Although often discreet, cockroaches pose major challenges in our homes and generally require an exterminator. Facing an infestation of German cockroaches, brown-banded cockroaches, Oriental cockroaches, or American cockroaches, it is crucial to understand the behavior of these pests to adopt the best cockroach treatment strategies. On this page, you will find practical advice from an exterminator and professional approaches adapted to each type of cockroach, ranging from simple preventive measures to specialized extermination interventions. At Gestion Parasitaire du Québec, we are determined to ensure a healthy and pest-free environment. Our commitment is to provide you with effective and lasting solutions, whether you are looking to resolve an existing problem or to implement preventive measures. Trust our expertise for effective and responsible pest management.

Guide for the size of cockroaches, American, German, Oriental and Brown-Banded


Cockroaches are common pests but differ according to species. Among the most widespread, there are German cockroaches, brown-banded, Oriental, and American. Each of these species has unique characteristics that influence their behavior and the environment in which they thrive. German cockroaches are the most common type in Quebec and Montreal and prefer warm and humid places in the house. Brown-banded cockroaches are also present in Quebec and adapt to slightly drier places, like electronic equipment. Oriental and American cockroaches are less common in northern countries.


  • Description: Medium-sized with two lighter brown bands on the wings. Size: About 1.1 to 1.5 cm.
  • Color: Dark brown.
  • Behavior: Less dependent on humidity than German cockroaches. Tend to hide in high places like cabinets.
  • Environment: Adapted to both humid and slightly dry areas, including offices with electronic equipment.


  • Description : De taille moyenne avec deux bandes brunes plus claires sur les ailes.
  • Taille : Environ 1,1 à 1,5 cm.
  • Couleur : Brun foncé.
  • Comportement : Moins dépendantes de l’humidité que les blattes germaniques. Tendent à se cacher dans des endroits hauts comme les armoires.
  • Environnement : Adaptées aux zones humides et légèrement sèches, y compris les bureaux avec du matériel électronique.


  • Description: Large and oval-shaped. Size: Up to 2.5 cm.
  • Color: Dark brown to black.
  • Behavior: Mainly active at night, prefer to stay hidden in cool and dark places.
  • Environment: Frequent basements, sewers, and drainage areas.


  • Description: The largest among these species. Size: Can reach up to 4 cm.
  • Color: Reddish-brown.
  • Behavior: Fly short distances, mainly active at night. Move quickly in case of disturbance.
  • Environment: Prefer warm and humid areas like sewers, basements, and around water pipes.


Cockroaches, especially German cockroaches, are among the most resilient and widespread pests in homes and businesses. Their ability to reproduce quickly and adapt to various environments makes their extermination a significant challenge. This is why the intervention of a professional exterminator is often essential for effectively managing these infestations. A professional not only has the expertise needed to correctly identify the cockroach species and understand its behavior but also has access to advanced treatment methods and specific insecticides that are more effective. This section will detail preventive approaches and extermination methods.


To prevent an infestation of German cockroaches, adopting a proactive approach is essential. The following methods can help reduce the risk of infestation and maintain a clean and safe environment.

Inspection of Articles Before Introduction

To prevent the introduction of cockroaches into your space, a thorough inspection of items is essential. Before bringing items such as storage boxes, grocery bags, or second-hand furniture into your home or workplace, examine them carefully. Look for signs of cockroach presence, such as eggs or droppings, and ensure these items are free of pests.

Maintain Rigorous Hygiene

While hygiene is not the direct cause of a cockroach infestation, a clean environment can greatly help prevent their proliferation. Regular cleaning of floors, countertops, and hidden areas is crucial. It is important to understand that even with impeccable hygiene, an infestation can occur, but a clean environment can limit the growth of the cockroach population and increase the effectiveness of treatments.

Waste Management

Effective waste management plays a key role in preventing German cockroach infestations. Ensure regular disposal of garbage, particularly food waste that can attract these pests. Use trash bins with tight-fitting lids and ensure they are well sealed, both inside and outside your property.

Manage Moisture Levels

German cockroaches are attracted to humid areas, so managing the moisture level in your environment is crucial. Repair water leaks from faucets, pipes, and appliances as soon as possible. Keep areas such as basements, bathrooms, and kitchens as dry as possible, as moisture can create a favorable habitat for cockroaches.

Implementing these preventive measures can significantly reduce the risk of German cockroach infestation. However, if you suspect an infestation, it is advisable to contact a professional for appropriate treatment.


In the fight against German cockroaches, the intervention of a professional exterminator is often indispensable. These pests, known for their ability to reproduce quickly and adapt to various environments, require an expert approach for effective extermination.

Identification and Inspection

The exterminator begins with precise identification of the cockroach species, which is crucial for determining the appropriate treatment strategy. Then, a thorough inspection of the property is conducted to locate infestation areas, potential sources of food, water, and cockroach entry points. This step helps understand the extent of the infestation and identify critical areas requiring treatment.

