Re: Another varroa question
I'll answer from my own experience which is that I often see differences between colonies that are just feet apart. There are some obvious reasons such as how long the colony has been established and the amount of brood in one colony compared to another. An argument could be made relative to hygienic genes, etc. However, I've seen two packages that were hived the same time having significantly different mite loads a couple of months later. Amount of brood, etc. seemed roughly the same. I always remind myself that backyard science is not perfect so the results may have a bit to do with testing and not necessarily the conditions of the colony. Nevertheless, I do my best and manage them accordingly. In my opinion, you can't use one hive to model your treatments across all your colonies. Not sure about the tracheal mite question.
"My wife always wanted girls. Just not thousands and thousands of them......"