Mouse plague crisis threatening WA grain crops and communities

Just now2 articles from 2 sources

Consensus Summary

Western Australia is facing a severe mouse plague threatening $1 billion in grain production, with infestations spiraling out of control in cropping zones like the Mid-West, Wheatbelt, and Goldfields-Esperance. Scientists and farmers report unprecedented numbers—up to 8000 mice per hectare in some areas—where rodents are devouring freshly sown seeds and invading homes, damaging food supplies. Both sources agree urgent action is needed, but farmers face delays accessing high-strength baits due to federal restrictions, compounding challenges from fuel shortages and low grain prices. The plague’s rapid reproduction—females breeding every three weeks—has been exacerbated by recent cyclonic rains, creating ideal conditions for mice to multiply. While both articles highlight the crisis’s severity, ABC provides more localized anecdotes and supplier data, whereas NEWSCOMAU emphasizes systemic issues like bait approval delays and long-term agricultural impacts. Contradictions exist in the exact scale of infestations and the effectiveness of current baits, but the consensus remains clear: without intervention, WA’s grain harvests and communities could suffer catastrophic losses.

✓ Verified by 2+ sources

Key details reported by multiple sources:

CSIRO research officer Steve Henry reported mouse numbers exceeding 2000–8000 per hectare in WA cropping zones (Mid-West, Wheatbelt, Goldfields-Esperance) as of 2024, with 4000 burrows/hectare documented in some areas.
Farmers in Western Australia are facing a plague-level mouse infestation impacting cereal crops (wheat, barley, canola) worth over $1 billion in production losses.
Steve Henry (CSIRO) stated mice are breeding rapidly—females produce 6–10 babies every 19–21 days, starting at six weeks old, leading to exponential population growth.
Residents in regional WA communities (e.g., Morawa, Ravensthorpe) report unprecedented mouse infestations in homes, including damage to food containers and pantries.
Farmers require federal approval to access high-strength mouse bait (ZP-50), which is currently restricted, delaying control efforts.
Recent cyclonic rains in WA have worsened the plague by creating favorable breeding conditions and increasing food sources for mice.

Points of Difference

Details reported by only one source:

NEWSCOMAU

WA Farmers chief executive Trevor Whittington called the outbreak one of the worst ever, emphasizing compounding issues like fuel crises, fertilizer shortages, and low grain prices.
Farmer Belinda Eastough noted mice numbers in homes reached ~40 mice/day during past plagues, and current bait effectiveness is reduced due to abundant alternative food sources.
Eastough stated property owners must manage mouse control via baiting, but current baits are less effective when mice have other food available (e.g., leftover grain).
Whittington mentioned farmers’ first crop germination is imminent, and mice will deplete seeds without intervention, leading to total crop loss in canola fields.

ABC

Pest controller Peter Cekanauskas reported consuming 7.5 kg of bait in <3 days on his property, estimating it could kill ~75 kg of mice, highlighting the scale of infestations.
ABC included visual evidence (supplied photos/videos) of mice in homes (e.g., chewing through plastic oats containers and UHT milk cartons) and grain paddocks (e.g., Ravensthorpe seed cleaner).
Steve Henry (ABC) compared current WA mouse numbers to the 2021 NSW plague, noting videos of ‘hundreds of mice running around’ in affected areas.
Henry emphasized farmers must bait *before* sowing crops to prevent seed consumption, warning of ‘significant [crop] losses’ if neglected.
ABC cited a supplier remarking increased sales of mouse chemicals in WA, corroborating widespread demand for control measures.

Contradictions

Conflicting information between sources:

NEWSCOMAU states farmers are seeing up to 8000 mice/hectare in some paddocks, while ABC only reports Henry’s concern at 200–300 mice/hectare as ‘cause for concern’ (though ABC later mentions 4000 burrows/hectare).
NEWSCOMAU implies current baits are less effective due to mice finding only 2–3 toxic grains amid abundant food, but ABC does not specify this mechanism—only that bait is being consumed rapidly.
NEWSCOMAU highlights federal approval delays for ZP-50 bait as a critical bottleneck, while ABC does not explicitly mention this approval process.
ABC provides specific anecdotes (e.g., Cekanauskas’s 7.5 kg bait consumption) and supplier sales data, whereas NEWSCOMAU lacks such granular examples.
NEWSCOMAU frames the plague as worsening due to ‘years of good harvests leaving grain behind,’ while ABC does not attribute the outbreak’s severity to prior harvest conditions.

Source Articles

NEWSCOMAU

Plague-level epidemic threatening state

An animal nearing plague-level numbers in one Aussie state is putting a billion-dollar industry under threat – with calls for urgent action....

Yesterday

ABC

Western Australia at risk of mouse plague 'spiralling out of control'

Grain paddocks in Western Australia are filled with thousands of mice which are making their way into residential areas....

1 April 2026