Re: Is fall treatment for varroa obligatory?
David, I do not understand your reluctance to continue treating NOW while the bees are raising the bees that will raise the winter bees. You need to be mite free at this time to have the strong healthy bees needed to make it through winter. Waiting to kill mites in Oct., in a hive full of weak bees, is no plan for success. I do three rounds of treatments through the fall and two single treatments while broodless, one on Thanksgiving, the other on Christmas. Last year I had 0 winter losses and my March apiary inspection showed 0 mites at that time. Other beeks that follow a similar regimen have similar results. Those that don't are the ones that complain that OAV is not effective.
Thankfully, the bees are smarter than I am. They are doing well, in spite of my efforts to help them.