Control of Varroa is an ongoing battle. The timing and choice of treatments are critical in keeping bees healthy. However, most treatments do not effectively kill Varroa mites while they are under capped brood cells. This means that it requires multiple treatments, which can be labor intensive, or leaving a slow releasing chemical in the hive for at least 42 days to gain effective mite control while there is capped brood present. The most effective time to treat for Varroa mites is when there is no brood and the mites are exposed while on the adult bees. There are certain times of year when bees can be naturally broodless and beekeepers can take advantage of these times to apply a mite treatment. In addition, beekeepers with small enough number of colonies can create a period of broodlessness after the honey flow by caging the queen. The use of queen caging a part of an overall mite control strategy will be presented.
Presenter: Dr. Brandon Hopkins, Washington State University
Brandon Hopkins is an associate research professor at Washington State University. He helps manage about 250 research colonies along with the production of queens. He is interested in research project involving Varroa control, virus control products, queen breeding, reproductive technologies, and indoor wintering.