The treatment method a pest control company proposes should be determined by the pest species, the extent of the infestation, the location of the problem, and the presence of sensitive occupants — children, pets, pregnant women, or people with respiratory conditions. A professional company matches the method to the situation. One that applies the same product to every job regardless of these variables is not doing professional pest management.

“The question I wish every homeowner asked is: what is the least toxic effective option for this specific pest in this specific location? Because that’s the question a properly trained pest control professional is asking internally. If a company can’t answer it — if they always do the same treatment regardless of what they find — they’re not practicing integrated pest management. They’re selling a spray service.”

— Renata Voss, licensed exterminator and integrated pest management specialist with 14 years of experience in residential and commercial pest control in the local area

Questions About Chemical Treatments

Industrial worker in protective gear handling chemicals in a warehouse environment.

What specific pesticide product will be applied?

Ask for the product name, active ingredient, and Health your country Pest Management Regulatory Agency (PMRA) registration number. All pesticides used legally must be registered with Health your country. You can verify registration at the Health your country pesticide registry.

Write down the product name and look up the product label online — labels are legally required to be followed exactly during application.

What a good answer looks like: A specific product name and registration number, provided without hesitation.

What is the re-entry interval after treatment?

Pest control specialist using a smoke machine to fumigate outside a house.

The re-entry interval (REI) is the minimum time before humans and pets can safely re-enter treated areas. This varies by product and application method. Ask specifically:

  • How long before children can return to treated areas?
  • How long before pets can return?
  • Are there any surfaces (floors, countertops) that need to be avoided or cleaned before use?

What a good answer looks like: A specific re-entry interval tied to the actual product being used, not a generic estimate.

What precautions should I take before and during treatment?

For chemical treatments, you may be asked to:
– Remove or cover food, dishes, and food preparation surfaces
– Remove or cover pet food and water bowls
– Vacate the premises during application and for a specified period after
– Ventilate treated areas after re-entry

Ask specifically what preparation is required for the type of treatment being applied.

What is the application method?

Different application methods have different implications for exposure:

Spray (liquid application): Applied with a pump sprayer to surfaces, cracks, and voids. Effective for many insects. Can drift in air if not applied carefully.

Gel bait: A gel-format pesticide applied in small amounts to targeted locations (behind appliances, in cabinet corners). Very low exposure risk. The preferred method for cockroach control.

Dust: Applied in wall voids, electrical boxes, and other void spaces. Low exposure risk when properly applied in enclosed spaces.

Fumigation: Sealing the structure and applying gas fumigant. Used for severe infestations (drywood termites). Requires full evacuation for several days.

Heat treatment: Raising the temperature of the space above the lethal threshold for the target pest (typically 50°C+). Chemical-free. Used for bed bugs. Requires thorough preparation.

Ask what application method is proposed and why it’s appropriate for your specific situation.

Questions About Non-Chemical Methods

Are non-chemical methods available for this pest?

For some pests and situations, non-chemical methods are the preferred approach:

Heat treatment: Effective for bed bugs. Kills all life stages including eggs without chemical residue.

Exclusion: Physical sealing of entry points. The most effective long-term solution for rodent control. Not chemical at all.

Trapping: Live or kill traps for rodents and some wildlife. Chemical-free.

Pheromone traps: Used for monitoring insect populations and in some cases as a direct control method.

Diatomaceous earth: A non-toxic powder that damages the exoskeleton of crawling insects on contact. Low risk to humans and pets.

Ask whether any of these methods are appropriate for your specific pest situation before defaulting to chemical treatment.

Is the proposed treatment appropriate given the presence of children, pets, or sensitive individuals?

Tell the company about any sensitive occupants before treatment is proposed. Ask specifically whether the proposed treatment method and product are appropriate given those occupants, and whether alternative lower-toxicity methods are available.

What a good answer looks like: A modified treatment plan or method recommendation that specifically accounts for sensitive occupants.

Questions About Pesticide Regulations in many regions

Are the products being used compliant with your region’s cosmetic pesticide restrictions?

Your region’s pesticide regulations restricts the use of certain pesticides for cosmetic purposes (lawn care and landscaping) but permits pesticide use for structural pest control, which is what residential pest control involves. However, there are still restrictions on which products can be used. Ask the company to confirm their products are compliant with current your region pesticide regulations.

Will you provide a record of what was applied?

Licensed pest control companies in many regions are required to maintain records of pesticide applications. Ask for a written record of what product was applied, where, at what concentration, and on what date. This documentation is yours to keep.

Questions About Treatment Frequency

How many visits are required for effective treatment?

Many pest treatments require multiple visits to be effective:

Cockroaches: Typically 2–3 treatments at 2-week intervals, because eggs hatch after initial treatment and the emerging nymphs must be treated.

Bed bugs (chemical): Typically 2–3 treatments at 2-week intervals for the same reason.

Mice/rats: Ongoing monitoring and bait station management, typically with return visits every 2–4 weeks until the population is eliminated and exclusion is complete.

Ants: Often a single targeted treatment is effective, but some species (particularly carpenter ants) may require multiple treatments and must-address nest location.

Ask specifically how many visits are required for your specific pest situation and what the interval between visits is.

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