But the emerged bee mites on the bees will be there for 5 or more days, so they get hit with the next treatment (early in the am with all the bees in the hive) and start all over again. Then you have the question of how many get into cells after 5 days but before the seventh? Not all the mites leave the bees after 5 days. So you would have a small mite drop (only emerging mites not on bees if the residual OA does kill them) until you treat again.But the mites that leave after only 5 days have to crawl on the wax to find a larva at the right stage. More OA contact.So the issue would be -how many mites make it to a cell between the fifth and seventh day? My guess is not many since it is at the beginning of the period when they move to the cells (5-11 days). So there may be a higher survival rate for the mites (but my guess is not very high) treated at seven day intervals compared to 5 day. 



Bill, Agreeing with that thought process,  I suspect the issue is the OA itself.  Given the elevated temp and humidity (more than temp) of the broodnest,  I would strongly suspect that the OA is no longer  viable after 2/3 days   Not sure how to test that,  but I would say its degraded very quickly when exposed and spread out that thin?   

I suspect maybe the glycerin helps slow that degrading vs sublimation where we spread it real thinly.


Charles

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