After only 2-4 months a cockroach is considered an adult. The females deliver eggs in sets of 36 that hatch within 4-6 weeks. They are difficult to discover since they are active by night but larger infestations are possible to be seen at daytime. They spread through pipe transit seals and leave traces in the form of small, black spots. Hepatitis B and salmonella are examples of diseases they may spread.

How to avoid them:

  • Keep pipe transit seal sealed.
  • Keep clean and tidy both inside your house.
  • Keep clean and tidy next to rubbish bins.
  • Keep clean underneath kitchen counter tops.

Suitable treatments: glue traps. Sometimes chemical treatments are necessary.