GERMAN COCKROACH EXTERMINATION AT
The German Cockroach is the most common among the house-infesting cockroaches in Toronto, Ontario.
The German cockroach is probably the most economically important pest. It is the most common cockroach you will find in a home or business. The German cockroach can be found in homes, apartments, hotels, motels, restaurants and other structures of residence and business.
The adults are about 1/2 to 5/8 inches long and have two dark stripes. Both sexes have wings but do not fly. Males can be distinguished from females by a tapering shape of the abdomen.
German cockroach babies, called nymphs, look like adults except they are smaller, have no wings and are darker in color, sometimes even black. One stripe running down the middle of the back is a prominent marking of the younger German cockroach nymph.
The female German cockroach carries the egg capsule protruding from her rear until the eggs are ready to hatch. The German cockroach is the only house-infesting species that carries the eggs capsule this long. This is what makes it the most persistent cockroach in the United States because they are less likely to be taken by predators.
The adult females can produce 4 to 8 egg capsules in their lifetime. Each capsule contains 30 to 48 eggs. It usually takes 20 to 30 days from the time of initial formation of the first egg capsule until it hatches. There are 6 to 7 nymph stages, called instars, until they molt into the adult stage. The nymphs have habits as adults. They are mostly active at night and hide in cracks and crevices during the day. Seeing German cockroaches during the day is usually an indication of over population. All cracks and crevices are full or food is in short supply and they are stressed.
The Habitat and Diet:
German Cockroaches are found in food processing areas and food storage areas, as well as other types of buildings. German Cockroaches are also found in sewers and basements, particularly around pipes and drains.
German cockroaches usually hide in areas where there is ample food and moisture such as kitchens and other food areas but they can be found in other areas if they are stressed and as a result of a repellent insecticide somewhere else in the building or home. German cockroaches are attracted to fermented foods and beverage residues. If water is present, adults can live about a month without food, but young nymphs will die of starvation within 10 days. Without food or water the adults will die in about 2 weeks.
A Cockroach’s Oothecae (aka Egg Case or egg Capsule) are also a tell tale sign of their presence. Each egg case contains 30-48 eggs. These egg capsules are then deposited on a surface in an area with good environmental and safety elements. Cockroaches would use secretions from their mouth to secure the egg case to the surface. German Cockroach’s eggs would hatch in about 20 – 30 days depending upon the ambient temperature.
Cockroaches can survive on very little carbohydrate food. But they must be able to maintain their body moisture. That’s why they live in tight spaces where the air hardly moves.
The Threats posed by German Cockroach
Cockroaches are capable of carrying many dozens of bacteria, parasitic worms, and many other kinds of human pathogens. They can pick up germs on the spines of their legs and bodies as they crawl through decaying matter or sewage and then carry these into food or onto food surfaces. Germs that cockroaches eat from decaying matter or sewage are protected while in their bodies and may remain infective for several weeks longer than if they had been exposed to cleaning agents, rinse water, or just sunlight and air. Recent medical studies have shown that cockroach allergens cause lots of allergic reactions in inner city children. Severe cockroach infestation has been shown to cause asthma in children. These allergens build up in deposits of droppings, secretions, cast skins, and dead bodies of roaches.
Since German Cockroaches are instinctively nocturnal, a daytime inspection of low scale may not result in affirmative assessment for lack of cockroach activity. German Cockroaches in general produce odorous secretions from various points in their bodies. Such secretions can affect the flavors of various foods. When German cockroach populations are high, these secretions may result in a characteristic odor in the general region of the infestation. Disease-producing organisms such as bacteria, protozoa, and viruses have been found in their bodies.