The invasive varroa mite on a bee.

Varroa mite could benefit wildlife

Associate Professor Patrick O'Connor from the University of Adelaide believes there may be silver lining to the varroa mite outbreak.
October 5, 2023

WHILST establishment of the invasive varroa mite will have major impacts on Australia’s bee-keeping industry, it may deliver benefits for Australian wildlife by acting as an environmental biocontrol for feral honeybees, according to the Biodiversity Council.

The varroa mite is a parasitic mite that lives on European honeybees and can cause the collapse of bee colonies. Since it was detected in Australia 15 months ago around $130 million has been spent with the aim of eradicating the incursion due to risks to Australia’s commercial honey industry and crop pollination services.

Government and industry groups have now shifted to containment and control following the failure of eradication efforts. Hygiene and management approaches will now be used by the industry to protect individual hives.

Biodiversity Council member Associate Professor Patrick O’Connor from The University of Adelaide said that the varroa mite is likely to inadvertently deliver substantial benefits for Australian wildlife.

“Since European honeybees were introduced to Australia around 200 years ago they have established in the wild where they compete with native animals for tree hollows, pollen and nectar,” Prof O’Connor said.

“Competition from feral honeybees is recognised as a key threatening process to native wildlife.

“If the mite spreads through the massive feral bee population in our native ecosystems and knocks it down, it will give many native animals a chance of recovery.

“Native pollinator insects would benefit, as would animals that feed on nectar and pollen like honeyeater birds and pygmy possums. Hollow-nesting species like parrots, owls, possums and gliders will also benefit.

“For these recoveries to take place it is important that apiarists do not expand further into native vegetation with managed hives, or our native animals will just exchange competition with feral bees for competition with commercial bees.”

Biodiversity Council acting executive director James Trezise said while devastating for the bee-keeping industry, the failure to prevent varroa mite establishing highlights the growing pressures on Australia’s biosecurity system.

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