A study conducted by the Tasmanian Institute of Agriculture (TIA) highlights the significant risk that Varroa mites pose to crop pollination in Tasmania. The research, published on July 8, 2026, comes in response to the alarming spread of Varroa across mainland Australia, which has devastated European honeybee populations. If Varroa were to establish itself in Tasmania, the implications for local agriculture could be severe.
Impact of Varroa on Feral Honeybee Populations
According to Dr. Jonathan Finch, an entomologist at TIA, many agricultural crops in Tasmania rely heavily on feral honeybee colonies for pollination. “International experience suggests that Varroa can reduce feral honeybee populations by more than 90% within several years of establishment,” Finch stated. This decline could have dire consequences for pollination services that currently support crops, particularly fruit, berry, and seed crops.
For instance, apple production in the Huon Valley has shown a strong reliance on background pollination services, including feral honeybees. Finch emphasized, “If feral honeybee populations decline due to Varroa, apple growers who currently use few or no managed hives may need to review their pollination plans.”
Dependence on Managed Hives for Seed Production
The study also revealed that vegetable seed production is highly dependent on managed hives. “If Varroa increases the cost and complexity of maintaining strong hives, that could have implications for seed growers as well as fruit and berry growers,” Finch explained. Tasmania's current status as Varroa-free means that growers must be proactive in their preparations.
