Cockroaches

The two main common species of cockroach that we see throughout Britain are:

Oriental Cockroach “Blatta orientalis”

Although its name suggests it originates in the Far East, it probably originated in North Africa. It is regarded as the most common cockroach in the UK. 17 – 30mm in length. Cockroaches are regarded as a major health pest, They are primarily a nocturnal pest and can be found in harbourages  in cracks, crevices, Underground heating ducts and also in drains, sewers, refuse tips and outdoors near buildings. When inactive they form groups in there harbourages, attracted by aggression pheromone. The oriental cockroach can only climb rough surfaces, not smooth surfaces. Cockroaches are omnivorous and can eat a wide range of foodstuffs, but need access to free water. They also eat animal faeces, (each others) and are cannibalistic. Due to their eating contaminating foodstuffs, they are capable of spreading diseases. They can also come into contact with pathogenic micro-organisms, which are found in kitchens and hospitals.
Oriental Cockroach
Their exposure to disease organisms is considerable. These organisms can be found on the outside, and within the gut of the cockroach. Due to the cockroach being nocturnal specie, they are rarely seen in daylight, unless disturbed from there harbourage. So at first it is not always obvious that you have a cockroach problem until high numbers are reached. They also emit an unpleasant sour smell which is noticeable in a large infestation. The female cockroach carries her eggs in a purse shaped egg case, which is called an ootheca. The ootheca holds 16 eggs, which would normally hatch within 6-12 weeks. The ootheca of the oriental cockroach is tolerant to insecticide. Also taking into account that the ootheca, tends to be hidden in cracks and crevices Makes control more difficult. The thoroughness of treatment is all important. Surface sprays are recommended in adjacent premises or rooms to intercept wandering individuals. With the right programme, and the correct active ingredient over a sustained period, will lead to effective control.

German Cockroach “Blattella germanica”

German Cockroach
Its common name suggests it to be of European origin, but in fact it originated in North Africa, 12-15mm in length. Cockroaches are regarded as a major health pest In the UK the German cockroach is only ever found in heated buildings and Prefers warm humid environments. Unlike the oriental cockroach, it is not normally found outside or in underground heating ducts. They are primarily a nocturnal pest. And can be found in narrow harbourages, in cracks, crevices, close to food and water. When inactive they form groups in there harbourages attracted by aggression pheromone. The German cockroach can climb rough and smooth surfaces. Cockroaches are omnivorous and can eat a wide range of foodstuffs, but need access to free water. They also eat animal faeces, (each other’s) and are cannibalistic. Due to their eating, contaminating foodstuffs they are capable of spreading diseases. They can also come into contact with pathogenic micro-organisms, which are found in kitchens and hospitals.

Their exposure to disease organisms is considerable. These organisms can be found on the outside and within the gut of the cockroach. Due to the cockroach being nocturnal specie, they are rarely seen in daylight unless disturbed from there harbourage. So at first it is not always obvious that you have a cockroach problem until high numbers are reached. They also emit an unpleasant sour smell which is noticeable in a large infestation. The female cockroach carries her eggs in a purse shaped egg case which is called an ootheca. The ootheca holds 30-40 eggs, which would normally hatch within 2-4 weeks. Also taking into account that the ootheca, tends to be hidden in cracks and crevices makes control more difficult. The thoroughness of treatment is all important. Due to their climbing ability, harbourage areas above ground level should also be treated. Surface sprays are recommended in adjacent premises or rooms to intercept wandering individuals. With the right programme, and the correct active ingredient over a sustained period, will lead to effective control.

 

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