I have 6 hives trying to swarm. Saturday I cut dozens of swarm cells out of three of them. I don't want splits, and don't trust the queens I have on hand in nus anyway.
A beekeeper I know with a few years of experience running. 100+ hives suggested split supering; basically putting a medium between the 2 brood boxes. Says it's the main method he uses when hives want to swarm. Seems counter intuitive, because I thought that spreading out a brood nest that much was a great way to get bees to make queen cells. Has anyone used this method successfully to prevent swarms?