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So even though it is a little late, I have showed Joseph how to perform a sugar shake. This is a way to non-destructively (mostly) test your bee colony for the presence of mites. You can get pretty clear, short directions from Betterbee, but the upshot is that you cover a couple of hundred bees with powdered sugar, shake 'em until the varroa mites fall off, then count the mites. If you get a lot of mites, you have to treat, if you don't, you get to worry about whether you should treat.
Except for Joseph. We shook and shook, not one mite! So we pulled his bottom board. It had been in for WEEKS: maybe 2 mites.
Joseph does not have to treat for mites. Next year, however, Joseph does have to give me a daughter of the most hygienic queen I have ever seen.