Grant writes:

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.

My experience follows the first point. But how do you get to the second point? 

If the bees die the first year, there are no bees the second and third year. 

PLB

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