In cases where bees are not given mite treatments, and those who cannot survive are allowed to die, the approach is sometimes called "The Bond Method" or "Live and Let Die".

An argument against this approach suggests that you reduce the gene pool by losing bees that might have other valuable breeding traits.

But given that users of the method are so much in the minority, wouldn't it stand to reason that any of the genetic traits of a given be that are not maintained in the treatment free yards would be carried on in the treated yards in the same area?