Aleksander,
Logic states that your suggested experiment would be better conducted in
the locations where V.d. has been present over a relatively extended
period and where acaricide resistance is highly pronounced.
It would be in these regions that bees would (could) have developed a
higher resistance against the presence of mites - what ever the
technique! - if it has or is occurring.
How about contacting IBRA in Cardiff. UK.
They are putting on a conference on Bees in Temperate regions of the
World in the relatively near future.
Maybe they can get somebody on to the hypothesis.
Peter
Inure
France