Recent testing of an apiary in north east Victoria has confirmed Varroa mites with resistance to pyrethroid miticide treatments.
The likely pathway of the pyrethroid resistant mites into Victoria was in hives moved from interstate last year and subsequently sold to a Victorian beekeeper.
Executive Director Biosecurity Charlotte Austin said the detection of pyrethroid resistance in Victoria highlights the importance of beekeepers maintaining a close watch on miticide treatment results.
“Beekeepers are urged to regularly monitor mite levels in their hives to check that treatments are working, and rotate miticides with different chemical groups as part of best practice management,” Ms Austin said.
“It is important beekeepers remain alert and let us know if their products do not appear to be working as expected.”
Early in 2026, Varroa mites resistant to pyrethroid and formamidine chemicals (commonly used chemicals to control Varroa mites) were detected in New South Wales and Queensland.
The pyrethroid resistant Varroa mites detected in north-east Victoria are undergoing further analysis with results expected at the end of the month.
Agriculture Victoria is working collaboratively with beekeepers to ensure they have the tools and knowledge to effectively manage Varroa mites in their apiaries.
“Victoria’s two-year Varroa Transition Program is supporting best-practice management, with Bee Biosecurity Officers and apiary inspectors available to provide practical advice,” Ms Austin said.
“Our Bee Biosecurity Officers bring hands-on help and advice including surveillance techniques, chemical treatment options and how to schedule and plan for treatment.”
Victoria joined other Australian states, territories and industries in transitioning from eradication to management of Varroa mite based on the National Management Group decision in 2023.
The Victorian Government’s commitment to strong biosecurity helps protect communities, food supply and everyday life for Victorians.
More information is available on Agriculture Victoria’s Varroa mite current situation page and the Australian Honey Bee Industry Council website at honeybee.org.au.
