Tell me, when Calderone tried to raise mites that preferred worker brood, why did he fail?
There is always more varroa mites in worker brood in a colony than there is in drone brood, so by letting those emerge are we selecting for worker brood preference? The thought that by removing 1 to 3 cycles of drone brood in a colony is going to change mite reproduction is silly.
The foundress mite rode the nurse bee until she smelled larvae of the right age for her to enter the cell, then she dropped off. If she smells much larvae of the proper age, and she detects that much of it is drone larvae, then she is more selective about which cell she enters because she is not under pressure to find a cell to reproduce in.
Removing worker brood would be as effective as removing drone brood, except we know that removing drone brood will slow the mite's growth rate faster than removing worker brood (2.6 versus 1.3). We also, like the colony, consider drones expendable.
Here, using drone comb removal for the first 2 brood cycles, will usually keep varroa levels below the economic threshold until August, this means 1 less treatment.