How much does millipede treatment cost in Brisbane?

Millipede treatment for a standard suburban property costs from $220, including perimeter barrier spray, garden bed treatment near the building, and entry-point exclusion advice. Properties with heavy garden mulch and high population pressure may benefit from a pre-autumn treatment in March-April before the first rain, and a reactive treatment immediately after a surge event. Ongoing seasonal programs cost from $180 per visit.

Portuguese Millipede · Autumn Surge · Perimeter Barrier

Millipede Control Brisbane

Q: Why do I suddenly have thousands of millipedes?

The Portuguese millipede (Ommatoiulus moreletus) congregates in large numbers in response to the first autumn rains, typically April-May in Brisbane. Cool, moist conditions after a dry period trigger mass movement. Populations that were living undisturbed in garden leaf litter begin moving en masse toward light sources and shelter, which often means the perimeter of buildings. A single autumn surge can involve thousands of millipedes entering a home over 2-3 nights.

Q: How do I stop millipedes getting inside?

Millipedes enter through any gap at ground level: door gaps, weep holes, plumbing penetrations, and subfloor vent covers. The most effective exclusion measure is fitting door sweeps to all external doors to eliminate the gap between the door bottom and the threshold. Sealing weep holes with weep hole covers (which allow drainage but block millipede entry) is also effective. Reducing garden mulch depth adjacent to the house perimeter removes the immediate harborage population.

Q: Are millipedes dangerous?

Millipedes are not venomous and do not bite. Some species secrete a defensive fluid that can irritate skin or stain surfaces yellow-brown. The fluid can cause temporary skin irritation if millipedes are handled. The primary concern is nuisance from large numbers entering the home and the staining from defensive secretions on light-coloured flooring. Dispose of indoor millipedes by sweeping or vacuuming rather than crushing.

Portuguese millipede invasions peak in April-May after the first autumn rains. Perimeter barrier spray, garden bed treatment, and door-gap exclusion stop the mass movement before it reaches indoor spaces. From $220.

0406 178 471 Get a Quote

At a Glance

Treatment costfrom $220

Peak seasonApril-May (autumn rain)

Seasonal programfrom $180/visit

Dangerous?No. Nuisance only.

Brisbane Millipede Species

Portuguese Millipede vs Native Millipedes

Most mass-invasion complaints in Brisbane are Portuguese millipedes. Native millipedes are present year-round but do not surge in the same way. The treatment approach is the same for both.

Portuguese Millipede

Ommatoiulus moreletus

Smooth, cylindrical, dark grey to black. 20-45mm. Introduced from Europe. Responsible for autumn mass-movement surges triggered by the first cool, moist conditions after a dry period. Populations build in garden mulch and leaf litter over summer and migrate en masse toward light and shelter in autumn. Can reach plague proportions in Brisbane suburbs with established garden mulch. Secretes a yellow-brown defensive fluid that stains surfaces and irritates skin.

Native Millipedes

Various Diplopoda species

Several native species found in Brisbane gardens, typically brown or reddish-brown and shorter (10-30mm). Live in soil, compost, and under garden debris year-round. Do not congregate in the same mass-movement surges as Portuguese millipedes. Generally beneficial as soil decomposers. Become a nuisance when present in large numbers around building perimeters or when entering homes. Treatment is the same as for Portuguese millipedes.

Why Brisbane Gets Autumn Millipede Surges

The Portuguese millipede's mass-movement trigger is the arrival of cool, moist conditions after a dry period. This matches Brisbane's weather pattern almost exactly: a hot, dry summer followed by the first significant autumn rainfall in April-May. Garden populations that have been building in undisturbed mulch all summer begin moving simultaneously, attracted by light sources and the warmth of buildings. A single property with heavy garden mulch can experience thousands of millipedes entering over 2-3 nights during a surge event.

April-May

Peak surge period in Brisbane

2-3 nights

Duration of a typical mass-movement event

Mulch depth

Primary garden factor driving population size

Treatment Approach

Millipede Treatment Process

Treatment targets the perimeter barrier to intercept millipedes before they reach the building, the garden zone adjacent to the house where populations are highest, and any entry points at ground level.

Perimeter barrier spray

Residual insecticide applied to the full building perimeter at ground level and 300mm up the wall face. Millipedes crossing the treated band contact the spray before reaching door thresholds or wall penetrations. Applied before and immediately after a surge event. Effective for 6-8 weeks under dry conditions, reduced by rain.

Garden bed treatment adjacent to the building

Garden beds within 2 metres of the building are treated with granular or spray insecticide to reduce the millipede population in the immediate harborage zone. Reducing mulch depth to under 50mm in these areas removes the primary breeding habitat near the building.

Entry-point exclusion advice

All ground-level entry points identified: door gaps, weep holes, plumbing penetrations, and subfloor vent covers. Door sweeps fitted to external doors eliminate the most common indoor entry point. Weep hole covers block millipede entry while maintaining drainage. These physical measures stop millipedes that cross the treated barrier before it can act.

Pricing

Millipede Treatment Cost Brisbane

Single treatment covers perimeter barrier, garden bed spray, and exclusion advice. Pre-autumn treatment in March-April plus a reactive post-surge treatment provides the most effective annual protection.

Single Treatment

from $220

Perimeter barrier, garden bed spray, exclusion advice. Standard suburban property.

Seasonal Program

from $180/visit

Pre-autumn barrier (March-April) plus reactive surge treatment. Two-visit program for high-pressure properties.

FAQ

Millipede FAQ

Why do I suddenly have thousands of millipedes?

This is the Portuguese millipede autumn surge. The first cool, moist conditions after Brisbane's dry summer trigger mass movement in April-May. Populations that built up in garden mulch over summer begin moving simultaneously toward light and building warmth. A surge can involve thousands of millipedes over 2-3 nights from a single property's garden.

How do I stop millipedes getting inside?

Fit door sweeps to all external doors. Replace or fit weep hole covers. Seal plumbing penetrations at ground level. These physical measures stop millipedes that cross the treated perimeter before the spray has had time to act. Reducing mulch depth adjacent to the house also reduces the population pressure.

Are millipedes dangerous?

No. Millipedes do not bite or sting. Some species secrete a yellow-brown defensive fluid that can cause temporary skin irritation and stain light-coloured surfaces. Sweep or vacuum indoor millipedes rather than crushing them to avoid staining. The nuisance is the numbers, not the individual animal.

When should I book treatment to prevent the autumn surge?

Book a pre-treatment in March-April, before the first autumn rains. The perimeter barrier needs to be in place before the millipedes start moving. A treatment booked after a surge has begun is reactive and reduces ongoing entry, but a pre-surge barrier is significantly more effective. Call 0406 178 471 in March to schedule ahead of the season.

All Brisbane pests

Millipede Control. Autumn Surge Specialists. Brisbane-Wide.

Perimeter Barrier · Garden Treatment · from $220

0406 178 471 Get a Quote