Mosquito control: reduction, not elimination

What is mosquito control?

Mosquito control for a residential yard is a seasonal programme: a technician treats the shaded vegetation and resting harbourage where adult mosquitoes shelter during the day, treats or removes standing water where larvae develop, and returns every few weeks through the season. It reduces the population using your yard - it does not eliminate mosquitoes, because they breed in water that may not be on your property and fly in from beyond it.

Signs you need mosquito control

• You cannot use your own garden between late afternoon and dusk during the season
• Bites happen in the shaded parts of the yard - under decks, in dense shrubs, along a fence line - rather than in open sun
• You have standing water you cannot remove: a low corner that holds after rain, a drainage ditch, a pond, a clogged gutter run
• The problem is worse after every rainfall, on a few days' delay
• You have a wooded or creek-adjacent lot line, or a neighbouring property with untended water
• Outdoor events, a pool, or small children make the yard genuinely unusable rather than just unpleasant
• Repellent candles, citronella and clip-on devices are not making a difference where you actually sit

Seeing something not on this list? Browse pest control problems by symptom →

How mosquito control actually works

1. 1

   A source survey of the whole property

   The technician looks for water that holds long enough for larvae to develop - gutters, plant saucers, tarps, buckets, wheelbarrows, tyres, the boat cover, corrugated drainage pipe, tree holes, bird baths, and the low spot behind the shed. Very small volumes count.

   Watch forA first visit that goes straight to spraying. If nobody walked the property looking for water, the most effective part of the service was skipped.

2. 2

   Source reduction, and larval treatment where water must stay

   Removable water gets tipped and the container turned over. Water that has to remain - a pond, a rain barrel, a drainage feature - is treated with a larvicide rather than emptied.

   Watch forSources on a neighbouring property. Your technician cannot treat them, and they may be the actual origin. This is worth knowing early, because it caps what you can buy.

3. 3

   Barrier treatment of resting harbourage

   Adult mosquitoes spend the day resting in cool, shaded, humid vegetation - the underside of leaves, dense shrub interiors, ivy, under decks and along fence bases. That is what gets treated, not the lawn.

   Watch forA technician treating open lawn and flowering plants. The lawn is not where they rest, and flowering plants in bloom are where pollinators are. Ask how blooms are handled.

4. 4

   Re-treatment on a seasonal cycle

   Barrier treatments degrade with sun, rain and new plant growth, so the service is re-applied on a rotation through the mosquito season and paused outside it.

   Watch forHeavy rain shortly after a treatment. Ask up front what the policy is on re-treating after a washout, because it will happen at least once a season.

5. 5

   Optional installed systems

   Some properties are offered a fixed misting system on a timer. It is a much larger commitment with its own maintenance and refill schedule, and it is a materially different purchase from a seasonal service.

   Watch forAutomated systems applying on a timer regardless of whether mosquitoes are present. Consider whether that is the treatment approach you want before installing plumbing for it.

What does mosquito control cost?

Seasonal mosquito programmes are usually priced per treatment across a set number of visits through the season, scaled by lot size and how much shaded vegetation there is. Single-event treatments before a party are priced separately. The Cost Guide covers how season length and acreage move the number.

See the full mosquito control cost guide - by material, size and region →

If the number is the problem, here are the ways people pay for it →