Re: Treatment Free Study in Northeast Pennsylvania
The best information is that varroa crossed over from Apis Cerana a bit over 100 years ago. Apis Mellifera was brought into the Primorski region between 1900 and 1930 in an attempt to improve honey production. Italian and Carniolan bees were the most commonly imported. Russian bees as we have them today are an amalgam of all the genetics that were imported into that region. Because they were exposed to varroa so long ago, the remaining bees adapted to varroa of necessity. Sans treatment, the genetic resistance is fairly stable. Weaknesses of the Russian bees include excessive swarming, somewhat bad temper, smaller overall average colony size at peak which significantly affects honey production, and a brood cycle that emphasizes spring buildup. Advantages include very good wintering on average, good mite tolerance, and good colony protection.
it only took native bees in china 10,000 years to adapt to varroa mites.
If you are commenting about Apis Cerana, then I agree that exposure to Varroa Destructor and Varroa Jacobsonii is so far back in pre-history that it cannot be defined.
DarJones - 45 years, 10 colonies (max 40), sideliner, treatment free since 2005, 11 frame broodnest, small cell