Key Takeaways
- As of 24 March 2026, the APVMA restricts second-generation anticoagulant rodenticides (SGARs) to licensed pest control operators only, directly affecting warehouse baiting programs.
- SGAR bait stations for rat control must now be placed within 2 metres of buildings and inside secured, tamper-resistant stations; mouse baiting is restricted to indoor use only.
- Physical exclusion—sealing gaps, installing door sweeps, and hardening entry points—is now the most cost-effective frontline defence for warehouse managers.
- First-generation anticoagulant rodenticides (FGARs) remain available to general users but require longer feeding periods and more frequent monitoring.
- An Integrated Pest Management (IPM) approach combining exclusion, sanitation, monitoring, and targeted chemical control delivers the most reliable, regulation-compliant outcomes.
Understanding the 2026 APVMA Rodenticide Changes
On 10 March 2026, the Australian Pesticides and Veterinary Medicines Authority (APVMA) certified that all products containing second-generation anticoagulant rodenticides—including brodifacoum, bromadiolone, difenacoum, difethialone, and flocoumafen—are to be declared restricted chemical products. From 24 March 2026, the import and manufacture of new SGAR products is suspended for 12 months, and existing stock may only be purchased and applied by individuals meeting specific training and licensing requirements.
For Australian warehouse operators, this regulatory shift has immediate practical consequences. Facilities that previously relied on over-the-counter SGAR blocks placed around perimeters must now either engage a licensed pest management professional or transition to compliant alternatives. The regulations also mandate that SGAR use is limited to a maximum of 35 consecutive days without reassessment, and that operators must search for and dispose of rodent carcasses to reduce secondary poisoning of native wildlife such as raptors and quolls.
Why Autumn Is the Critical Season
In Australia's Southern Hemisphere calendar, autumn (March–May) marks a period of increasing rodent pressure on commercial warehouses. As overnight temperatures drop, the roof rat (Rattus rattus) and the Norway rat (Rattus norvegicus) actively seek warm, sheltered harbourage near food sources. The house mouse (Mus musculus) similarly moves indoors, exploiting gaps as small as 6 mm to access stored goods.
Warehouses present ideal harbourage: large, temperature-stable interiors with abundant nesting material such as cardboard, pallets, and plastic wrapping. Autumn coincides with post-harvest grain and produce movements across much of eastern Australia, increasing both the attractiveness of warehouse environments and the biosecurity risk of rodent contamination. Addressing exclusion before winter sets in is significantly more effective—and less costly—than reactive baiting during peak infestation.
Rodent Identification for Australian Warehouses
Roof Rat (Rattus rattus)
Slender body, large ears, and a tail longer than the head-and-body length. Roof rats are agile climbers that access warehouses via overhead cables, roof voids, and gaps around pipe penetrations. Droppings are spindle-shaped, approximately 12 mm long.
Norway Rat (Rattus norvegicus)
Heavier build with a blunt nose, small ears, and a tail shorter than the body. Norway rats typically burrow at ground level, entering through damaged door seals, broken vents, and service conduit gaps. Droppings are capsule-shaped, up to 20 mm long.
House Mouse (Mus musculus)
Small, with large ears relative to body size and a semi-naked tail. Mice are prolific breeders capable of producing up to 10 litters per year. They require only 3 g of food per day and can survive without free water in grain-rich environments. Droppings are rod-shaped, approximately 3–6 mm long.
Physical Exclusion: The Foundation of Compliance
Under the 2026 regulatory framework, physical exclusion has moved from a best-practice recommendation to a practical necessity. Where SGAR access is now restricted, warehouse managers must prioritise structural hardening to reduce reliance on chemical control. The following protocol aligns with autumn exclusion standards for Australian food distribution warehouses and general IPM principles.
Step 1: Conduct a Perimeter Audit
Walk the full external perimeter during daylight, documenting every gap, crack, or penetration greater than 6 mm (for mice) or 12 mm (for rats). Focus on:
- Roller-door base seals and dock levellers
- Service penetrations for plumbing, electrical conduit, and HVAC ducting
- Wall-roof junctions, especially where corrugated cladding meets brickwork or concrete tilt-up panels
- Ventilation louvres, exhaust fans, and roof-mounted plant access points
- Drainage grates and stormwater pipe openings
Step 2: Seal and Harden Entry Points
Use materials appropriate to the entry type:
- Metal flashing or galvanised steel mesh (6 mm gauge): for wall penetrations, pipe collars, and ventilation openings. Rats can gnaw through plastic, timber, and soft mortar.
- Brush strip or rubber sweep seals: for roller doors and pedestrian doors. Replace worn seals immediately—a 10 mm gap beneath a roller door admits mice within hours of nightfall.
