Are queens attracted to queen pheromone?
If that is the case, I think the bigger gain would be to use this method to lure queens out of swarms that have taken up residence in walls of buildings.
Seems too good to be true.
I think they are attracted, as another queen would be an rival. Ed Weiss used to crush queen cells, and move the finger with the crushed bee over the frames, and when the queen was below whe would pipe. Have no idea though if such a trap would work though.