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Get to know the German Cockroach

(Blatella germanica)

German Cockroach

Appearance

  • The German Cock roach can be found world-wide.
  • German cockroaches are easily identified by 2 dark stripes on their pronotum (a prominent plate-like structure that covers all or part of the thorax of some insects).

Life cycle

  • Females carry 35 – 40 eggs in an egg case until they are ready to hatch.
  • Eggs hatch in 1 month.
  • Nymphs (an immature form of an insect that does not change greatly as it grows) take between 6 weeks to 12 weeks to develop into adults and live up to 6 months to develop into adults.
  • Adults grow to approximately 12 – 15mm in length.
  • Generally there will be 3-4 generations per year.

Habitat

  • Most commonly found indoors.
  • Prefers wet, humid conditions and are usually found in kitchens, bathrooms and commercial properties.

Bad – It is believed that the German cockroach harbours a number of diseases which could potentially have health issues to humans.

Get to know the Oriental Cockroach

(Blatta orientalis)

Oriental Cockroach

Appearance

  • Oriental Cockroaches are dark brown or black in colour.
  • Adults grow to approximately 20 -25mm long.
  • The wings are undeveloped in females, the male’s wings cover ¾ length of the abdomen.

Life cycle

  • Females deposit 16 eggs in an egg case.
  • Eggs hatch in 2 months.
  • Nymphs (an immature form of an insect that does not change greatly as it grows) take 6-18 months to develop into adults.

Habitat

  • Highly adapted for surviving in the natural environment. Oriental cockroaches thrive in cool, damp areas such as sub-floor voids, drains and openings beneath verandas.
  • They prefer to feed on garbage and decay, these insects can generally be found in rubbish tips and leaf litters.
  • The oriental cockroach runs rather than flies.

Bad – The Oriental Cockroach can contaminate food preparation areas, such as cooking utensils and bench tops with their droppings and egg cases.

Get to know the American Cockroach

(Periplaneta americana)

American cockroach on white

Appearance

  • The American cockroach is one of the largest pest cockroaches to invade homes and commercial properties in Australia.
  • The American Cockroach is a shiny red–brown in colour.
  • Adults grow to approximately 35 – 40mm long.
  • The wings in males are longer than the body; in the female, the wings overlap the abdomen.
  • The American cockroach runs but will fly at warmer temperatures.

Life cycle

  • The egg case contains up to 16 eggs and is carried by the female for several days before being deposited, sometimes glued down and tend to be grouped.
  • Eggs hatch in 1 – 2 months.
  • Nymphs (an immature form of an insect that does not change greatly as it grows) usually develop into adults in 6 -12 months and will live up to 6 – 12 months.

Habitat

  • The American Cockroach is also known as the ‘Palmetto bug’ because they live on trees.
  • The American cockroach prefers dark, humid and undisturbed areas, it can be found in sub-floor voids, roof voids, kitchens and bathrooms of homes.

Bad – The American Cockroach can contaminate food preparation areas, such as cooking utensils and bench tops with their droppings and empty egg cases.

Get to know the Australian Cockroach

(Periplaneta australasiae)

Australian Cockroach on white

Appearance

  • The Australian Cockroach is large in appearance.
  • The Australian Cockroach is reddish brown in colour with a yellow margin around the thorax and yellow edges on the forewings.
  • Adults grow to approximately 30mm in length.

Life cycle

  • Females deposit the egg case containing 24 eggs.
  • The eggs hatch after 40 days.
  • Nymphs (an immature form of an insect that does not change greatly as it grows) take 6 – 12 months to develop into adults and live up to 8 months.

Habitat

  • The Australian cockroach is common around urban areas. They are often seen in and around homes and gardens.

Bad – Despite its name, the Australian cockroach is not a native species, it is an introduced species from Asia. They can transmit disease by contaminating food.

Get to know the Brown Banded Cockroach

(Supella longipalpa)

IMAGE coming soon

 

Appearance

  • The Brown Banded Cockroach is one of the smallest pest cockroaches in Australia.
  • The Brown Banded Cockroach has yellow-brown stripes across their abdomen.
  • Brown Banded adult cockroaches grow to approximately 10 – 15mm in length.

Life cycle

  • The Brown Banded Cockroach carries up to 18 eggs.
  • Nymphs (an immature form of an insect that does not change greatly as it grows) usually develop into adults in 2 – 4 months and will live up to 3 – 6 months.

Habitat

  • They prefer warm, humid environments which leads them to dwell within heated buildings, ceilings, roof voids, inside and around appliance motors.
  • Very active at night, they are opportunistic feeders and mostly enjoy materials with high starch contents.
  • Brown banded cockroaches mostly stay on ground, but may fly in warmer conditions if disturbed.

Bad – The Brown Banded Cockroach scatter throughout residential and commercial buildings making them difficult to control. Sightings of individual Brown banded cockroaches in day light is usual.