that most of the folks that post to this forum are what I'd term "hobby" or "serious" hobby beekeepers. Perhaps 100 hives or less and something that can be managed in a weekend.
It would be interesting to hear from a big commercial outfit that keeps hundreds of hives and how they manage them for mites. Do they employ a sticky board on every hive and count the mite drop from each? Do they use the FGMO treatment on every hive every week?
What differences are there in how a large commercial beekeeper operates and how a hobby beekeeper operates?
Do commercial outfits suffer a higher percentage rate of winter loss due to mites?