Background info: I'm a TF (since 2005) beekeeper and last spring I raised a few queens (Nicot system) from my best varroa resistant colonies. I used larvae from the queens in only 3 of the most resistant of 13 colonies that came from feral swarms, trap-outs and/or removals. The yield from my 1st ever attempt to raise queens was 7 virgins ready to mate. Also, based on anecdotal evidence and observations (not scientific, mostly natural drop counts) I'm convinced that many of the feral bees in central NC area are resistant to varroa, pms viruses, etc, but lose the resistance over time (probably due to queen replacement) in a managed apiary.
So I wanted to maximize the odds that the resulting virgins would open mate (I have no AI capabilities) with the feral resistant drones. My idea was to prevent the drones from my apiary from flying during the mating period (I know there are other managed hives within a couple of miles, but beyond my control). To do this I used queen excluder over entrances.
Only 4 of the 7 successfully mated and 1 of these 4 simply disappeared about 3 weeks after starting egg-laying. The 3 new queens are currently heading thriving colonies. Based on drop counts, 1 colony is virtually mite-free and 2 colonies have average mite loads. There's no evidence of viruses.
Questions: Would preventing the flying of NON-resistant drones help speed up the creation of a resistant feral population? Is this something we could ask the treatment beekeepers and perhaps the commercial beekeepers to do? Would a coordinated program (involving the release of resistant drones and the confinement of not-resistant drones) implemented nationwide for one are two breeding seasons fix the varroa problem?