The only thing that matters in this, since oxalic acid sublimation only
kills phoretic mites, is maximizing the percentage of phoretic mites when
applying the treatment.

It seems to me that this would be after the first round of OA is no longer
killing mites and enough time has passed that the maximum amount of
phoretic mites are present.

Asuming a constant rate of emerging and capping, aximum mites will be
present any time after the average reinfestion period, which is 5 days plus
the number of days that OA is effective for in the hive (3?).

Using a second treatment anytime after 8 days should have near identical
results, no?

In reality though, I find the optimal interval is 365 days when there are
minimal capped brood present.

David Baker
To Bee or Not To Bee
Denver, CO USA

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