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Cockroach problem? If you need cockroach extermination, it's most like you have one or both of the 2 main species considered pests:

German Cockroach (Blattella germanica). This small species, light amber in colour, infests kitchens, water heaters, fridges and stoves. It is a prolific breeder and can take as little as 40 days to develop from hatching to adulthood. It is commonly transported to new locations in food packages, cardboard boxes and the like. Successful treatment of this pest involves close attention to cracks and crevices.
American cockroach (Periplaneta Americana), Smokeybrown cockroach (Periplaneta fulignosa) and Australian Cockroach (Periplaneta australasiae). These pests are larger and originate from outdoors. They are often found in subfloors, roof areas and wall cavities. The American cockroach is fully winged, meaning it can reach many household areas. Egg cases glued to packages may help in their dispersal. While exterior treatments may be sufficient, both interior and exterior areas may need to be treated to ensure the best possible coverage. 

DIY Cockroach Prevention:
A high level of sanitation and hygiene is important. Putting food away at night in sealed containers, sealing cracks and crevices, fixing leaky water pipes or taps and disposing of rubbish may help to prevent cockroach infestation. Always wash up after using the kitchen, and check your fridge door seals are in working order. 

A comprehensive survey and inspection is required to determine the extent of problems and methods of control. It is a good idea to get a professional spray every Spring before a cockroach problem can build. The products used by Austrapest not only treat adult cockroaches, but continue to treat cockroach hatchlings as they hatch throughout the season for a longer lasting impact than an over the counter spray. 
Pest Control Cockroaches:
When a cockroach infestation is out of control, Austrapest technicians use the safest possible range of Synthetic Pyrethroids, such as Permethrin and Deltamethrin, which are very effective in controlling cockroaches and are very low risk to human health. Typically it can take up to 4-6 weeks to gain control of an infestation. We highly recommend a follow up service every 6-12 months in the average household to maintain peace of mind. For commercial clients or in areas of major infestation, follow up services should occur every 1-3 months.

Life Cycle and Habitat:
Cockroaches are primitive insects, which probably originated from tropical or subtropical Africa about 300 million years ago. Of the 3000 species of cockroaches world wide, only a few species have reached pest status.  

Cockroaches are a medium sized insect, with flattened oval shaped bodies and legs suitable for crawling and running. Adult females can produce up to 30 egg cases and from a single purse shaped egg case (in the case of the German cockroach), 30-40 cockroaches can develop that are then capable of reproducing 2-3 months later. After 1 year, many thousands of individuals can develop. Cockroaches can go through 5-12 moults before adulthood and can change shape and colour in that time.
Cockroaches are nocturnal, omnivorous and are gregarious (they like to live in groups). They like cracks, crevices, and warm mild conditions. The average kitchen provides an ideal environment for cockroaches with all the requirements of food, moisture and shelter. They leave chemical trails in their faeces, as well as emitting airborne pheromones for swarming and mating. These chemical trails transmit bacteria onto surfaces. Other cockroaches will follow these trails to discover sources of food and water, and also discover where other cockroaches are hiding.


Sticky board

Patrick applying cockroach gel under a kitchen sink

Why Cockroaches Are Considered Pests:
Cockroaches’ indiscriminate manner of feeding in sewers and garbage bins brings them into contact with diseases such as salmonella, dysentery, typhoid, hepatitis and tuberculosis. They continually regurgitate their food, which makes any of our unprotected food stuff susceptible to contamination. They passively transport microbes on their body surfaces including those that are potentially dangerous to humans. Also, some people are allergic to cockroaches, which can cause asthma attacks and skin reactions in sensitive people. So yes, cockroaches are bad for your health.

Future research:
There is some research being done into biological control. For example, some wasps are natural predators of cockroaches. There is also research investigating the use of naturally occurring fungus to control cockroach infestations.


Austrapest and Kevmac together have been established in the Sydney Metropolitan since 1949, providing excellence in pest services.

Call us now on 1300 030 040 or email us

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Postal Address: PO Box 186, Concord Rd Concord West, NSW 2138, Australia

Phone: 1300 030 040

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