a Jose Villa snip followed by my comments..
>A longer lasting and more insidious effect comes from a vast majority
of the commercial stock having low resistance to varroa.
A similar problem we face here in Texas is the increased (faddish) interest in beekeeping and the importation of 'gentle'* bees from the east and west coast. As Jose seems to suggest these are typically from highly treated commercial stock. At one time me and my neighbor were the only beekeepers in several counties, we pursued the same non treatment goal and did not have to contend with the dilution of drone stock from external sources. This I suspect has made any long term gains in regards to varroa resistance much more difficult.
*as a general rule this same stock broods up constantly and typically dies out in the late fall.
Gene in Central Texas but not for long...
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