Australian farmers are battling a massive mouse plague that is devastating crops and infiltrating homes, with rodent populations reaching thousands per hectare in parts of the country. According to reports from the BBC and other outlets, the infestation is forcing producers to spend significant sums on re-planting crops and applying poison bait, creating a crisis that threatens both agricultural output and rural livelihoods.
Why are mouse numbers surging in Australia?
The current plague is largely driven by bumper harvests that provide an abundance of food for the rodent population. Agronomist and farmer Belinda Eastough, who works in Western Australia, noted that the region experienced a similar surge roughly five years ago. According to the BBC, farmers across Western Australia and South Australia began reporting plague-level numbers in March 2026. This influx follows a 2021 event where large areas of New South Wales and Queensland suffered what was then described as their worst plague in memory.
During the 2021 mouse plague in New South Wales, the situation became so extreme that hundreds of prisoners had to be relocated due to extensive damage caused by mice at their facility.
What is the impact on Australian farmers?
The economic and mental toll on farmers is profound. Geoff Cosgrove, a farmer managing 14,000 hectares in Mingenew, Western Australia, describes the experience as psychologically draining. “They do play with your mind – running around at night, in the ceiling, the air conditioning units,” Cosgrove told the BBC. He noted that he can hear and smell the rodents, comparing the experience to the presence of a “decaying body.”
Farmers are currently facing a “double-whammy” of stress. Beyond the destruction caused by the mice, they are navigating supply chain pressures regarding fuel and fertilizer, which have been complicated by the ongoing conflict involving the United States, Israel, and Iran, according to BBC reporting.
How are farmers managing the infestation?
Control efforts are both labor-intensive and costly. Farmers are spending hundreds of thousands of dollars on two primary strategies:
- Re-planting: Replacing entire fields of grain that have been devoured by the mice.
- Baiting: Laying down sterile seeds laced with mouse poison, a task that consumes precious hours during the planting season.
Cosgrove, who has been farming for 25 years, stated that he has only had to resort to baiting twice in his career, highlighting the severity of the current situation compared to previous years.
Monitoring grain storage and removing potential food sources near homesteads can help mitigate localized damage, though large-scale plagues often require coordinated regional baiting strategies.
Frequently Asked Questions
- Is this the worst mouse plague in Australian history?
- While the current situation is severe, farmers like Geoff Cosgrove have noted that the 2021 plague remains a significant benchmark for damage in parts of New South Wales and Queensland.
- How do farmers track the population?
- Farmers and agronomists monitor the number of mice per hectare. In affected regions, these counts have reached the thousands, prompting immediate intervention.
- What is the main cause of the plague?
- The primary driver is a surplus of food resulting from record-breaking harvests, which allows the rodent population to multiply rapidly.
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