Damage done by Cockroaches

Cockroaches spread human disease by depositing disease organisms on food and utensils. The American cockroach, which comes into contact with human excrement in sewers or with pet droppings, may transmit bacteria that cause Salmonella and Shigella. German cockroaches are believed to be capable of transmitting disease-causing organisms such as Staphylococcus, hepatitis, and coliform bacteria. They also have been implicated in the spread of typhoid and dysentery.



Cockroaches may become pests in homes, restaurants, hospitals, warehouses, offices, and virtually any structure that has food preparation or storage areas. These pests are common even in the cleanest of crowded urban areas and older dwellings. It’s usually not difficult to discover an infestation, because they are often visible.

German Cockroaches
Oriental Cockroaches
American Cockroaches

The typical signs of a cockroach problem are:

Seeing live insects – cockroaches are nocturnal and hide during the day. You will most likely see them when turning on the light in the kitchen at night

Egg cases and cast skins – cockroaches shed their skin 5-8 times as they mature

Droppings – cockroaches leave a dust of black droppings less than 1mm wide and of varying lengths

Odour – established cockroach infestations produce an unpleasant, musty smell

Damage - cockroaches will attack organic goods including leather and books

The 3 common species found in the home/premises:
German Cockroach

5/8” – German cockroach is brown in colour with 2 dark stripes on throrax. The wings are as long as the body or slightly overlapping in both sexes, despite this they prefer to run or climb. It prefers moist environments such as kitchen cabinets and bathrooms.

Oriental Cockroach

11/2“ – Dark brown to black in colour. The wings are underdeveloped in female but cover ¾ length of the abdomen in the male; both sexes prefer to run or climb. It prefers cool, damp environments like drains, sewer pipes and crawl spaces

American Cockroach

11/2” – The American cockroach is reddish brown in colour and has a pale yellow area around the perimeter of the pronotum. These cockroaches tend to be found in dark, undisturbed areas that are high in humidity.

Cockroaches spend 75% of their time squeezed into narrow cracks and crevices for safety. The most preferred harborages are those of the proper size that are located near food and water sources, and which are warm and have a high relative humidity. (Smith & Whitman, 1992)
Food Habits

Roaches themselves will eat anything, including one another. There is very little organic material that a cockroach won't eat. The list includes bark, leaves, paper, wool clothes, sugar, cheese, bread, oil, lemons, ink, soap, flesh, fish, leather, other roaches (dead or alive), or their own cast-off skins and egg-capsules. Some of these items, such as cellulose, can not be digested by normal means. However, like cows and other grazing animals, cockroaches have a symbiotic relationship with a bacteria that allows them to digest such substances. Although they feed on many kinds of food, they show a particular fondness for fermenting food.

Control of Cockroaches

There is a 5-step process for the control of roaches:

  • Prevention. This consists of inspecting all incoming items for cockroaches and oothecae, and making sure that the building is in good physical condition to reduce entry.
  • Good sanitation. Such practices reduce the amount of available harborage, food, and water.
  • Inspection. A thorough inspection using a flushing agent and flashlight is the key to successful control because it determines where the infestations/populations are and therefore, where treatment is required.
  • Initial insecticide application. This utilizes residual baits, insect growth regulators (IGR's), liquids, aerosols, lacquers, and/or microencapsulated pesticides usually placed in cracks and crevices but occasionally on surfaces or in voids, and the dusting of appropriate voids.
  • Follow-up or maintenance service. Such service consists primarily of inspecting with a flashlight and flushing agent and/or the use of monitoring traps to find missed or newly introduced cockroaches, and treating any active infestation found.
Gel Treatment
Using Gel is a better method of controlling Cockroaches. It has revolutionized pest control. You don't have the unpleasant smell of insecticides. You don't have to remove anything from the kitchen. You don't have to close your house and go away and there is no mess caused by spraying of insecticides', to be cleared.
How Gel Works
Gel has an edible product specially attractive to Cockroaches. Gel has cascading effect. Once some Cockroaches have eaten Gel they contaminate other Cockroaches also and the result is better control over the population of Cockroaches. Gel can be applied to sensitive areas such as electrical control boxes, kitchen appliances, computers etc. On which insecticides cannot be sprayed.
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