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Oriental Cockroach

Blatta orientalis

Actual Size: 1.8-2.9 cm

Characteristics: One of the darkest species of cockroach, the Oriental cockroach is dark brown or nearly black. Both males and females have flightless wings.


  • Oriental cockroaches are omnivorous, feeding on a wide variety of plant, protein, and man-made products.
  • They prefer dark and humid hiding spaces.
  • They are mostly nocturnal, and scatter when a threat or light is presented suddenly.
  • Oriental cockroaches can be especially elusive, and inspection of an infested dwelling may not produce any evidence of infestation.
  • They are a larger species of cockroach.




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Pest Description

Oriental Cockroach Behavior

Because of their omnivorous and opportunistic feeding habits, Oriental cockroaches will be found in large numbers in restaurants, multifamily housing structures, residential homes, and hospitals. They will feed on all types of food, and also paper products, glue, dandruff, and other non-food items. Despite being among the larger species of cockroaches, the flat body of the Oriental cockroach enables it to hide in small cracks and crevices. Nocturnal and extremely aware of perceived threats, cockroaches exhibit scattering behavior when approached, especially with light. This insect frequents porches, basements, attic, crawl-spaces, and other protected, seldom-used areas. Oriental cockroaches have a strong preference for moist, humid areas, though they will nest indoors or outdoors. Compared to other cockroach species they are not prolific breeders, but if conditions are optimal their population will thrive.

Problems Caused by Oriental Cockroaches

The Oriental cockroach can be a significant health concern, as well as a difficult nuisance. Cockroaches can contaminate food products with their bodies or their waste products, and they have been known to carry Salmonella on their legs, depositing it on food items they run over. Cockroaches may also leave a disturbing odor in areas where infestation has taken place, or leave a similar odor in contaminated food. There are some people who have asthma reactions when in contact with cockroaches or places they have infested.

Preventing Oriental Cockroach Invasions

Proper sanitation and cleanliness are the two most important ways to prevent cockroaches; the Oriental cockroach gravitates toward areas that are poorly cleaned, as there is a wide variety of food available. If there is adequate food, water, and shelter, the cockroach will find a way to inhabit the space. It is nearly impossible to exterminate cockroaches in poorly cleaned spaces. Sealing small gaps underneath doors, around windows, and interior molding will help keep cockroaches out as well.

Eliminating and Controlling Oriental Cockroach Infestations

Cockroaches can become a problem indoors very quickly. In multifamily housing situations, or any commercial space where there are shared walls, there may be another area contributing to the cockroach infestation outside of direct control. It’s always best to call a professional when cockroaches are sighted. A thorough inspection of the premises can determine the best course of action. There are a number of treatments available for roach control, but a professional expert can advise on the best ways to employ those methods. Ongoing prevention may also be necessary for a permanent resolution, and a pest control professional can provide continual assistance to eliminate and control Oriental cockroaches. At Pest Control Inc, we use a variety of different treatment techniques, including surveillance, baiting, and exclusion solutions.


Call us at (702) 385-1269


or click the button, and we’ll call you back in minutes!