Cockroaches: What are they, how to get rid of them.
Cockroaches are one of the world’s most revolting creatures. Hygiene conscious people are repulsed by their habits of regurgitation and defecating on foodstuffs, dishes and cutlery. No matter what type of Cockroach you have in your area, disease and sickness is a byproduct of their presence in our environment.
Of the almost 400 known species of Cockroaches only about six species have become a serious pest of homes and industry in Australia. Being nocturnal creatures, Cockroaches become more active after dusk or when human activity has ceased for the night.
German cockroach, Blattella Germanica
- Adults average 13 to 16 mm in length
- Nymphs average 1.5 to 13 mm long
- Tan to light brown in colour, two longitudinal stripes on the pronotum
- Females are larger than males and may have an egg case protruding from the end of their abdomen
- Egg cases contain 30 to 40 young; each egg develops into an adult within 50 days.
American Cockroach (Periplaneta Americana)
- Adults average 32 to 54 mm in length
- One of the largest species to infest structures
- Found in northern and southern climates
- Males wings extend beyond the abdomen; female wings do not
- Prefer dark, moist areas near food sources and may enter structures through sewer pipes and floor drains
- Seek harbor in voids, including masonry, block voids, and of course the roof void (the space above the ceiling)
- Males can fly and are attracted to artificial light.
Australian Cockroach (Periplaneta australasiae)
- Adults can grow up to 32 mm long
- Closely resembles the American cockroach in size and colour
- Has pale yellow stripes at the base of the wing pads and the margin of the protonum
- Not commonly found indoors but will be found internal when temperatures are high
Oriental Cockroach (Blatta orientalis)
- Adults grow up to 25 mm in length
- Distinctively shiny and black
- Males wings take up 2/3 the length of the abdomen; female wings take up ¼ the length of the abdomen
- Does not fly and has difficulty climbing smooth surfaces
- Susceptible to dehydration, seeks moist areas in which to hide
- Usually found in basements, crawl spaces and the lower floors
- In southern climates may be found outdoors in leaf litter, beneath logs, and mulch
Smokybrown Cockroach (Periplaneta fuliginosa)
- Adults range from 32 to 38 mm in length
- Easily recognized by its uniform mahogany brown colour
- Found outdoors in the north
- Hides in mulch, leaf litter, ground cover, woodpiles and tree bark for protection against desiccation
- Often found dead indoors likely due to dehydration
- Typically enters a structure through the roof void and open spaces
- Both males and females can fly
BrownBanded Cockroach (Supella longipalp)
- Adults average 16 mm in length
- Similar in size and appearance to the German Cockroach
- Rather than longitudinal stripes found on the pronotum, they have two broad bands on their wings
- Prefer warmer areas but may be found in any area within a structure
- Not generally found in kitchen and bath area, as can be expected with German Cockroaches
- May be found in furniture, wall hangings, picture frames, light fixtures and ceilings
If you wish for further information or advice regarding Cockroaches, please contact your local Amalgamated Pest Control branch.