Mite treatments will be the hot topic for all beekeepers very soon. Look at the graph above about the bee and mite population and the timeline. The Varroa population lags the bee population, up until early September. Then the mite population keeps increasing as the bee population goes down. This high infestation of mites damages the bees physically and also exposing honeybees to viruses. This high infestation of mites is what kills honeybee colonies. Beekeepers need to stop this rising mite population during the month of August before the Varroa population explodes. Looking at the graph one can see there is a sharp rise in the month of August in the mite population. Treating colonies in September in many cases is too late. The bees may be so damaged by the rising mite population that they cannot recover.
Read the full article at: Mite Treatments — What Should I Be Doing With My Bees This Month?