- Oriental Cockroach
- German Cockroach
The Oriental Cockroach is the most common species found in the UK. They are very dark brown, almost black in colour. The adult male is 20-24mm long and the female larger at 32mm long. They take between 6 months and 2 years to reach maturity. The female deposits around 5 egg cases (ootheca) each containing an average of 16 eggs laid at intervals. These harden and turn brown in colour when exposed to the air. The nymphs which emerge from the eggs are like small versions of the adults. As the nymph grows the outer surface of its body is cast away and this moulting will occur 7-10 times before adult size is reached. Oriental cockroaches are poor climbers on smooth surfaces and are tolerant towards the cold as they are often found outside buildings. Development is affected by the availability of food, humidity, temperature and day length.
The German Cockroach is smaller in size (13-16mm) and light brown. It is a good climber even on smooth surfaces. It matures much more quickly and the number of eggs in an egg case averages 30-40. Because of its size it is often carried unknowingly into homes in bags
Eradication of cockroaches can be difficult and should be carried out by a professional pest control operative.
Good hygiene is essential in preventing or limiting infestation. Cockroaches must be deprived of food, water and shelter. Washing up should be done promptly and food stored in sealed containers. Surfaces should be kept clean and food debris cleared up. Rubbish should be kept in lidded containers and carefully sealed when disposed of. Any leaking pipes should be repaired and moisture or water sources removed.
Last updated Thursday, 6th December 2018