Cockroach control Melbourne

Cockroach treatment in Melbourne typically costs between $150 and $320 for a standard residential treatment. A gel bait treatment for a small apartment starts from around $150. Larger homes, severe infestations, or combined gel bait and spray treatments cost more and are quoted after inspection. Most standard treatments are completed in a single visit, with a follow-up inspection recommended 3 to 4 weeks later for German cockroach infestations.

Surface sprays kill cockroaches they contact directly but don't reach the harborage zones where German cockroaches spend most of their time, inside appliance motors, behind tiles, and inside cabinet hinges. Repellent sprays also cause German cockroaches to retreat deeper into these zones and avoid treated areas, making the infestation harder to eliminate. Professional gel bait treatment targets these harborage zones directly: cockroaches eat the bait inside their hiding places and carry it back to others in the nest. This is the opposite approach to a surface spray and the reason it works when spraying alone does not.

The two most common are the German cockroach (Blattella germanica) small (12–15mm), tan with two dark stripes, almost entirely indoor and the American cockroach (Periplaneta americana) large (35–40mm), reddish-brown, found in subfloors, drains, and gardens. Treatment differs significantly: German cockroaches require gel bait inside harborage zones; American cockroaches require residual spray and entry point management. See the full species comparison above.

Yes. Cockroaches carry and spread pathogens including Salmonella typhimurium, E. coli, Pseudomonas aeruginosa, and Staphylococcus aureus across food preparation surfaces. Their droppings, shed skins, and saliva also contain allergens that are documented triggers for asthma attacks, particularly in children. A cockroach infestation in a kitchen is a genuine food safety hazard.

Gel bait treatment for German cockroaches typically shows a significant reduction in visible activity within 1 to 2 weeks. Visible numbers may briefly increase in the first few days as cockroaches are drawn to the bait, this is expected and a sign the treatment is working. Full elimination usually takes 3 to 4 weeks. American cockroach activity treated with residual spray typically reduces within a week as the perimeter barrier establishes.

For gel bait-only treatment of German cockroaches, there is no requirement to vacate, bait is placed in small amounts inside crevices and appliance voids, not sprayed on open surfaces. For treatments that include a residual spray component, residents need to vacate treated rooms for 2 to 3 hours while the spray dries. Children and pets should stay clear of treated areas until surfaces are fully dry. Your technician will advise on re-entry timing for the specific treatment applied.