Parasitic Varroa mites are causing widespread honeybee colony collapses across North America and Australia by transmitting deadly viruses to bees [1, 2, 3].
These losses threaten global food security because honeybees are essential for pollinating the crops that sustain human populations. The collapse of these colonies could lead to significant agricultural failures if new treatments are not implemented.
In Canada, nearly 50% of honeybee colonies did not survive the winter of 2024-2025 [2]. Other reports indicate that Varroa-related losses account for 60% of the colonies needed to pollinate food crops [3]. In the U.S., approximately 1.1 million honeybee colonies have been lost [5].
The parasite is also expanding its reach in Australia. On Sept. 4, 2025, officials detected Varroa mites in the Riverland region of South Australia, marking the fifth jurisdiction in the country to report the pest [4].
Researchers are fighting back with new detection and breeding strategies. Dr. Sammy Ramsey is studying the mites using a non-lethal powdered-sugar collection method to monitor infestations without killing the bees [1].
“We’re hopeful that by studying these mites we can eventually eliminate the threat they pose to honey bees,” Ramsey said [1].
Other efforts focus on genetics. In Southern California, researchers are conducting field trials with hybrid bees. A study released on April 20, 2026, suggests these bees may be more durable [6].
“The hybrid bees in Southern California are showing remarkable resilience against Varroa-induced losses,” a lead researcher said [6].
Despite these breakthroughs, the scale of the infestation remains a concern for experts. One expert described the current situation as “pretty disturbing” [2].
““We’re hopeful that by studying these mites we can eventually eliminate the threat they pose to honey bees.””
The global spread of Varroa mites represents a systemic risk to agricultural stability. While traditional chemical treatments often fail or harm the bees, the shift toward non-lethal monitoring and genetic hybridization suggests a move toward sustainable, biological resilience. The detection of the mite in South Australia indicates that few regions are safe, making international research collaboration critical to preventing a total pollination collapse.
