Identification
The Oriental cockroach is dark brown to black in color and has a glossy appearance. Adults range from 1 to 1.25 inches in length. Males have short, non-functional wings covering about three-fourths of their abdomen, while females have only small wing stubs and are unable to fly. They have long antennae, six legs, and an oval-shaped body. Oriental cockroaches are slower-moving compared to other cockroach species.
Lifecycle & Reproduction
Oriental cockroaches undergo incomplete metamorphosis, consisting of egg, nymph, and adult stages. Females produce egg cases (oothecae) containing approximately 16 eggs, which hatch within 60 days. Nymphs take about 6 to 12 months to mature into adults, depending on environmental conditions. Adults typically live between 6 and 12 months.
Habits, Diet & Behavior
Primarily nocturnal, Oriental cockroaches prefer damp, cool environments and are commonly found in sewers, basements, and other moist areas. They feed on decaying organic matter, garbage, and starchy foods. They are less likely to infest indoor spaces compared to other cockroach species but are still a major nuisance.
Where You’ll Find Them / Typical Locations
Oriental cockroaches thrive in cool, damp, and dark areas, including:
- Basements and crawl spaces
- Sewer systems and drains
- Under sinks and around plumbing fixtures
- Mulch, leaf litter, and decaying plant material
- Near garbage disposals and compost bins
Threats & Danger
Oriental cockroaches are known carriers of bacteria and pathogens, spreading diseases such as Salmonella and E. coli. They contaminate food and surfaces, posing health risks. Their presence can also trigger allergic reactions and asthma symptoms in sensitive individuals.
Prevention
- Seal cracks and gaps around doors, windows, and foundation
- Eliminate excess moisture by fixing leaks and improving ventilation
- Store food in airtight containers and keep kitchen areas clean
- Remove decaying organic matter and maintain proper waste disposal
Signs of Infestation
- Sightings of dark brown or black cockroaches, especially in damp areas
- Fecal droppings resembling small, dark specks
- Egg cases (oothecae) found in dark, hidden locations
- A musty, foul odor in areas with high cockroach activity
How to Get Rid of It
- Use bait stations, insecticidal dust, and residual sprays in problem areas
- Apply insect growth regulators (IGRs) to disrupt their development
- Reduce moisture sources and improve sanitation to deter infestations
- Seek professional pest control services for severe infestations