>Others have argued for a different approach which traps varroa in drone combs that are then relocated to separate receiving colonies. >
An excellent idea, if the drones are healthy after Varroa exposure. Most local beekeepers are highly urban, many already have the bylaw permitted two hives in their yard. Setting up another hive whose job it is to emerge drone frames and control for the resulting Varroa would be more than most would be willing or able to do. But it would be a great club project, to have a designated hive available for this purpose.
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