> I ask because my observation is that once treated bees are denied 
treatments it appears that the mites becomes hyper virulent Even a June 1st 
nuc made up from a hive that is treated may not make it to the next spring 
without treating. After a few years without treatment something changes 
where the mites seem less virulent. Not that the mites aren't still an 
issue.

That is interesting.  I presume these are observations you made first hand, 
and not just reports on a more or less anonymous Internet boards?  We've all 
heard those stories, and when the full details are known there tends to be 
more to these tales than what is readily revealed.

This claim runs counter to what many of us have observed and experienced, 
but we would like to believe it.  We'd love to hear the details if you have 
the time to explain and give instances. 

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