You're likely to have a cockroach problem with one or both of the 2 main species considered pests:
German Cockroach (Blattella germanica). This is a small species, light amber in colour, which 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.
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. 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.
When a cockroach infestation is out of control, Austrapest technicians use a 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.