Ive tried briefly to find some basic information on asian honey bee resistance to varroa. Basically what I read was exactly MN hygenic behavior, the asian bees adapted to cleaning eachother and dragging out mites. It seems to me that since varroa came from the asian honey bee that those genetics have had a chance to adapt/evolve for thousands? of years. Perhaps getting some asian honey bee genetics in the mix or straight asian might be a step forward in the TF world?