Oh, I should note, I started raising bee as a kid in the 1960s. No varroa, no small hive beetle, just wax moths and little worries with bees. Now, these days, the small hive beetle is as much a threat as varroa. I use Freeman bottom boards (beetle traps) baited with pollen patty surrounded with diatomaceous earth to control the beetles. Understand, in summer my beetle traps can average up to 20 beetles a night migrating into each hive. North Arkansas was plagued with beetles in 2016. Many hives were lost to beetles in this area. I was fortunate, my traps kept beetles at a manageable level.
I hear people say with a cavalier attitude, a strong hive will manage the beetles, no problem,,,,,, well 600 beetles a month is a tuff one to overcome for my hives and I consider my hives to be strong.