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Insect Control

Cockroaches

cockroach

What are cockroaches?

Cockroaches are mostly tropical insects. Those that are found in the colder climates, such as Winnipeg, are those that enter buildings. In buildings, cockroaches can become a serious pest. Fortunately, cockroaches are not known to carry a specific disease. However, they do feed on all sorts of things including human food, fabric and book bindings. Winnipeg has three species of cockroaches: American, German, and Oriental.

 german cockroachGerman Cockroach

What are German Cockroaches?

The German cockroach is small, 12 to 16 millimeters in length. It is pale to dark brown in colour and has two dark brown stripes behind the head. Immature cockroaches have stripes running the full length of its body. The German cockroach leaves an offensive odor wherever it has walked.

 American cockroachAmerican Cockroach

What is an American Cockroach?

The American cockroach is large, 38 to 50 mm in length. It is reddish brown in colour with yellowish edges and markings behind the head. The front wings have a yellowish stripe along the front edge.

What is an Oriental Cockroach?

The Oriental cockroach is a medium to large-sized cockroach, 25 to 35 millimeters in length. It is black to very dark reddish brown in colour. The adult male has very short wings while the female has only wing stubs.

What is the life cycle of a cockroach?

Adult female cockroaches may live a year or more when conditions are good. The female lays 12 to 25 eggs in rectangular cases. The female often carries the case before attaching it to an object in a sheltered location. It can take two to three months before the eggs hatch. It can take four months to one year for a cockroach to be fully grown.

What do cockroaches eat?

Cockroaches feed on many things including human food, book bindings and fabric. They also feed on decaying plant material.

Where are cockroaches found?

Cockroaches are shy insects and like confined spaces. They prefer warm moist areas. You can often find cockroaches in drawers, cupboards and closets and under sinks and stoves. A favorite spot is a refrigerator’s motor area.

What can I do about cockroaches?

Cockroaches are very active and can easily move from one area in a building to another. You must control cockroaches throughout a building to have successful control.

To have successful long term cockroach control, do the following:

  • Reduce moisture levels by keeping bathroom and kitchen cupboards dry and clean.
  • Store food and garbage in containers with tight fitting lids.
  • Paint and caulk to reduce the number of cracks and crevices.
  • Check cockroach activity by placing traps in areas where cockroaches travel.

There are many products available for controlling cockroaches. Products considered environmentally friendly include Silica Aerogel, Diatomaceous earth or boric acid powder. You can dust these products into areas where you find cockroaches.

Other products include Permethrin and Propoxur. Follow label directions. All Pest Control products purchased and used must be registered with Health Canada and contain a Pest Control Product (P.C.P. or PCP) Number on their label.

How do I select an exterminator?

Due to the difficulty in successfully controlling cockroaches, many people hire exterminators. You should hire an exterminator that offers more than one visit in a package price. Repeat applications are necessary to successfully control cockroaches.


Last update: May 16, 2019
Contact Us
Bugline: 311
or 1-877-311-4WPG
Media inquiries: 204-986-6000
311@Winnipeg.ca

Administrative Office and Research Laboratory
1539 Waverley Street
Winnipeg MB R3T 4V7

Operations Base
3 Grey Street
Winnipeg MB R2L 1V2
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