Although small, ants can pose significant challenges in our homes and workplaces. Whether you’re dealing with an infestation of carpenter ants, pharaoh ants, or common ants, it’s essential to understand the nature of these intruders and the best methods to manage them effectively. Here, you will find practical advice and professional strategies tailored to each type of ant, ranging from simple prevention methods to targeted professional exterminator interventions. We understand the importance of a safe and pest-free environment, and our commitment is to offer you effective and lasting solutions. Whether you’re looking to treat an existing problem or take preventive measures, Gestion Parasitaire du Québec is your trusted partner for expert and responsible pest management.

Fourmis Charpentière sur bout de bois


Ants are among the most common and diverse creatures we encounter, but knowing how to distinguish between the different species can be crucial in determining the appropriate treatment. Carpenter ants, known for their ability to damage wood, differ significantly from pharaoh ants, often associated with populated establishments. On the other hand, little black ants and brown ants, though less destructive, can be a major nuisance in our homes. Also, there are pavement ants, known for their presence around driveways and patios. Each species has its own distinctive characteristics, such as size, color, behavior, and preferred environment, making them unique and requiring different methods of prevention and treatment.


Carpenter Ants
  • Description: Known for their relatively large size and ability to burrow into wood.
  • Size: Between 0.6 cm and 2.5 cm.
  • Color: Generally black, but some may have reddish hues.
  • Behavior: They create their nests in moist or rotten wood and can cause significant structural damage.
  • Environment: Prefer moist woods, often found in water-damaged wooden structures.


Pharao ants
  • Description: Small and tenacious, these ants are a major problem in hospitals and residences.
  • Size: About 2 mm.
  • Color: Light yellow to reddish-brown.
  • Behavior: Known for their ability to spread quickly and create multiple colonies.
  • Environment: Prefer warm and humid environments, often found in large buildings.


Little black ants
  • Description: As their name suggests, these ants are small and black in color.
  • Size: About 1.5 to 2 mm.
  • Color: Black.
  • Behavior: They form large colonies and can easily invade homes.
  • Environment: Often found inside and around residential structures.


Pavement ants
  • Description: Known for their proximity to driveways and patios, these ants are small and agile.
  • Size: About 2 to 3 mm.
  • Color: Varies from dark brown to black.
  • Behavior: They also form large colonies and can be a nuisance in homes.
  • Environment: Common around driveways, patios, and other paved surfaces.


Before starting any treatment against ants, it’s crucial to ensure that they are indeed common ants and not more problematic varieties like carpenter ants or pharaoh ants. These often require specific approaches due to their behavior and potential impact on structures. In case of doubt, it’s always better to consult a pest management expert for accurate identification and tailored advice.


Preventive measures play a crucial role in managing ant infestations. By adopting regular hygiene and maintenance practices, it’s possible to significantly reduce the risk of ant invasions in your home or business.

  • Rigorous Cleaning: Regular cleaning is essential to prevent ants from finding food sources. This includes wiping countertops, sweeping floors to remove crumbs, and immediately cleaning up any spilled sweet or sticky substances. It’s also important to clean under and behind large appliances where crumbs and other debris can accumulate.
  • Elimination of Food Sources: Storing food in airtight containers is a key step to avoid attracting ants. Ensure that food, including pet food, is properly stored and containers are tightly closed. Avoid leaving dirty dishes in the sink and regularly empty trash cans.
  • Waste Management: Proper waste management is essential. Use trash cans with lids that close tightly and empty them regularly. Also, ensure that waste storage areas are clean and free of food debris.
  • Elimination of Outdoor Ant Nests: Inspect the surroundings of your property for potential ant nests. Treating these nests can prevent ants from entering your home. Measures like pruning trees and bushes that touch your house and managing moisture and stagnant water areas can also be beneficial.
  • Monitoring and Maintenance: Conduct regular inspections to detect early signs of ant activity. Acting quickly can prevent a small infestation from becoming a larger problem.

