Hi Guys, I've used oxalic acid as a mite control when experimenting with the effects cell size. It's effective, cheap, easy to apply, and won't contaiminate the beehive. It's the most benign mite treatment I've tried on the bees and I've tried them all except checkmite. Just be safe with it. After all, it is a treatment and it does KILL mites. Use it wrong and it can probably harm something/someone else as well. Gone are days when the only skills needed for treating bees were good eye-hand coordination, a strong back, and a love of repeatitive motion. :>) Regards Dennis -- Visit www.honeybeeworld.com/bee-l for rules, FAQ and other info ---