Cockroach Species in the GTA

German Cockroach (Blattella germanica): The most common and problematic species in Canada. Small (12–15mm), tan to light brown with two dark parallel stripes. Unlike other species, German cockroaches almost never live outdoors — they exist exclusively in human structures. Found in kitchens, bathrooms, behind refrigerators and stoves, inside microwaves, and under dishwashers. A single female and her descendants can produce 30,000 offspring in one year.

American Cockroach (Periplaneta americana): Much larger (35–40mm), reddish-brown. Often called a “water bug.” Enters homes from sewer systems, floor drains, and exterior cracks. Prefers warm, moist environments: basements, boiler rooms, around floor drains.

Signs of a cockroach infestation

Live cockroaches visible during daylight — a sign of heavy infestation since cockroaches are nocturnal and avoid light
Small dark pepper-like droppings along cabinet bases, behind appliances, and in corners
Egg cases (oothecae) — brown capsule-shaped casings about 8–10mm found in sheltered areas
Musty, oily odour in heavily infested spaces
Dark smear marks along walls and surfaces where cockroaches travel regularly

Why Cockroaches Are a Serious Problem

Health risks: Cockroaches carry and transmit Salmonella, E. coli, Staphylococcus, Listeria, and numerous parasites. They contaminate food surfaces, utensils, and stored food. Cockroach allergens from shed skins, droppings, and body parts are the second most common indoor allergen after dust mites in urban environments — a major asthma trigger, particularly in children.

Extraordinary reproductive rate: German cockroaches reproduce faster than any other common Canadian household pest. A single breeding pair in ideal conditions can establish a population of thousands within months. By the time you see cockroaches in daylight, the infestation is already advanced.

Why DIY Cockroach Control Almost Always Fails

Consumer sprays trigger resistance and scatter. German cockroaches in the GTA have well-documented resistance to pyrethroid sprays. Spraying causes avoidance behaviour, spreading the infestation to new areas.
Consumer bait products are largely ineffective. Professional gel baits use formulations and active ingredients not available in consumer products. Many consumer baits have palatability and resistance issues.
You cannot reach where they live. Cockroaches in appliance motor housings, inside wall voids, and deep in cabinetry joints are inaccessible to consumer spray application. Professional crack-and-crevice tools place product exactly where cockroaches harbour.
No follow-up means re-infestation. Eggs hatched after the first treatment produce a new generation in 3–4 weeks. Without a properly timed follow-up, the population rebuilds quickly.

How AstraHive Treats Cockroach Infestations — Step by Step

Inspection — detailed assessment of all harborage sites: kitchen cabinetry, appliances, bathroom vanities, laundry areas. We identify the infestation level and species to determine the correct protocol.
Preparation briefing — we provide specific instructions: remove items from under sinks, clean grease from stove surfaces, empty lower kitchen cabinets. Preparation dramatically improves treatment effectiveness.
Professional gel bait application — small precise amounts of professional-grade cockroach gel bait at all harborage zones: inside cabinet hinges, along the back of cabinet shelves, behind appliances, around the base of toilet. Workers feed on the bait, return to harborage, and spread the toxicant to other colony members.
Crack-and-crevice non-repellent insecticide — applied behind baseboards, under cabinetry, around pipe penetrations. Non-repellent formulations are carried back to the harborage rather than causing scatter.
IGR application (where warranted) — insect growth regulator prevents nymphs from developing to reproductive adults, breaking the breeding cycle.
Follow-up treatment at 3–4 weeks — essential. Addresses nymphs that hatched from eggs after the first visit. Completing this visit is critical for full elimination.

What to Expect After Treatment

You may see increased cockroach activity for 2–3 days as they are flushed from harborage sites — this is normal.
Activity should decrease significantly within 1–2 weeks.
Do not spray consumer insecticides over gel bait — this contaminates the bait and compromises the treatment.
The follow-up visit is not optional — eggs not yet hatched at the first visit will hatch within 3–4 weeks. The follow-up addresses this generation before they reach reproductive age.

Frequently Asked Questions

How much does cockroach extermination cost in the GTA?

Cockroach extermination typically ranges $200–$350 for a residential unit with two visits included. Severe infestations, multi-unit buildings, or commercial kitchens may be quoted differently. Call 905-925-8427 for a free consultation.

Does having cockroaches mean my home is dirty?

Not necessarily. German cockroaches commonly arrive in grocery bags, cardboard boxes, used appliances, and through shared walls in multi-unit buildings. Even meticulously clean homes develop infestations. The important thing is to treat promptly.

How long does cockroach treatment take to work?

Significant reduction in activity within 1–2 weeks. Full elimination typically takes 2–4 weeks with a complete program including the follow-up visit. Severe infestations may require additional visits.

Do I need to leave home during treatment?

Gel bait treatments require no evacuation. If crack-and-crevice spray is also applied, we may ask you to vacate the kitchen for 2–4 hours. We advise you specifically at the time of treatment.

Can cockroaches spread between apartments?

Yes — German cockroaches readily move between units through shared wall voids, plumbing chases, and gaps around pipes. In multi-unit buildings, a whole-floor or whole-building treatment approach is often necessary for lasting results. We coordinate with property managers for building-wide programs.

Cockroach Control GTA — Cockroach Exterminator Toronto | AstraHive