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 Singapore, 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.

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.
Life cycle and habits of the German Cockroach

Life cycle

  • Female produces 4 – 9 oothecae (egg case), each oothecae contain 37 – 44 eggs.
  • Nymphs take 30 – 60 days to mature into adults.

Habits

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

Dealing with cockroach infestations?

A heavy cockroach infestation often means sighting of adult and baby cockroaches crawling around even in the day. They cause potential dangers to health and safety as cockroaches are well-known as 'Pests of poor hygiene'.

Besides being unhygienic, cockroaches are able to reproduce fast and an infestation can get out of control quickly.

Rentokil offers cockroach control solution with residual spraying, gels and baits that are effective against an infestation. Consistent inspections and monitoring are required as well.

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.
Life cycle and habits of the American Cockroach

Life cycle

  • Female produces 10 – 90 oothecae (egg case), each oothecae contain 14 – 28 eggs.
  • Nymphs take 150 days to develop into adults.

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.
Life cycle and habits of the Brown Banded Cockroach

Life cycle

  • 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.