¼ to 1½ inch long.


Dark brown to black.

Smoky-brown cockroaches require high humidity for survival. They are found outside in wooded areas that provide shade and moisture. They can also be seen in protected areas around homes (tree holes and mulch) and in buildings and attics. Stacks of lumber and firewood, sewer-access openings and trash piles can contribute to infestations. Once in structures they are commonly found in attics or near fireplaces. These cockroaches can be attracted by a leaky roof.

Smoky brown cockroaches are good fliers and easily travel from trees on to houses. It is commonly attracted to homes to feed on trash containers and pet food on patios and decks. They are also attracted to light.

Normally they prefer plant material, but will eat almost anything when they come inside the home. They feed on plant material and may inhabit greenhouses.

  • Cockroaches have many negative consequences for human health because certain proteins (called allergens) found in cockroach feces, saliva and body parts can cause allergic reactions or trigger asthma symptoms, especially in children.
  • Cockroaches can also passively transport microbes on their body surfaces including pathogens that are potentially dangerous to humans. Cockroaches have been implicated in the spread 33 kinds of bacteria, including E. coli and Salmonella species, six parasitic worms and more than seven other types of human pathogens.
  • E. coli and Salmonella are classic causes of food poisoning, or gastroenteritis. Common symptoms include belly pain, severe stomach cramps and tenderness, diarrhea which can sometimes be bloody, nausea and vomiting. Some people can experience severe diarrhea, which will cause dehydration and may require hospitalization. In rare cases, the bacteria can spread to the blood stream and cause life threatening infections.

Smoky Brown roach Prevention TipsThe smoky brown cockroach has the reputation of being one of the most difficult cockroaches to control because it is so active and varied in its habitat.

Here is a list of tips and control methods to avoid a Smoky Brown Cockroach infestation:

  • Be sure that you maintain a clean and clear ventilation system. It will help keep those cockroaches away from those areas.
  • Install tight fitting screens around vents and possible entry ways.
  • Seal as many cracks and holes as possible on the exterior of the home.
  • Do not allow pet food to sit out overnight. Pick it up after outdoor pets are finished eating.
  • Eliminate piles of lumber and debris. Store firewood as far away from the house as possible, they may be possible harborages for these cockroaches.

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