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Common Cockroach Species

There are over 4,000 different species of cockroaches, which only about 40 species are considered pests while others are beneficial in their natural environment.

In Malaysia, German cockroach and American cockroach are commonly found. Knowing more about cockroach life cycle and habits can help us identify the most effective cockroach control methods.

Locations of Cockroach Infestations

Identifying the location of a cockroach infestation can depend greatly on the species of cockroach that has invaded your property. As mentioned above, some cockroach types prefer warm and humid areas, whilst others can tolerate cooler conditions.

  • Check bathrooms - right at the back of bathroom cabinets (especially if they are full of soaps and toiletry products that have been stored for a while) or medicine cabinets. Check plumbing behind sinks, baths and toilets, anywhere they can hide in sheltered dark spaces with access to water even if it's simply condensation. Cockroaches will happily eat soap residue, toilet paper and tissues - even shed skin cells and hair.

  • Check kitchens - look in cupboards and cabinets, pay particular attention to hidden areas with pipework such as under sinks and behind dishwashers. Sometimes cockroaches can be found in the upper inside corner of cupboards, hanging upside down out of sight. Nooks and crannies of appliances with motors, offering warmth and hidden crevices like backs of cookers, fridges and freezers are another area to check carefully. Even smaller kitchen appliances like microwaves, coffee makers, toasters and blenders could harbour cockroaches.

  • Check laundry rooms - cupboards under sinks, where plumbing enters through walls or floors leading to washing machines and tumble dryers. Also check warm areas near the motors at the back of washers and dryers.

  • Check basements - search along the base and corner joints of walls in cellars for any gaps cockroaches could squeeze through. Cracks in wood baseboards or floor cavities are opportune areas for them to hide. Cockroaches will hide in and eat cardboard and newspapers, so check boxes and piles of paper stored for long periods of time.

  • Check drains - as some species like Oriental cockroaches can survive in drier, cooler areas. Look around down pipes for cracks and crevices they might hide in, as well as damaged drain covers they could scuttle through. Other areas to check are pipe ducts and any opening beneath porches or decking. Undisturbed areas of garages and outbuildings may also offer shelter to Oriental cockroaches. They are also known to survive in rubbish tips.

Need to remove a cockroach infestation?

If you suspect a cockroach infestation in your property, you should arrange for professional treatments to get rid of cockroaches quickly. Call us today on 1300 882 911(business) or 1300 881 911(home)..

German Cockroach

(Blatella germanica)

Appearance

  • Adult is 10 – 15 mm in length.
  • Pronotum (head shield) has 2 dark longitude stripes.
  • Male is light yellowish brown in colour with longer tongue shaped body.
  • Female is darker in colour with plump abdomen.

Lifecycle

  • Female produces 4 – 9 oothecae (egg case), each oothecae contain 37 – 44 eggs.
  • Nymphs take 30 – 60 days to mature into adults.
  • Adult life cycle is more than 100 days.

Habits

  • Major pest in restaurants, hotels and apartments.
  • Prefers dark and secluded areas to harbourage such as under the cupboard and behind a refrigerator.

American Cockroach

(Periplaneta americana)

Appearance

  • Adult is 35 – 40 mm in length, one of the largest pest cockroaches.
  • Shining red to chocolate brown in colour.

Lifecycle

  • Female produces 10 – 90 oothecae (egg case), each oothecae contain 14 – 28 eggs.
  • Nymphs take 150 days to develop into adults.
  • Adult life cycle is 100 days to 3 years.

Habits

  • Prefers warm and humid environment such as drains and sewers.

Brown Banded Cockroach

(Supella longipalpa)

Appearance

  • Adult is 10–14 mm in length, one of the smallest pest cockroaches.
  • Yellow-brown stripes across the abdomen.

Lifecycle

  • Female produces up to 13 oothecae (egg case), each oothecae contain 16 eggs.
  • Nymphs take 55 days to develop into adults.
  • In ideal temperature conditions (30°c), adult lives 90 – 115 days.

Habits

  • Prefers warm and humid environment such as drains and sewers.

Australian Cockroach

(Periplaneta australasiae)

Lifecycle

  • Adult is 27 – 33 mm in length.
  • Brown in colour with lateral pale yellow stripe on its forewing.

Lifecycle

  • Female produces up to 12 oothecae (egg case), each oothecae contain 24 eggs.
  • Nymphs take 200 days to develop into adults.
  • Adult lives 120 – 180 days.

Habits

  • Commonly found in homes and around perimeter of buildings.

Next Steps

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