Beekeepers have been using Oxalic Acid mixed with Glycerine all over the world for many years. They have found it extremely beneficial to the health of the colony. It can be used at any time of the year and the secret to its effectiveness is to maintain regular treatments. Colonies with high mite loadings have a lot of bees with stab wounds and suffering from virus infections. When Oxalic acid treatments are applied, many of these bees will go outside and die. This has even been observed during the night after a treatment on the previous day. If most of the bees are healthy, virtually zero adult bee mortality is observed.