Cockroaches

Cockroaches are one of the main infestations in Portugal. Not only do they multiply in dirty places, they can also come in packaging from abroad, cracks and sewers.

In Portugal there are some types of cockroaches. Below we indicate the 3 main:

1. German cockroach (Blattela germanica L.) - small

Adults: Light brown to dark brown and about 10-15 mm long. In females the wings cover the entire abdomen and in males the wings do not cover the end of the abdomen. They have a carapace on the back of the head with two blacklists
Nymphs: They have a general appearance very similar to that of adult insects. They have no wings and are usually darker.
Egg capsules: 7-9 mm long with significant protrusions showing the different eggs (about 40).
Preferred temperature: 30ºC.
Incubation period of encapsulated eggs: 17-35 days
Duration of the nymph phase: 6-31 weeks
Lifespan of an adult female: 14-26 weeks
Number of descendants per year: Approx. 20,000 (including 2nd generation)
Ideal habitat: Hot and dry places with access to water. They are usually found in private homes, restaurants, hotels, kitchens, etc. They can fly.

2. American Cockroach (American Periplaneta) - large

Adults: Reddish brown, with light yellow or dark stripes around the carapace and about 35-40 mm long. Both males and females are roughly the same length, however, the females are more robustes
Nymphs: Similar to adult insects but without wings and with the most pronounced stripes.
Egg capsules: 8-10 mm long, light brown to reddish with pronounced protrusions showing the eggs.
Preferred temperature: 27ºC
Incubation period of encapsulated eggs: 37-109 days.
Duration of the nymph phase: 7-31 weeks
Lifespan of an adult female: 13-24 weeks
Number of descendants per year: Approx. 600 (including 2nd generation)
Ideal habitat: Hot and dry places with access to water. They are usually found in sewers, bathrooms, electrical boxes, etc.

3. Oriental Cockroach (Blatta Orientalis)

Adults: Brown to shiny black. Females are about 30 mm long, wide body with small paws instead of wings. Males are about 26mm long, with a narrow body. The wings cover 2/3 of the abdomen.
Nymphs: General appearance similar to that of adults, without wings and generally darker.
Egg capsules: 10-12 mm long, with no protrusions identifying the egg position (16-18).
Preferred temperature: 30ºC
Incubation period of encapsulated eggs: 37-81 days.
Duration of the nymph phase: 6-31 weeks
Life span of an adult female: 5-26 weeks
Number of descendants per year: Approx. 200 (including 2nd generation)
Ideal habitat: Cool and humid places. They are usually found in humid areas such as basements, sewers, garbage, etc. They usually run instead of flying.