A useful video from the folks at Brushy Mountain Bee Farm:
Published on Mar 18, 2016
With its high efficacy and low risk of contamination, many beekeepers are looking to use Oxalic Acid this year. We have brought in an expert panelist, Marion Ellis Ph.D, to better explain the use of Oxalic Acid. As an entomologist, his research into the effects of Varroa and other parasites on honey bee colonies have given beekeepers insight into better hive management.
"I particularly like this method because, as you can see, there are mites lying on their backs kicking their legs and really suffering, and it really makes me feel good to see that."
At 10 minutes, 30 seconds in http://tinyurl.com/joae7tx