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Cockroaches

Cockroaches

Negative Characteristics: Cockroaches spread disease through infecting our food.

Redeeming Characteristics: Whilst living alongside us, none.

Quick Tips:

  • Hygeine is the cockroachs' greatest enemy. Make sure to eliminate all sources of food, water and shelter.
  • Cockroach traps are good if replaced regularly, see below for the best ones.
  • Sprays and powders are highly effective but be sure to get the insecticide into all cracks and crevices.
  • There are some good non-toxic sprays and powders available, see below.
  • A multi-pronged approach to control is best.

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Cockroaches: Description & Life Cycle

The two principle species encountered in Britain are:

German Cockroach description:

  • adult is 10 - 15mm ( 1/2 inch) long
  • yellowish brown in colour 
  • two distinctive longitudinal dark lines down it's body
  • long whip-like segmented antennae
  • full set of wings but do not fly.
  • can easily climb rough and smooth surfaces.

German Cockroach life cycle:

  • female produces 4-8 egg capsules at monthly intervals
  • each capsule contains up to 30 eggs and are carried by female until ready to hatch
  • nymphs soon emerge and go through 5-7 moults before reaching adulthood
  • egg to adulthood takes 5-10 months depending on temperature and food supply
  • adults live approx. 8-9 months thereafter

Oriental Cockroach description:

  • adult is 20-24mm (1.25 inches) long
  • dark brown or black in colour
  • long whip-like segmented antennae
  • female wings are stumps
  • male wings reach 3/4 down length of body
  • can climb rough but not smooth surfaces

Oriental Cockroach life cycle:

  • female produces 5 egg capsules at monthly intervals
  • each capsule contains up to 16 eggs and are usually cemented to a surface
  • nymphs emerge 6-12 weeks later and go through 7-10 moults before reaching adulthood
  • egg to adulthood takes 10-24 months depending on temperature and food supply
  • adults live approx. 4-5 months thereafter