Traitements Naturels contre les Fourmis

Natural treatments offer an ecological and often less toxic alternative to chemical pesticides for ant control. Here are some effective methods:

  • Vinegar: Vinegar is a natural repellent for ants. Mix an equal parts solution of white vinegar and water in a spray bottle. Use this solution to clean countertops, floors, windows, and other surfaces where ants are likely to walk. Vinegar deters ants by eliminating the trail pheromones they use for navigation.
  • Essential Oils: Certain essential oils, such as peppermint, lemon, eucalyptus, and clove, are known to repel ants. Mix a few drops of one of these oils with water in a spray bottle and apply the solution along baseboards, door thresholds, and other entry points. These oils can not only deter ants but also leave a pleasant scent in the house.
  • Diatomaceous Earth (DE): Diatomaceous earth is a natural insecticide that causes dehydration in ants upon contact. Sprinkle food-grade diatomaceous earth around entry areas, in cracks, near nests, or in other areas where you observe ant activity. Ensure that the area remains dry, as DE loses its effectiveness when wet.

Utilisation de Pesticides pour le Contrôle des Fourmis

When natural and preventive methods are not sufficient, the use of pesticides may be necessary to effectively control an ant infestation. Here are some guidelines and tips for safe and effective use of pesticides:

  • Selecting Appropriate Products: It’s important to choose pesticides specifically formulated for ants. Available products may include baits, sprays, powders, and gels. Each type has specific uses and benefits. Baits are particularly effective as they allow ants to carry the poison back to their nest, thus eliminating the colony at its source.
  • Read and Follow Instructions: Before using any pesticide, read the instructions on the label carefully. This will ensure not only effective use but also minimize health and environmental risks.
  • Safe Use: Always wear appropriate protective equipment, such as gloves and masks, when applying pesticides. Ensure that the area is well-ventilated and avoid eating, drinking, or smoking during use.
  • Targeted Application: Apply the pesticide in areas where ant activity is highest. This includes ant trails, entry points, near nests, and areas where ants are likely to seek food.
  • Safety for Children and Pets: Choose pesticides that are safe to use in environments with children and pets. Place baits and other products in areas inaccessible to them.
  • Storage and Disposal: Store pesticides in their original packaging, properly labeled, and out of reach of children and pets. Follow label instructions for proper disposal of unused pesticides or empty containers.


Identification of the Species

The professional treatment by an exterminator begins with a crucial step: ensuring the identity of the ant species. The expert determines whether the infestation is due to common ants rather than carpenter ants or pharaoh ants. This distinction is important for choosing the most effective treatment method.

Inspection and Evaluation

The expert then conducts a thorough inspection of the property. This detailed evaluation helps to identify the areas of ant activity, their food sources, and potential entry points. The goal is to fully understand the extent of the infestation to plan an appropriate treatment.

Customized Action Plan

Based on the inspection, the professional develops a targeted action plan to eliminate the common ant infestation. This plan may include specific baits, perimeter treatments, and various preventive measures. Each plan is tailored to the specific needs of the situation.

Outdoor Treatment

Professionals treat areas around the house, such as foundations, driveways, and gardens, where ants are likely to build their nests or find food sources. Specific baits and perimeter treatments are applied to create a protective barrier that prevents ants from entering the house.

Application of Indoor Treatments

Treatments are applied with precision and care. Professionals use safe methods, ensuring the protection of the residents of the house. The products used are chosen for their effectiveness while respecting safety and environmental standards.

Prevention and Maintenance Advice

After the treatment, personalized advice is provided to help keep the house ant-free in the future. These recommendations may include effective cleaning practices, tips for storing food, and strategies for sealing potential entry points.

Follow-Up as Needed

The expert remains available for return visits if needed. If signs of infestation reappear or if new problems arise, clients can easily contact the professional for additional intervention.

Complete Report

A detailed report is provided at the end of the intervention. This document summarizes all the actions taken, the results observed, and advice for preventing future infestations. This report serves to ensure transparency and to provide a useful reference for the client.


Carpenter ants pose a more serious problem than other ant species due to their ability to damage wooden structures. Unlike other ants that primarily seek food, carpenter ants burrow into wood to establish their nests, which can compromise the structural integrity of buildings. Therefore, their elimination requires a more strategic approach and often the intervention of a professional to avoid significant damage.


Prevention is key in the fight against carpenter ants. These measures aim to make the environment less attractive to these pests and reduce the risk of infestation.

Avoid Wood Near the House

It’s crucial not to store wood near the structure of your home. This includes firewood, construction debris, and piles of branches. Carpenter ants are attracted to wood, especially if it’s moist or rotten. Keep it stored at a safe distance from your home and elevated to avoid direct contact with the ground.

