Oregon is located in the Northern region, and Cockroach infestations are not a severe problem for the residents living here as the cockroaches here generally prefer to live outdoors, specifically in woods, but not maintaining hygiene can result in the occurrence.

The most common species of cockroaches in Oregon is:

German cockroach

German cockroach

Latin Name: Blattella germanica

Description

These cockroaches are a significant worry as they like indoor locations. These are small in size, ranging from 1/2 inch to 5/8 inch in length and medium yellowish-brown in color. German roaches can be distinguished from other cockroaches by two dark parallel stripes on the anterior, dorsal portion of the thorax.

Place of exhibiting

The preferred habitats by these cockroaches are Kitchens, bathrooms, and other locations that provide food, moisture, warmth, and shelter. These are most common in bathrooms, kitchen sinks, and commercial kitchen environments.

Lifecycle

The German cockroach breeds throughout the year and favors a humid environment. A life cycle takes about three months to complete. The German roach produces more eggs per capsule than other species, and its nymphs achieve their growth in a relatively shorter period. Female cockroaches carry their egg capsules until they are ready to hatch. The average incubation period is nearly 28 days, and the eggs in a single capsule are usually between 30 to 40. Females at room temperature may produce 4 to 5 capsules. The time for nymphs to mature to adults averages around 103 days. They progress through 6-7 instars in 60 days for males and 65 days for the females. The lifespan of these roaches is approximately 100 days.

Other Cockroaches that can be spotted occasionally are listed below:

Brown-banded cockroach

Brown-banded cockroach

Latin Name: Supella longipalpa

Description

It is one of the smallest of the invasive cockroaches, and the adult brown-banded cockroach may reach a length of 11 to 14.5 mm and tan to light brown. Brown-banded cockroaches get their name from the two lighter bands they have across their dark brownish bodies. The adult male has long wings that cover the abdomen while the females have short wings.

Place of exhibiting

They are commonly found on ceilings, higher on walls, behind photo frames, and near motors of refrigerators and other electrical appliances. They also reside in electrical switches, closets, and furniture. They generally thrive in temperature between 25 and 33 °C.

Lifecycle

Female Brown-banded roaches carry their egg capsule for a few days, and later on, attach it to a protected surface. Each capsule contains around 14-18 eggs. It takes about 160 days for offspring to become grown-up adults. The brown-banded cockroach can live for about 206 days.

American cockroach

American cockroach

Latin Name: Periplaneta americana

Description

These cockroaches are giant up to 1.5 inches, have wings, and are reddish-brown with a lighter border over the head.

Place of exhibiting

They occur in the dark, damp, warm areas, often near steam pipes, in sewers, grease traps, wet basements, etc. They mostly happen to be in restaurants, grocery stores, bakeries, breweries, pet shops, and other establishments where food is prepared or stored.

LifeCycle

A female roach lays around sixteen eggs at a time and produces six to fourteen ootheca during her lifetime. The average incubation period is 44 days, which makes up to 224 offspring. American cockroaches go through 10 to 13 stages before adulting. This process of reaching adulthood takes an average of 600 days. Male cockroaches can survive up to 362 days, whereas females can live over 700 days. They can survive for up to two years, which is much longer than other types of cockroaches.

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