Lessons from the Incursion of Myrtle Rust in Australia

Area of Science:

• Plant pathology
• Invasive species ecology
• Environmental biosecurity

Background:

• Austropuccinia psidii, or myrtle rust, is a neotropical rust pathogen with a history of causing significant damage to Myrtaceae family plants.
• The pathogen has spread globally, establishing in Hawaii in 2005 and reaching Australia in 2010, where eradication efforts failed.
• Seven years post-establishment in Australia, myrtle rust is causing declines in native plant species and impacting ecosystems.

Purpose of the Study:

• To highlight the urgent need for a nationally coordinated response strategy for the environmental impacts of myrtle rust in Australia.
• To emphasize the necessity of integrating environmental agencies into biosecurity preparedness, response, and management of invasive pathogens.

Main Methods:

• Review of the spread and impact of Austropuccinia psidii.
• Analysis of existing biosecurity frameworks and action plans in Australia.
• Identification of gaps in current management strategies for environmental pathogens.

Main Results:

• Myrtle rust has caused significant ecological damage in Australia, with many native myrtaceous species in decline.
• Australia currently lacks a nationally coordinated response strategy specifically addressing the environmental dimensions of the myrtle rust threat.
• There is a recognized need for greater involvement of environmental agencies in biosecurity, extending to post-establishment management of invasive pathogens.

Conclusions:

• Effective management of invasive environmental pathogens like myrtle rust requires a comprehensive, nationally coordinated strategy.
• Environmental agencies must be actively involved in all phases of biosecurity, from preparedness to long-term management of established threats.
• Failure to implement a coordinated environmental response risks further ecological degradation from invasive pathogens.