Trevor asked about the build up of VSH hives.  I wondered the same thing.  But the whole dynamics of Varroa changes with these bees (and I'm speaking as a mathematician now, not from personal experience).  VSH are by nature highly hygienic.  It is their nature to remove  Varroa infested brood.  Constantly.  Therefore the Varroa populations never reach very high levels.  The more the brood remove the fewer Varroa mite remain, so the fewer subsequent infested brood have to be removed.  The bee population will pick up.

Aaron Morris - thinking mathematics is the only true science.


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