Treatment Planning

Based on the inspection results, the exterminator develops a customized treatment plan. This plan includes advice on necessary environmental modifications and preventive measures to avoid reinfestations. The strategy takes into account the size and severity of the infestation, as well as the specifics of the infested location.

Application of Treatments

The exterminator uses specific treatments, including Seclira WSG insecticide, an effective and proven product. The focus is on applying this insecticide in cracks, crevices, and other cockroach hiding spots, minimizing their exposure to humans and pets. In addition to insecticides, sticky traps with attractants are installed to monitor and assess the level of infestation during follow-up visits.

Follow-Up and Evaluation

After the initial treatment, the exterminator conducts regular follow-up visits to evaluate the effectiveness of the treatment and adjust the strategy if necessary. These evaluations ensure that the infestation is under control and take corrective measures in case of persistent signs of cockroach presence.

Detailed Reports

At each stage of the process, detailed reports are provided. These reports include information on the treatments applied, observations made during inspections, and recommendations to maintain a healthy and cockroach-free environment. These documents serve as a reference for future actions and ensure complete transparency between the exterminator and the client.

The methodical and professional approach of an exterminator in treating German cockroaches not only guarantees the effective eradication of the infestation but also the prevention of future invasions.


Brown-banded cockroaches, though less known than other cockroach species, pose a serious infestation problem. Their ability to survive in less humid environments, such as those found in homes and commercial buildings, makes their extermination complex. Moreover, they can hide in hard-to-reach places, often necessitating the intervention of a professional. A qualified exterminator has the necessary expertise to correctly identify the species, understand its behavior and habitat, and apply the most effective and safe treatment methods.


Prevention is a crucial element in combating brown-banded cockroach infestations. Although these pests can be introduced in various situations, certain preventive practices can significantly reduce the risk of infestation. Here are some effective measures:

Inspection of Incoming Products

Carefully inspect all items entering your space, including imported products. Brown-banded cockroaches can hide in boxes, furniture, and even some appliances. This step is crucial to prevent the accidental introduction of these insects.

Hygiene and Cleanliness

A clean environment is essential to limit the proliferation of cockroaches. Although hygiene is not the direct cause of infestations, regular maintenance of food storage areas, kitchens, and other areas likely to attract cockroaches can improve the effectiveness of treatments and prevent their population increase.

Optimal Waste Management

Proper waste management is essential. Make sure to regularly dispose of garbage, particularly food waste, and use well-sealed trash bins to prevent attracting cockroaches.

Communication with the Property Owner

In case of signs of infestation in residential or commercial buildings, immediately inform the owner or administration. Prompt intervention can be decisive in preventing the spread of cockroaches to other units or common areas.


To effectively combat brown-banded cockroaches, a professional and methodical approach is indispensable. This section details the key steps an exterminator follows to treat these pests, highlighting the importance of precise identification, thorough inspection, and targeted application of treatments.

Identification and Inspection

The first crucial step in treating brown-banded cockroaches is precise species identification and a thorough inspection of the premises. The exterminator examines suspected areas to assess the extent of the infestation, focusing on both humid and dry areas, as unlike German cockroaches, brown-banded cockroaches can thrive in both environments.

Treatment Planning

After inspection, a treatment plan is developed. This plan is tailored to the specifics of the infestation, taking into account the presence of cockroaches in both humid and dry areas. Customized recommendations are also provided to prevent future reinfestations.

Application of Treatments

The exterminator uses Seclira WSG insecticide, applied carefully in cracks and crevices, the preferred hiding spots of brown-banded cockroaches. This method targets the cockroach hideouts specifically without contaminating exposed surfaces. In addition to insecticide, sticky traps with attractants are used to monitor the infestation. Unlike treatments for German cockroaches, special attention is paid to dry areas, in addition to humid areas, as brown-banded cockroaches can be present in both types of environments.

Follow-Up and Evaluation

Follow-up visits are scheduled to evaluate the effectiveness of the treatment. These visits allow for adjustments to the treatment if necessary and ensure that all infested areas, whether humid or dry, are effectively treated.

Detailed Reports

At each stage of the treatment, the exterminator provides detailed reports, documenting the methods used, observations made, and progress achieved. These reports help to track the evolution of the infestation and plan future preventive actions.

This methodical approach ensures comprehensive treatment of brown-banded cockroaches, taking into account their varied habitats and unique behavior.


In rental buildings, managing cockroach infestations presents a unique challenge. The key to success lies in effective communication between tenants and building management. The speed at which tenants report problems can greatly influence the ease of controlling the infestation. A quick and coordinated response is essential to prevent a situation from becoming more difficult to manage.


