Cockroaches, known in 3 common species: Oriental cockroach (Blatta orientalis). German cockroach (Blattella germanica), American cockroach (Periplaneta americana) are pest insects infecting homes, restaurants, commercial and industrial premises. This pest is often introduced into buildings through the transportation of goods and equipment.
Cockroaches are known to carry a large number of diseases, dangerous to man, and if left untreated by a professional pest control technician, have the potential to reach epidemic proportions in a very short time span.
Cockroaches don't have a pupal (maggot) stage and after the egg (ootheca) hatches, which can be anything from four weeks to two months depending of the variety of cockroach, the young cockroaches known as nymphs appear in alarming numbers (anything between 16 and 28 nymphs for the Oriental and American cockroach, and an incredible 35-40 nymphs per ootheca per German cockroach.
German Cockroaches are light brown with two dark stripes on the thorax, 12-15mm in length and very good climbers. The Oriental Cockroaches are a dark brown to black colour, 17-30mm in size and can survive in cooler damp areas such as basements and conduits. These common cockroaches cannot climb smooth surfaces and are therefore more commonly found at ground level.
Oriental Cockroaches have a purse-shaped egg case called an ootheca that holds around 16 eggs and hatches after about 2 months. The German Cockroach egg case holds around 36 and hatches within 1 month. The ootheca of the Oriental Cockroach is dropped early in development and is often well hidden and tolerant to insecticide. This, along with the length of time it takes to hatch and the longer life span of the adult, makes control more difficult. The German cockroach carries the ootheca almost until it hatches and this protection combined with the fact that there are over twice as many eggs and that it hatches twice as fast means that this cockroach breeds much faster although control can be easier.
Cockroaches are associated with the spreading of disease organisms and provoke human revulsion
ORIENTAL COCKROACH – BLATTA ORENTAUS
- Dark brown to black, shiny and flat
- Well developed spinney legs
- 15-30mm body length
- Long flexible antennae
Habits and behaviour:
- Prefer warm humid environment
- Can tolerate cold conditions
- Colder conditions reduce breeding
- Will live in gaps and cracks around a food and water source such as sinks, cookers, drains, refuse areas, underground heating ducts
Signs of Infestation:
- Egg cases
- Faecal spotting
- Strong sour smell.