These species, in tropical and subtropical origin, have evolved little since 400 million years ago. It’s estimated there are up to 4,000 different species worldwide.
They have adapted to urban environments with great success. Those we usually find in Spain are the so-called German or Coffee Cockroach (Blattella germanica), the Oriental Cockroach (Blatta orientalis), the American Cockroach (Periplaneta Americana) and brown-banded cockroach (Supella longipalpa).
Cockroaches can be vectors of diseases known as Salmonella or Escherichia Colli (diarrhea), but recent studies published by the World Health Organization (WHO) and published in the book “Public Health Significance of Urban Pest" are asthma and allergies the major concern from a health standpoint.
The “American Cockroach" (Periplaneta americana) is not native to America, but to North Africa. It is believed that it traveled by boat to the new continent, and from there took its name.
Its stage of development is very uneven, depending on temperature and humidity. The cycle before adulthood comes from 53 days of a “German cockroach" to the two years it can take as an “Oriental Cockroach".
Life expectancy of an adult is around 200 days, being the “Oriental Cockroach" the one who lives less (34 to 160 days.)
Their reproductive capacity is very high, being the “German cockroach" the most prolific, with some 20,000 individuals a year.
(Blattella germanica). Also known as “blonde cockroach" or “coffee cockroach."
• Length 1.2 to 1.6 cm., they are brown with two dark longitudinal stripes.
• They are most common in private homes, bars / restaurants or food stores.
• They are nocturnal insects: they feed at night and hide during the day. Preferably installed in wet areas and with easy access to food.
• They can eat anything (omnivorous) but can eat other things as clothing, toothpaste, soap, cosmetics, or glue if necessary.
• The German cockroach is very active, it’s highly mobile, moving, through cracks, cartons, sacks or interior of tiles.
• High reproductive capacity, has a life expectancy of 100 to 170 days.
(Periplaneta americana) in other countries, also known as “Palmetto bed bug" or “Canary of Bombay"
• Length of 3.5 to 5.4 cm. They are reddish brown, because their wings allow them to plan.
• They are great climbers and often live in sewers, drains, boilers, vents or bathrooms.
• They need warmer temperatures for development than the previous species (around 33 º C) for ideal development. They eateverything, but preferably fermented foods.
• Their life expectancy is 200-230 days.
• Length, between 1.1 to 1.4 cm. Its name comes from a distinctive brown stripe across the wings of the adult.
• It is usually found in homes in the area where you store vegetables, but also in ceilings, tables and high areas of the houses.
• Like the U.S., you need high temperatures to develop.
• Eats like its predecessors, everything.
• Their life expectancy is between 200-210 days.
Oriental Cockroach (Blatta orientalis). Also known as “black beetle " or “shad cockroach."
• They measure 3 to 3.5 cm. They are black. They are what they call “roach or beetle" par excellence.
• They live in sewers, although in recent years are being displaced by American cockroaches, also in trash. dead spaces, basements.
• It withstands low temperatures.
• They are omnivores with a preference for starchy foods.
• Their life expectancy is very varied, ranging from 50 to give 180 days depending on conditions.