Mouse plague devastates Western Australia and other regions, threatening crops and health
Consensus Summary
A severe mouse plague has overwhelmed Western Australia’s Mid West, Wheatbelt, and Goldfields-Esperance regions, with mouse populations reaching up to 8,000 per hectare in some areas. The outbreak, fueled by a record grain harvest and summer rain, has spread from farms into towns like Morawa and Northampton, invading homes, businesses, and public buildings. Residents report constant cleaning of carcasses, property damage, and health risks, while farmers face crop losses and machinery destruction. The Australian Pesticides and Veterinary Medicines Authority approved a stronger bait (ZP50) to accelerate mouse deaths, though experts warn it is not a complete solution. The WA Health Department issued a public health alert, and CSIRO researchers compared the plague to the 2021 NSW outbreak, which cost $660 million. While the stronger bait may reduce numbers quickly on farms, mice in urban areas will require separate control efforts, and the plague’s end depends on factors like food shortages, disease, or cold weather.
✓ Verified by 2+ sources
Key details reported by multiple sources:
- A mouse plague is affecting Western Australia’s Mid West, Wheatbelt, and Goldfields-Esperance regions, with up to 8,000 mice per hectare in some paddocks.
- The Australian Pesticides and Veterinary Medicines Authority (APVMA) approved an emergency permit for farmers to use a stronger bait (ZP50, 50g/kg zinc phosphide) to combat the plague.
- The WA Health Department issued a public health alert urging residents in Morawa and surrounding areas to handle dead mice safely and maintain high hygiene standards.
- CSIRO Research Officer Steve Henry compared the current WA mouse plague to the 2021 NSW outbreak, which cost approximately $660 million in damages.
- Mice are invading homes, businesses, and public buildings in towns like Morawa and Northampton, causing health risks and property damage.
- The plague began after a record grain harvest in Western Australia, with abundant food and summer rain contributing to rapid mouse breeding.
- Farmers are reporting mice chewing crops, wiring, and machinery, with some losing entire harvests or needing to re-seed paddocks.
Points of Difference
Details reported by only one source:
- Morawa Shire President Karen Chappel described the situation as 'horrid,' noting the constant task of cleaning up carcasses and the foul odor of mice.
- A roadhouse operator in Morawa, Jamie Appleton, stated that the plague has added an extra hour to daily cleaning and that some residents cannot afford to replace damaged goods.
- Scientists warned the plague could threaten $1 billion worth of grain crops in Western Australia if urgent action was not taken.
- Farmers found about 4,000 burrows per hectare in affected regions, with some paddocks recording up to 8,000 mice per hectare.
- Appleton expressed hope for cold weather to reduce the mouse population, calling them 'little b*****ds.'
- Citizen science website FeralScan shows mouse reports across grain-growing states, including western Queensland, northern NSW, and near Adelaide CBD, with extensive hotspots in WA.
- The standard bait (25g/kg zinc phosphide) requires mice to eat two or three poisoned grains to die, but the stronger bait (50g/kg) kills them after eating just one grain.
- Some farmers described mice 'vacuuming up' newly planted seeds, forcing re-seeding at high costs during record fuel and fertilizer prices.
- Mice are damaging cars and farm machinery by chewing wiring and hoses, with one example showing a radiator hose failure due to mouse damage.
- The CSIRO map from March showed widespread mouse distribution, and the plague’s end typically depends on food shortages, disease, or cold weather.
Contradictions
Conflicting information between sources:
- Newscomau states the WA Health Department issued a health alert 'urging people in Morawa and surrounding areas to stay safe handling dead mice,' while ABC does not specify the exact towns in its health alert description.
- Newscomau mentions a $1 billion threat to grain crops, while ABC does not provide a specific dollar figure for crop losses but emphasizes widespread damage.
Source Articles
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