The provided text discusses the critical role of Varroa destructor mites in the decline of honey bee health and colony survival. These parasites damage bees by feeding on their haemolymph and acting as a primary vector for viruses like Deformed Wing Virus and Israeli Acute Paralysis Virus. Research from the University of Guelph demonstrates that colonies with lower mite population growth exhibit significantly reduced viral loads in both adults and brood. Because there are no direct cures for bee viruses, the authors emphasize that controlling mite levels is the only effective way to manage these infections. Beekeepers are encouraged to utilize effective miticides or select for genetically resistant bee stocks to mitigate the impact of these destructive pests.

