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German Cockroach Control London

Adult German cockroaches are 1/2 to 5/8 inch (12-15mm) long and tan to light brown in colour. Although they have fully developed wings, they do not fly. Nymphs are similar in appearance to adults except that they are smaller and lack wings, however many people with an infestation of german cockroaches often believe they have several different types of cockroaches infesting their homes. The German cockroach is best identified by its small size and by two dark parallel lines running from the back of the head to the wings. They are most frequently found in kitchens (near dishwashers, stoves, in cupboards and sinks) and in bathrooms of homes, although they will frequently infest every room of the property in time. German cockroaches usually prefer a moist environment with a relatively high degree of warmth, hence their preference for kitchens and bathrooms. These insects are mostly scavengers and will feed on a wide variety of foods stuffs found in most London homes and businesses. They are especially fond of starches, sweets, grease, and meat products. In many London properties, they feed on garbage and spillages if these are not cleared up quickly and thoroughly. As with other species, German cockroaches are mostly active at night (nocturnal), when they forage for food, water, and mates. During the day they hide in cracks and crevices and other dark sites that provide a warm and humid environment. Their relatively wide, flat bodies enable them to move in and out of cracks and narrow openings with ease. They may be seen during the daytime, particularly if a heavy population is present or if there is some other stress, such as a lack of food or water or in severe infestations the lack of harbourage areas. The German cockroach is the most successful of the species infesting homes, hotels, hospitals and restaurants etc in London. There are several reasons for this cockroach’s persistence and the difficulty in controlling them. German cockroaches produce a larger number of eggs per capsule and they undergo the shortest time from hatching until sexual maturity, resulting in a rapid population growth, often leading to an explosion of activity over a very short timeframe. A greater number of nymphs hatch successfully because the female carries the egg case (ootheca) during the entire time the embryos are developing within the eggs. German cockroaches are smaller than most other pest cockroaches and can conceal themselves in many places inaccessible to the larger species. German cockroaches have three developmental stages namely egg, nymph, and adult. Females produce a light brown, purse-shaped egg capsule that is aprox 6mm long and contains two rows of eggs. Each capsule contains up to 48 eggs, and adult females usually produce from four to eight egg capsules during her lifetime. At room temperature, one capsule is produced about every 6 weeks. Egg capsules are carried, protruding from the abdomen of the female until hatching time, when they are deposited in cracks and crevices that provide safety and the required temperature and humidity needs of the soon to emerge nymphs. It usually around 4 weeks for the capsule to hatch from the time it begins to form after mating with a male. Formation of the next egg capsule usually begins within a week or two. The length of the egg stage varies from 14 to 35 days, with six to seven nymphal stages (instars) occurring over a period of 6 to 30 weeks (this is dependant on the availability of food and water etc.). The life span of the adult female varies from 20 to 30 weeks. In one year over 10,000 descendants can be produced, assuming only two generations are produced per year. German cockroaches produce odorous secretions that can affect the flavour of various foods. When cockroach populations are high, these secretions may result in a characteristic odour in the general region of the infestation. Disease-producing organisms such as bacteria, protozoans, and viruses have been found on cockroach bodies and in their droppings. Different forms of gastroenteritis (food poisoning, dysentery, diarrhoea) appear to be the principal diseases transmitted by German cockroaches. The organisms causing these diseases are carried on the legs and bodies of cockroaches and are deposited on food and utensils as the cockroaches forage for food and water. Cockroach excrement (droppings) and cast skins also contain a number of allergens to which many people exhibit allergic responses, such as skin rashes, watery eyes and sneezing, congestion of nasal passages, and asthma. As you can see german cockroaches pose a very real threat to Londoners and should be treated by a professional London cockroach control company like ours as soon as activity is noticed or even suspected.

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