Hi Guys, >The results showed the varroa, not just on the nurse bees as in a sugar roll but rather on the whole hive. That's one of the reasons I dabbled in powdered sugar blasting. See http://bwrangler.madpage.com/bee/gbla.htm I initially used it to get a whole hive sample of varroa mite infestation. I know blasting can be quite effect if used properly. But it's alot of work. It would be interesting to do a 'sugar dump' between the frames and then take a hive apart and observe sugar's distribution. Those little electrostatically charged bees might be more coated that I would think. And dumping takes much less time/energy than blasting although it takes more sugar. As a curious note, my first encounter with varroa involved powdered sugar. Back in the late 80's and early 90's, before any beekeeper I knew had seen a varroa, several of my hives developed PMS and got dusted with TM thinking it was a brood disease. The 'disease' persisted so they were isolated and treated again. The 'disease' would abate somewhat but would soon return. So I dumped a lot of TM down between the frames and the hives survived until the next season when I saw my first varroa mites in them! I now know it was the powdered sugar knocking down the mites that kept those hives alive. Regards Dennis -- Visit www.honeybeeworld.com/bee-l for rules, FAQ and other info ---