>An approach I'm taking this year to swarm management is to go in remove the old queen and place her in a castle. My thinking is at the least it will be a delay to swarming. I plan to keep the population up by adding brood frames from the castles.
It can work really well two weeks before the flow, but that also may be too late if they are too far ahead of schedule... If you remove the queen too early it will cost you honey. Too late it will cost you swarms. It's all in the timing.