- Expanding metal wool or copper mesh: for irregular gaps around conduits and service entries. Avoid steel wool alone, which corrodes in humid coastal environments.
- Concrete patching or mortar: for cracks in slab edges, pits, and loading dock aprons.
Step 3: Address Internal Harbourage
Reduce nesting opportunities by maintaining a 300 mm clearance between stored goods and walls (the "inspection aisle"), elevating all pallets at least 150 mm off the floor, and removing accumulations of cardboard, shrink wrap, and broken pallets. Good internal housekeeping directly reduces the carrying capacity of any rodent population that breaches the perimeter.
Compliant Baiting Under 2026 Rules
Where chemical control remains necessary—and in most large-scale warehouses, some baiting is unavoidable—the 2026 APVMA conditions impose strict operational parameters:
- SGARs: Restricted to licensed pest management professionals. Bait stations must be tamper-resistant, lockable, and secured in place. For rat control, stations must be placed within 2 metres of buildings. Mouse baiting with SGARs is restricted to indoor use only. Maximum treatment duration is 35 days before mandatory reassessment.
- FGARs (e.g., warfarin, coumatetralyl): Still available to general users. FGARs require multiple feeding events over several days to achieve lethal effect, necessitating more bait points and more frequent replenishment. Bait stations must still be tamper-resistant if placed in areas accessible to non-target animals.
Warehouse managers should work with a licensed operator to develop a bait station map, typically placing stations at 5–10 metre intervals along internal walls and at every entry point. All bait takes must be recorded, and dead rodents must be collected and disposed of appropriately to minimise secondary poisoning risk. Detailed guidance on rodent-proofing cold storage facilities offers complementary protocols for temperature-controlled environments.
Non-Chemical Control Methods
The regulatory shift toward SGAR restriction elevates the role of non-chemical tools in warehouse IPM programs:
- Snap traps: Effective for monitoring and population knockdown. Place along wall-floor junctions, behind racking, and near known entry points. Check and reset at least every 48 hours.
- Electronic monitoring traps: Battery- or mains-powered traps that deliver a lethal charge and send real-time alerts to facility managers. Particularly useful in large facilities where daily manual trap checks are impractical.
- Glue boards (where permitted): Some Australian states restrict or discourage glue boards on animal welfare grounds. Confirm local regulations before deployment.
- Ultrasonic deterrents: Evidence of long-term efficacy is limited. Rodents habituate to ultrasonic frequencies within days. These devices should not be relied upon as a standalone measure.
Sanitation and Housekeeping Protocols
Sanitation is the second pillar of any compliant warehouse rodent program. Key actions include:
- Sweep or vacuum spillage from receival and dispatch areas daily.
- Ensure all waste bins have tight-fitting lids and are emptied before overnight periods.
- Eliminate standing water sources, including drip trays, leaking taps, and condensation pools around cold-room door seals.
- Rotate stock on a first-in-first-out (FIFO) basis to avoid creating undisturbed nesting zones in deep racking.
- Maintain vegetation-free zones of at least 600 mm around external walls to eliminate cover for approaching rodents.
Monitoring and Documentation
Under current Australian food safety standards—including SQF, BRC, and HACCP frameworks—rodent monitoring must be documented and auditable. A compliant monitoring program should include:
- A numbered bait station and trap map reviewed quarterly.
- Weekly inspection logs recording bait take, trap catches, droppings, gnaw marks, and sightings.
- Trend analysis identifying seasonal spikes—autumn and early winter typically show the sharpest increases.
- Corrective action records demonstrating that exclusion gaps, sanitation failures, or bait resistance are addressed promptly.
Facilities preparing for third-party audits should consult the zero-tolerance IPM guide for cold storage distribution centres for documentation templates and audit-readiness checklists.
When to Call a Licensed Professional
Warehouse managers should engage a licensed pest management professional in the following situations:
- Any use of second-generation anticoagulant rodenticides, which are now restricted to licensed operators under the March 2026 APVMA ruling.
- Evidence of an established colony—consistent droppings, multiple sightings, or visible burrow networks—that physical exclusion and trapping have not resolved within 14 days.
- Rodent activity in food-contact zones or temperature-controlled areas where contamination poses a direct food safety risk.
- Pre-audit preparation for SQF, BRC, HACCP, or export accreditation inspections.
- Suspected insecticide or rodenticide resistance, indicated by continued bait uptake without population decline.
A licensed operator can conduct thermal imaging surveys, deploy professional-grade tracking powders (where label-compliant), and design a bait rotation strategy that mitigates resistance development. For facilities managing both rodent and spider risks—common in Australian warehousing—an integrated approach incorporating redback spider safety protocols is recommended.