Which of the following is a common disease that affects honeybee colonies?

Varroa destructor is indeed a significant threat to honeybee colonies and is often considered one of the most detrimental pests affecting them. This parasitic mite latches onto adult bees and larvae, feeding on their bodily fluids and weakening the bees. Its impact on bee health extends beyond malnutrition; it also serves as a vector for various viruses, exacerbating challenges within the colony. The presence of Varroa destructor can lead to increased bee mortality rates, reduced reproduction, and overall colony collapse if not managed effectively.

Honeybee management programs focus on strategies to control and reduce Varroa levels, highlighting its critical status as a pest in beekeeping. While other options listed are also relevant to bee health, Varroa destructor's role as a parasite and its effects on the hive make it a central concern for beekeepers. Understanding the vital role and management of this pest is essential for maintaining healthy bee populations.