This isn't about two queen systems. This is about 3 and 4 queen systems. Has anyone heard about this being done in China? Supposedly they remove a mandible from each queen and then they can't fight. Sounds like a joke to me. Doesn't seem feasible or practical.
Seems ulikely to work all the way around. First, the laying queens aren't after each other in the first place. Second, QMP comes from mandibles... duh... so without QMP they will build supersedure cells, as already pointed out...
The two easiest ways I've found to setup a two queen hive are to put an excluder in the middle of the brood nest and usually the queenless half will raise a new queen, or put a queen cell in a queenright hive and a good proportion of the time the queen will emerge and they both will be laying two weeks later...
The idea might work in China. They seem to be the largest producer of royal jelly. The loss of QMP and resulting supercedure cells would provide plenty of rj to harvest. Harvest the rj, cut out the cells and the cycle would continue.
Soooo...there may be a shred of truth in the story. Just a guess on my part.
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