How do I get rid of mosquitoes in my yard?

You get rid of yard mosquitoes mostly by taking away the water they breed in. Spraying kills the adults that happen to be flying that week. Removing standing water stops the next ones from hatching, and it costs nothing.

Why the water comes first

Mosquitoes need standing water to develop, and they can breed in a container as small as a bottle cap.^[1] Eggs hatch into larvae, the larvae turn into pupae, and only then does a biting adult fly off. Mosquitoes live in standing water for at least a week before they start flying.^[2] That gives you a simple rule: if you empty every container once a week, nothing in it has time to grow up.

Where to look

Walk the yard the day after a rain. Common sources include roof gutters, downspout extensions, artificial containers, old tires, bird baths, ornamental ponds, tarps on woodpiles and drainage ditches.^[2]

The places people miss are usually small and shaded: plant saucers, kids' toys, a wheelbarrow, a recycling bin with no drain holes, a sagging grill cover, the folds of a tarp. Aedes aegypti, one of the container-breeding mosquitoes, lays its eggs in water that holds decaying leaves or algae, in wide-mouthed containers, and prefers dark containers in the shade.^[5] Look under decks and behind sheds as well as in the open.

Tip out what you find. Throw away containers you do not need, and turn the rest upside down or put them under cover.

Water you want to keep

Rain barrels, bird baths and ornamental ponds are all places where mosquitoes can breed.^[3] You do not have to give them up:

• Bird baths, fountains and wading pools. Empty and change the water in bird baths, fountains, wading pools, rain barrels and potted plant trays at least once a week.^[5]
• Rain barrels and ponds. Use larvicide dunks made with Bti. Bti is a naturally occurring bacterium found in soils, and its toxins affect only the larvae of mosquitoes, black flies and fungus gnats.^[6] It can be used in flower pots, tires and bird baths, and in larger water such as ponds.^[6] Read the label first: Some Bti products are allowed on certain drinking water, such as cisterns, and others are not.^[6] A tight lid or fine screen over a rain barrel's opening also helps keep egg-laying females out.
• Garden ponds. Backyard garden ponds can be stocked with predatory fish that feed on mosquito larvae.^[4]
• Pools. Keep swimming pool water treated and circulating.^[5] A covered pool that collects rain on top of the cover needs that water pumped off.

Make the yard a worse place to rest

Adult mosquitoes spend the day out of the sun and wind. Mosquitoes prefer to rest in protected sites during the day, so removing tall weeds and overgrowth is part of integrated mosquito management.^[4] Keep grass mowed, cut back the weedy strip along the fence, thin dense shrubs near where you sit, and clear brush piles. A fan blowing across a porch or patio often helps keep them off you as well.

Protect yourself while numbers drop

Most mosquito species are active at night and are busiest at dusk and dawn, but the Asian tiger mosquito also bites during the day.^[1] So repellent is worth wearing for daytime yard work, not only at sunset. Use an EPA-registered insect repellent outdoors and follow the label.^[3] For children, the Virginia Department of Health says do not use insect repellent on babies under 2 months old, and never use oil of lemon eucalyptus or para-menthane-diol on children under 3.^[3]

Indoors, the fix is old-fashioned. Use screens on windows and doors and repair any holes or tears in them.^[3]

What about spraying?

A spray kills adult mosquitoes resting on the plants it hits, but it does nothing to the larvae still growing in a clogged gutter. In its table of household insects, Virginia Cooperative Extension's 2026 pest management guide discourages homeowner applications of mosquito control measures outdoors, because of concerns over water contamination and the impact on non-target animals.^[4] If weeks of water removal have not been enough, a licensed company is the better route. Read whether monthly mosquito treatments are worth it and whether spraying is safe for kids and pets before you sign up.

Your local government may help for free. The Fairfax County Health Department offers a free yard inspection to help find mosquito breeding sites and gives prevention tips, but it does not spray for nuisance mosquitoes.^[1] Call your own local health department to ask what it does where you live.

Stop and call a pro if

• Mosquitoes stay heavy after a few weeks of weekly water removal and you cannot find where they are coming from.
• The gutters that are holding water are on a second storey or a steep roofline. That is a job for a gutter cleaner, not a ladder you are unsure of; see how often gutters should be cleaned.
• Part of the yard stays soggy for days after every rain. That is a drainage problem; see who to call for a wet yard.
• The water is somewhere you cannot reach or fix, such as a neglected pool or a blocked ditch on a neighbor's land. Report it to your local health department.
• You want a pesticide applied to the yard. Hire a Virginia-licensed pest control business; see what licences pest control companies need.

For why some yards are worse than others, read why there are so many mosquitoes in your yard, and for the season-long routine see how to stop mosquitoes breeding around your house. Browse mosquito control services, find pest control around Blacksburg, or read more pest control answers.

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