Mouse plague: A looming crisis for Australian grain farmers
The recent surge in mouse populations across Western Australia and South Australia has sparked concern among grain farmers, with the potential for widespread damage and economic disruption. This crisis, akin to the 2020-21 plague in eastern Australia, could have far-reaching consequences, impacting not only the agricultural sector but also the health and well-being of both humans and animals.
What makes this situation particularly alarming is the rapid breeding cycle of mice. Female mice can start breeding as early as six weeks old, producing up to 10 babies every 19-21 days. This exponential growth rate, coupled with the abundance of food sources, could lead to a devastating mouse plague. According to Steve Henry, a researcher at CSIRO, more than 800 mice per hectare is considered a plague, and reports from Western Australia indicate 3,000 to 4,000 burrows per hectare, a truly alarming figure.
The psychological impact of a mouse plague cannot be overstated. As Henry notes, "Mice aren’t like other problems that farmers have. If you’ve got a drought, you can go inside, and close the door and switch on the air conditioner and get a bit of respite from it. But, if you’ve got a mouse plague, you go inside and the mice are in the house and you literally can’t get away from them."
This crisis has sparked a call for action from various stakeholders. Andrew Weidemann from Grain Producers Australia has urged for access to higher-dose zinc phosphide (ZP) mouse baits, as the current ZP25 strength is deemed inadequate for control. Mark Fowler, president of the WA Farmers grains section, emphasizes the urgency of the situation, noting that seeding is already underway, making it the most effective time to implement baiting strategies.
The agriculture minister, Julie Collins, acknowledges the challenges faced by farmers, including the impact of the Iran war on fuel and fertiliser prices. She emphasizes the need to support farmers and ensure their ability to continue farming, despite the added pressures of the mouse plague.
In conclusion, the mouse plague poses a significant threat to Australian grain farmers, with potential economic, social, and environmental consequences. The rapid breeding cycle and abundance of food sources create a perfect storm for a devastating outbreak. As the situation unfolds, it will be crucial for farmers, researchers, and policymakers to work together to mitigate the impact and ensure the resilience of the agricultural sector in the face of this looming crisis.
