Re: late season swarm prevention
I think some hives are genetically predisposed to swarming in the fall. A hive that swarmed last year around October 1st just swarmed on me today. It was the only hive out of 17 that had queen cells in it and there was plenty of open real estate so crowding was not the issue. Interestingly, while there were no eggs in the hive, the youngest brood was just hatched larvae and one of the queen cells I found was already opened.
BTW, I captured the swarm and have the queen in a clip. That nuc will get plenty of resources to help them make it through winter including brood from some of the other hives.
Thankfully, the bees are smarter than I am. They are doing well, in spite of my efforts to help them.