Free tools
Mite count calculator
Turn an alcohol wash or sugar roll count into mites per 100 bees and see whether the colony is over the treatment threshold.
Half a cup is about 300
About the threshold
3 mites per 100 bees is the common action point for most of the season. In spring, with brood building and the population still small, many beekeepers act at 2. Take bees from a brood frame, not the honey supers: nurse bees carry the most mites.
Hive Complete
Chart every mite count, hive by hive, all season
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