A University of Tasmania study has examined how Varroa mites could affect crop pollination in Tasmania if the parasites become established. The research was triggered by the mites’ spread across mainland Australia, where they have damaged European honeybee colonies. Beekeepers can monitor and treat managed hives, but feral colonies remain unmanaged and face higher risks.
Entomologist Dr. Jonathan Finch noted that many Tasmanian crops depend on feral honeybees for pollination. Evidence from other countries indicates Varroa can cut feral populations by over 90 percent within a few years. Such a drop could weaken pollination for fruit, berry, and seed crops.
Apple orchards in the Huon Valley showed the clearest dependence on natural pollination services. Growers using few or no managed hives may need to adjust their strategies if feral bees decline.
Vegetable seed production relies heavily on managed hives. Rising costs or difficulties in maintaining hives could affect seed producers along with fruit and berry growers.
Tasmania remains free of Varroa, yet any arrival would carry major consequences for agriculture. The study reviewed grower surveys and hive placement data to identify crops and regions most dependent on background pollination.
Because managed and feral bees look alike in fields, direct measurement is hard. Comparing reported hive numbers with standard rates helps flag areas where natural services likely matter most.
Researchers advise growers to consult beekeepers on monitoring, treatment, hive strength, supply, and possible cost increases. They recommend assessing current reliance on managed versus natural pollination and preparing for reduced feral bee numbers and scarcer hives.
