A Growing Rodent Problem, From Australia to the US

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July 23, 2026
4 min read

A Growing Rodent Problem, From Australia to the US

Rodent damage isn't just a UK story. Similar scenes are playing out on the other side of the world, from mouse plagues tearing through Western Australian farmland to rat infestations pushing American homeowners to their limit.

The Problem Is Bigger Than You Think

In Western Australia, a mouse plague has spread across the Mid West, Wheatbelt and Goldfields regions, with landholders reporting more than 8,000 mice per hectare, well above the roughly 800 that typically defines a plague, according to CSIRO researcher Steve Henry. Residents have described mice crawling into beds, chewing through car wiring, and causing thousands of dollars in damage to vehicles and belongings. Latham farmer Dylan Hirsch said the plague has already cost his operation around $1 million, between bait spending that has tripled and canola crops damaged badly enough to need resowing. Agriculture groups have warned the outbreak could cost the industry more than $1 billion nationally, and regulators have since approved a stronger bait to help landholders with the worst affected properties.

In the US, a rat infestation across Idaho's Ada County, including Boise and Eagle, has left residents feeling like they're on their own. One property owner reportedly spent around $20,000 trying to contain damage after a tenant heard noises in the walls. Another couple, Barbara and Doug Perry, tried traps, adhesives and cameras with little success, and at one point Doug caught a rat by hand after a camera alert woke him in the night. With legislation to formally classify rats as an invasive pest stalling, residents have largely been left to organise online and handle the problem themselves.

Why Is This Happening?

Rodents breed fast. A single pair can produce thousands of offspring in a year, so once numbers start climbing, they tend to climb quickly. Good conditions accelerate that further. In WA, favourable weather and food supply can trigger a plague almost overnight. In Idaho, irrigation canals and urban growth have given rats new routes into areas that were previously unaffected.

Once rodents move in, they don't stay contained to crops or gardens. They get into walls, vehicles, appliances and wiring, chewing through whatever is in their way because their teeth never stop growing and need to be worn down. That's what turns a population spike into structural damage, whether it's a chewed wiring harness in a ute or a wall cavity full of nests.

The bigger issue is that most of the response, in both regions, has been reactive. Bait, traps and cameras help after the fact, but they don't stop rodents from getting into infrastructure, vehicles and buildings in the first place.

A Smarter Way to Deal With the Problem

This is where CTech Corporation's Rodrepel™ comes in. It's a low toxicity, environmentally friendly rodent aversive that can be built into materials like cable sheathing, wiring insulation, and other vulnerable surfaces so they become unappealing to rodents before any damage occurs.

Instead of waiting for chewing to happen and then trapping or baiting afterward, Rodrepel™ works on contact, creating a mild aversive response that teaches rodents to stay away. That learned avoidance carries across individual animals and tends to spread through a population over time, so protection builds rather than fades.

It's available as a solid masterbatch for manufacturing into cable, wiring, and plastics from the start, a lacquer for coating surfaces already in use, and a liquid concentrate for treating exposed points like junction boxes and equipment housings. It's compliant with ROHS, ROHS2, REACH, ISO, APVMA, NEA and EU BPR, and is FIFRA exempted.

Whether it's a mouse plague costing farmers a billion dollars or rat infestation, residents are left to fight alone, the pattern is the same: damage happens because materials weren't protected before rodents arrived. Getting ahead of that is a lot cheaper than dealing with the aftermath.

Get in touch at technical.marketing@ctechcorporation.com to find out how Rodrepel™ can be built into your infrastructure or product protection strategy.

Visit us at: www.ctechcorporation.com | www.rodrepel.com | www.combirepel.com

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