Biosecurity warning for Aussie growers as new Italian Xylella outbreak confirmed
By Laura Thomas
A new Xylella outbreak in one of the world’s oldest olive-producing nations has prompted a timely biosecurity warning for Australian growers.
Late last week, Italian authorities confirmed Xylella had been detected in Calabria – the first outside the Puglia region.
The discovery has prompted extensive eradication and surveillance operations, as well as widespread concern due to Calabria’s pivotal role in the country’s olive oil production.
And it’s a concern shared by olive growers across the world.
While Australia remains disease-free, Xylella is considered the nation’s single highest pest threat, due to its potential to cause significant disease to a wide variety of native and cropping plants.
An outbreak here would be impossible to eradicate and devastate the agricultural sector, leading to significant economic loss and environmental damage.
Australian olive growers have remained on high alert following outbreaks in China and Italy in 2025, with the Australian Olive Association continuing to lead the charge on behalf of industry.
The organisation recently completed a review of the Biosecurity Plan for the Olive Industry, in conjunction with Plant Health Australia and government.
The document highlights the most critical pests and diseases threatening the olive industry, forming a crucial part of Australia’s biosecurity strategy.
It also outlines the current measures in place to minimise infection risk and actions to be undertaken in the event of an incursion.
AOA Chief Executive Officer Michael Southan said international trade created an ongoing biosecurity risk for Australia.
“There is just no place for complacency when it comes to biosecurity – we all have an important and ongoing role to play,” he said.
“Italian authorities have been working to control Xylella for some time, but despite best efforts, biological controls and vigilance, it just hasn’t been enough to prevent the spread.
“On-farm biosecurity best practice is key in maintaining our reputation as a producer of quality food and fibre – including world-class Australian olives.”
Biosecurity for the olive industry
Read more the development and release of the new Biosecurity Plan for the Olive Industry in the September edition of R&D Insights.
For more information on farm biosecurity best practice – including the six key ways to protect your property from an incursion – download the Biosecurity Action Plan for Olive Growers.
Sources:
Olive Oil Times
Australian Olive Association
R&D Insights
Biosecurity Plan for the Olive Industry