Moisture Management

Carpenter ants are attracted to moist environments. Ensure to repair water leaks, dripping pipes, and other sources of moisture around your home. Proper ventilation of spaces such as basements, attics, and crawl spaces is also essential to prevent moisture accumulation.

Watch for Signs of Carpenter Ants

Be vigilant for signs of a carpenter ant infestation, such as the presence of fine sawdust, holes in wood, or the detection of live ants. Early detection can help prevent significant structural damage.

Pruning Trees and Shrubs

Tree branches and shrubs touching your home can serve as a bridge for carpenter ants. Keep them well-trimmed and away from your home to prevent ants from finding an easy path to enter.

Cleaning Gutters and Downspouts

Regular maintenance of gutters and downspouts is important to prevent moisture problems that can attract carpenter ants. Ensure they are always clean and functioning properly to keep water away from your home.


When preventive methods are not sufficient to control a carpenter ant infestation, the use of pesticides may be necessary. Here are some guidelines for effective and safe use of pesticides:

Importance of Baits

The use of baits is often preferred as it has a direct impact on the entire colony. Ants carry the bait back to the nest, which helps to eliminate the queen and other ants. It’s crucial to follow instructions for the correct placement of baits and avoid disturbing the ants while they transport them.

Avoiding Spray or Powder Pesticides

In the treatment of carpenter ants, it’s advised to avoid using pesticides in spray or powder form, as they can disperse the colony without eliminating the nest, potentially worsening the infestation. The application of these pesticides is recommended only when the nest has been accurately located, and ideally, it should be performed by a professional. Pest management experts have the skills and equipment needed to apply these treatments in a targeted and safe manner, thus ensuring effective elimination of the nest and colony.

Safe Application

When using sprays or other forms of pesticides, it’s essential to respect the manufacturer’s instructions. Use personal protective equipment like gloves and masks, and ensure that the space is well-ventilated. Apply the pesticides in a targeted manner, avoiding areas where children and pets can access them.

Considérations Avant le Traitement Professionnel

If you are considering hiring a professional service for an advanced infestation, it’s recommended to avoid using sprays or powders. These products can disperse the colony and complicate the effectiveness of a subsequent professional treatment. Baits, on the other hand, are less likely to cause this type of problem.

By using pesticides thoughtfully and responsibly, you can increase the effectiveness of the treatment while minimizing health and environmental risks. Nevertheless, for significant infestations, the intervention of a professional remains the safest and most effective solution.


Species Identification

The professional intervention begins with accurate identification of the species. Specialists from Gestion Parasitaire du Québec distinguish carpenter ants from other types of ants to ensure that the treatment plan is tailored to this particular species.

Inspection and Evaluation

A detailed inspection of the property is carried out to assess the extent of the infestation. This step allows for locating the nests, determining the entry ways of the ants, and identifying factors that might contribute to the infestation, such as moisture sources or rotten wood.

Customized Action Plan

Based on this inspection, a specific action plan is developed. This plan includes targeted strategies to effectively eliminate the carpenter ant colony, while considering the particularities of each property.

Application of Treatments

Indoor treatment is primarily done using baits, such as Scorpio Ant Bait. Outdoors, treatments are applied to cut off ant highways and prevent their access to the structure.

Prevention and Maintenance Advice

Advice is provided to help prevent future infestations. These recommendations include hygiene measures, moisture management, and strategies to close potential ant entry points.

Post-Treatment Follow-Up

Follow-up visits are scheduled after the initial treatment. These visits ensure that the infestation has been completely eradicated and adjustments are made if necessary.

Complete Report

A detailed report is provided at the end of the treatment, including a summary of the actions taken, the results obtained, and recommendations for the future. This document serves as a reference for preventive measures and future treatments.

10-Year Guarantee

Gestion Parasitaire du Québec offers a 10-year guarantee on their work, testifying to their confidence in the effectiveness of their methods. This guarantee is conditioned upon the completion of an annual exterior treatment, essential for maintaining long-term effectiveness in controlling carpenter ants.

This professional and methodical approach not only ensures the elimination of carpenter ants but also peace of mind through a durable solution and a solid guarantee.


