Re: Mite count went up -- treat?
Actually according to the writing of Randy. You need to take a longer sampling during bloodless periods to get an accurate count if you do not use an accelerant to cause mites to drop. This actually indicates the natural mite drop falls during broodless periods. At one point he refers to a recommendation of a 3 week sample. HE also addresses the impracticality of that for the average beekeeper.
Originally Posted by Ian
Part of the reason I see for this is that during brood rearing periods 2/3 of the mite population is assumed to be in the comb with brood. At one point Randy mentions that you need to multiply the mites count by 30 or 40 to have an idea of just how many mites are in a hive. And that is during brood rearing periods when 2/3 of the mites cannot drop.
During bloodless periods the mite count will go up. but each mite represents a much lower number of mites in the hive. Because 100% of the mites are now on adult bees and subject to falling.
So if you must treat threshold is 50 mites drop in 24 hours during brood rearing. then it would be the same as if you allowed 150 mites to drop in 24 hours in none brood rearing periods.
In the end Randy suggests that some of the roll or shake methods of testing are more accurate during none brood periods.
This is copied from the writing.
§ Use natural mite drop on stickies when there’s brood emerging
§ Use jar samples or accelerated stickies when colonies are broodless
Significant Minority vs Insignificant Majority, 20% of causes produce 80% of the effects.