This has probably been discussed, but I was listening to a podcast this morning of Dr. Samuel Ramsey. He described forced brood breaks as risky. He stated that forcing varroa out of their natural reproductive cycles and moving them all, virtually at once, to host on the bees within a colony could cause a rapid spread of viruses within your colony and spike virulence.
I suppose that makes sense, but that is a break from some conventional wisdom -- as well as contrary to my practice of creating artificial brood breaks. Guess I will be thinking hard about this one over the winter. Any thoughts out there?