Pharaoh ants are considered a serious problem, mainly because of their unique behavior when threatened. When they feel attacked, these ants tend to multiply the number of queens and disperse their colonies, a phenomenon known as “budding.” This ability for fragmentation and rapid multiplication of colonies makes their eradication particularly difficult, especially in structures like apartment blocks where they can easily spread from one unit to another.


Rigorous and Regular Cleaning

The first line of defense against pharaoh ants is thorough and regular cleaning. These ants are attracted to food sources, so it is crucial to leave no food residue. Clean up crumbs and spills immediately, especially in the kitchen. Ensure to seal and store food properly, including pet foods.

Waste Management

Effective waste management is essential. Use trash cans with tightly closed lids and regularly dispose of garbage to avoid attracting ants. Compost and trash bins should be kept away from the exterior walls of the house or building.

Awareness in Collective Housing

In residential buildings, communication and awareness among residents are key. Inform them about the importance of maintaining strict hygiene and encourage them to report any suspicious ant activity. The cooperation of all residents is necessary to effectively prevent infestation.

Regular Monitoring

Regularly inspect your home or building and watch for signs of ant activity. This includes looking for ant trails, particularly in areas where food is stored or prepared. Early detection is crucial for quick intervention before the infestation spreads.


Choice and Application of Specific Baits

To effectively combat pharaoh ants, it is essential to choose baits specific to their biology. These baits contain active substances that are carried by the worker ants back to the nest, affecting the entire colony, including the queens. The application must be precise: baits should be placed on ant trails and in areas of high activity, without disturbing the natural movement of the ants to ensure their transport to the nest.

Avoid Sprays and Powders

Sprays and powder insecticides are not recommended for pharaoh ants as they can trigger a defense reaction known as “budding.” This reaction leads to the formation of new queens and the dispersion of the colony, which can worsen the infestation. The use of these methods can also interfere with the effectiveness of baits, as ants may avoid treated areas, making control more difficult.

Safety and Precautions

When using pesticides, it is important to follow the manufacturer’s instructions for safe application. Wear personal protective equipment and ensure that children and pets are not exposed to the baits. Baits should be placed in areas inaccessible to them.

Monitoring and Readjustment

After applying baits, regular monitoring is necessary to assess their effectiveness. It may be necessary to readjust the position of the baits or add new ones if ant activity persists. This step is essential to ensure that the treatment reaches the nest and effectively eliminates the colony.

Using these methods strategically and cautiously, you can increase the chances of success in controlling pharaoh ants. However, due to the complexity of their behavior and their ability to disperse rapidly, professional intervention is often the safest and most effective solution for managing a pharaoh ant infestation in a comprehensive and lasting way.


Species Identification

Professional intervention begins with accurate identification of the species. Pest management experts determine if the infestation is due to pharaoh ants, a species known for its unique behaviors and difficulty in control. This identification is essential to develop an effective and specific treatment plan.

Inspection and Evaluation

Professionals conduct a thorough inspection of the property, looking for signs of pharaoh ant activity, such as ant trails and nesting areas. They assess the extent of the infestation and identify contributing factors, such as food sources and entry points.

Customized Action Plan

Based on this inspection, a personalized action plan is developed. This plan takes into account the specifics of the infestation and the characteristics of the property to ensure an effective and lasting treatment.

Application of Treatments

The application of treatments focuses on the use of specific baits, such as Scorpio Liquid Ant Bait, to treat infestations inside buildings. Unlike other species, an exterior treatment is generally not necessary for pharaoh ants, and in fact, is discouraged, as it can lead to the dispersion of the colony.

Prevention and Maintenance Advice

After the treatment, professionals provide advice to prevent future infestations. These tips may include hygiene measures, strategies to eliminate food sources, and recommendations to keep the property in a state that discourages ant nesting.

Post-Treatment Follow-Up

Follow-up visits are planned for this type of treatment. These visits allow for checking the effectiveness of the treatment and ensuring that the infestation has been completely eradicated. They are also an opportunity to adjust the treatment plan if necessary.

Complete Report

A detailed report is provided after the treatment, summarizing the interventions carried out, the results obtained, and recommendations for the future. This report serves as documentation for the actions taken and as a reference for future preventive measures.

This comprehensive professional approach ensures effective treatment of pharaoh ants, taking into account their specific behaviors and providing lasting solutions to manage them.

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