Tenants play a crucial role in early detection and effective management of cockroach infestations in rental buildings. Their active participation and cooperation are essential for successfully controlling and eliminating cockroaches. Here are some key aspects of tenants’ role:

  • Prompt Reporting: The first and most important step is to immediately report any signs of cockroach infestation to building management. Early reporting can greatly help in controlling the infestation before it spreads.
  • Avoid Commercial Repellent Products: It is crucial to inform tenants not to use sprays or commercial repellent products like knock-down insecticides. These products can actually drive cockroaches to other apartments, worsening the problem throughout the building.
  • Cooperation during Inspections: Tenants must cooperate with exterminators during inspections by allowing access to their apartment and providing useful information on cockroach activity observations.
  • Preparation for Treatment: Before any treatment application, tenants often need to prepare their apartment. This may include cleaning infested areas, moving furniture to allow access to hidden areas, and securing food and kitchen utensils.
  • Following Recommendations: Following all recommendations given by pest control professionals, such as eliminating food and water sources for cockroaches, is essential to prevent reinfestation.
  • Ongoing Communication: Maintaining open communication with building management and pest control professionals throughout the treatment and prevention process is crucial for effective infestation management.


Inspection is a crucial step in managing cockroach infestations in rental buildings. It should be conducted thoroughly and strategically to identify affected areas and assess the extent of the infestation. Here are key aspects of this phase:

  • Targeted Areas: Exterminators focus their inspections on key areas where cockroaches are likely to hide or breed. This includes pantries, kitchen cabinets, spaces under sinks, and behind and under appliances like stoves, refrigerators, microwaves, toasters, and garbage chutes. Bathrooms are also important places to inspect, especially around pipes and humid areas.
  • Installation of Sticky Traps: Sticky traps with attractants are often used to capture cockroaches and assess the level of activity. These traps help determine the extent of the infestation and the most problematic areas.
  • Inspection of Adjacent Apartments: If cockroaches are detected in one apartment, it is crucial to also inspect neighboring apartments and those in the same vertical column. Cockroaches can easily move between units, so this step is necessary to prevent the spread of the infestation to other parts of the building.
  • Evaluation of Entry Points: The inspection also includes searching for potential cockroach entry points into apartments. This may include cracks in walls, openings around pipes, and spaces under doors.
  • Inspection Report: After the inspection, a detailed report is compiled, describing affected areas, the extent of the infestation, and recommendations for the next steps in treatment.


Once the inspection is completed, a treatment plan is developed in close collaboration with building management. This plan must be designed to effectively treat the infestation while minimizing disruptions for tenants. Key elements of the plan include:

  • Strategic Planning: Determining the apartments to be treated as a priority, based on the inspection and tenant reports.
  • Coordination with Tenants: Informing tenants of the dates and times of treatments, as well as necessary preparations in their apartments.
  • Preventive Recommendations: Providing advice on preventive measures that tenants can take to reduce the risk of reinfestation.


The application of treatment is a crucial step that requires particular attention to safety and effectiveness. Important aspects include:

  • Targeted Treatment: Application of treatments in areas identified as infested during the inspection. This may include the use of gels, sprays, and other methods suited to different apartment spaces.
  • Use of Non-Repellent Pesticides: To avoid dispersing cockroaches to other parts of the building, the use of non-repellent pesticides is favored. These products eliminate cockroaches without driving them to new territories.
  • Treatment of Adjacent Apartments: In addition to treating infested units, it is often recommended to apply preventive treatment around the perimeter of neighboring apartments to prevent the spread of the infestation.
  • Safety and Compliance: Ensuring that all treatments are carried out in compliance with safety standards and regulations, especially in residential environments.

The combination of a well-designed treatment plan and careful application not only ensures the eradication of cockroaches but also minimizes risks to tenants. Cooperation and communication between tenants, building management, and pest control professionals are essential throughout this process to ensure effective treatment and prevent future infestations.


Post-Treatment Follow-Up

  • Regular Evaluations: Follow-up visits are essential after the application of treatment. These visits allow for assessing the effectiveness of the treatment and detecting any signs of reinfestation.
  • Treatment Adjustments: If necessary, adjustments are made to the initial treatment plan, based on the results observed during follow-ups.
  • Continuous Trap Installations: Sticky traps can be left in place to continue monitoring cockroach activity.

Collaboration between All Parties

  • Active Role of Tenants: Tenants are encouraged to remain vigilant and immediately report any signs of cockroaches after treatment.
  • Involvement of Building Management: Building management plays a central role in coordinating efforts and communicating relevant information between tenants and the pest control team.

Effective Communication

  • Regular Updates: Regular updates are provided to tenants and building management, keeping everyone informed of the progress of the treatment and ongoing preventive measures.
  • Awareness and Education: Information sessions can be organized to educate tenants on best practices for preventing cockroach infestations.


  • Inspection and Treatment Reports: Detailed reports are provided after each inspection and treatment, documenting treated areas, methods used, and observed results.
  • Tracking Progress: These reports allow for tracking the evolution of the infestation over time and adapting treatment and prevention strategies accordingly.
  • Accessibility of Reports: Reports are made accessible to building management and, if appropriate, to tenants, ensuring transparency in the process.
  • Summary of Undertaken Actions: They provide a complete overview of the actions undertaken, facilitating accountability and evaluation of deployed strategies.

Follow-up, collaboration, communication, and detailed documentation are essential components of successful cockroach infestation management in a rental building. These elements ensure not only the effectiveness of the treatment but also the prevention of future infestations, creating an environment of trust and cooperation among all involved parties.

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