Western Australia faces severe mouse plague threatening agriculture and homes
Consensus Summary
Western Australia is experiencing a severe mouse plague that scientists warn could devastate $1 billion worth of grain crops across regions like the Mid-West, Wheatbelt, and Goldfields-Esperance. Mouse numbers have surged to alarming levels, with estimates ranging from 200 to 8000 mice per hectare, far exceeding previous outbreaks. Farmers report mice destroying freshly sown seedsâparticularly in canola cropsâand residents in regional areas describe unprecedented infestations in homes, where mice chew through food containers and plastic. CSIRO researcher Steve Henry emphasizes the rapid breeding rate of mice, capable of producing hundreds of offspring per hectare in weeks, and urges immediate baiting before sowing crops to prevent yield losses. While both sources agree on the severity and agricultural risks, NEWSCOMAU highlights federal approval delays for stronger baits and cyclonic rains worsening the outbreak, whereas ABC focuses on logistical challenges like fuel shortages and widespread household infestations. Experts stress the need for urgent action to mitigate losses amid compounding issues like fertilizer shortages and low grain prices.
â Verified by 2+ sources
Key details reported by multiple sources:
- CSIRO research officer Steve Henry is warning about unprecedented mouse plague proportions in Western Australia's grain paddocks (ABC, NEWSCOMAU).
- Mouse numbers in WA are reported at 200â8000 mice per hectare, with some farmers seeing 4000 burrows per hectare (ABC: 200â300, NEWSCOMAU: 8000).
- Farmers in WAâs Mid-West, Wheatbelt, and Goldfields-Esperance regions are affected by the mouse plague (NEWSCOMAU).
- Mice are damaging freshly sown seeds, particularly in canola crops, causing significant yield losses (ABC, NEWSCOMAU).
- Steve Henry visited WA in 2022 and found the current mouse plague worse than previous years (ABC).
- $1 billion worth of grain crops in WA are at risk due to the mouse plague (NEWSCOMAU).
- Farmers are encouraged to bait before sowing crops to prevent losses (ABC, NEWSCOMAU).
- Mice are breeding prolifically, with females producing 6â10 babies every 19â21 days (ABC).
- Residents in regional WA communities report unprecedented mouse infestations in homes (ABC).
Points of Difference
Details reported by only one source:
- Peter Cekanauskas, a pest controller, found 12 mice in his pantry and consumed 7.5 kg of bait in under three days, estimating it could kill ~75 kg of mice (ABC).
- Steve Henry mentioned mice chewing through plastic containers, UHT milk cartons, and creating floods from nibbled containers (ABC).
- A resident told Steve Henry mice ate through a plastic container of rolled oats (ABC).
- Steve Henry noted videos of hundreds of mice running around at Ravensthorpeâs seed cleaner (ABC).
- Steve Henry said mice start breeding at six weeks old and can produce 600 mice per hectare in three weeks from 100 females (ABC).
- Farmers are reducing paddock movements due to fuel shortages, complicating bait distribution (ABC).
- CSIRO research officer Steve Henryâs quote: 'When you're getting over two to three hundred mice per hectare, then you've really got cause for concern' (ABC).
- WA Farmers chief executive Trevor Whittington called it one of the worst outbreaks threatening $1bn in grain production (NEWSCOMAU).
- Farmers are unable to access high-strength bait ZP-50 without federal approval (NEWSCOMAU).
- Belinda Eastough noted that leftover grain from good harvests created more shelter and food for mice (NEWSCOMAU).
- Bait effectiveness is reduced if thereâs abundant other food in the system, requiring mice to find toxin grains (NEWSCOMAU).
- Farmers previously caught about 40 mice per day inside homes during the last mouse plague (NEWSCOMAU).
- Trevor Whittington warned cyclonic rains would worsen the plague due to warm conditions (NEWSCOMAU).
- Steve Henry said some paddocks were seeing up to 8000 mice per hectare (NEWSCOMAU).
Contradictions
Conflicting information between sources:
- ABC reports mouse numbers at 200â300 per hectare as 'cause for concern,' while NEWSCOMAU states some paddocks have 8000 mice per hectare.
- ABC does not mention federal approval issues for high-strength bait ZP-50, but NEWSCOMAU highlights this as a major barrier for farmers.
- NEWSCOMAU states farmers previously caught 40 mice per day in homes during the last plague, but ABC does not provide this specific comparison.
- ABC focuses on mice damaging plastic containers and creating floods, while NEWSCOMAU emphasizes seed destruction in freshly sown crops as the primary threat.
- ABC mentions fuel shortages complicating bait distribution, but NEWSCOMAU does not reference this issue.
Source Articles
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