I see this topic come up frequently, and have seen all the common attempts to remedy it, often unsuccessfully, but...
If we go queenless, we add eggs and brood continually to keep the workers from laying. The nurses will turn some cells into queen cells and a few weeks later all is right in the world. Just don?t forget to keep adding brood until a mated queen returns and starts laying. We are introducing eggs, brood and brood pheromone.
If we get laying workers, the brood pheromone makes the hive think there is a queen and they kill any queen cells we introduce.
Why does us adding day old eggs and brood not make the bees kill the queen cells in the queenless hive?
What would happen if you had laying workers and you removed all the brood frames and replaced them with new foundation, leaving only a couple frames of stores. Then, every other day or so, go through and replace the frames that are nearing completion with new foundation again. A couple days into this, ( once the pheromones are gone ) cut and paste a small patch of eggs from a queen right hive into one of the store frames and see if they draw a queen cell. Just keep pulling drawn comb out and replacing it with foundation until the queen emerges, then let them complete the comb drawing while she goes on a mating flight.
Essentially, not giving the workers anywhere to lay until a queen is returned.
Possibly you could expedite this and introduce a queen after a week and put back some of the drawn comb at the same time.
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