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Are monthly mosquito treatments worth it?

They can be, but only after you have removed the standing water mosquitoes breed in. A monthly spray knocks down adults resting in shrubs and shade for a while, yet many residential products do not last long and new mosquitoes keep hatching or flying in. They are most worth paying for when a yard you use often still has heavy biting after weeks of cleanup.

Free to ask. Local shops send quotes, and you pay only when you book one.

By Kasra Taheri, Founder, LoclisPublished

Researched and drafted with AI, then checked claim by claim against the sources listed below before it was published. Prices and rules change; the dates beside each source say when it was last checked.

Step by step

Read when to stop and call a pro, further down this page, before you start.

  1. Step 1: Clear standing water first

    Spend a few weeks getting rid of standing water in rain gutters, tires, buckets, toys and other containers before you judge whether you need spraying.[2]

  2. Step 2: Note when and where you are bitten

    Keep a short record of the times of day and the parts of the yard where biting is worst, so a company can see what it is treating.

  3. Step 3: Ask your locality what it does

    Ask your local health department or mosquito control program what it already does in your area and what it recommends at home.[1]

  4. Step 4: Talk to several companies

    Talk with several licensed companies before choosing one, and get each estimate in writing.[5]

  5. Step 5: Ask about IPM and inspections

    Ask whether the company uses Integrated Pest Management and whether each visit includes looking for breeding water.[5]

  6. Step 6: Ask how it protects ponds and bees

    Ask which products it uses and how it keeps them off fish ponds, flowering plants and vegetable beds.[4]

  7. Step 7: Check the licence

    Confirm the company holds a Virginia pesticide business license and employs a certified commercial applicator.[6]

  8. Step 8: Keep the contract short

    Choose terms you can cancel, and review after the first visits whether biting has actually dropped.[5]

Monthly mosquito treatments are worth it for some yards and a waste of money for others. The deciding question is whether the mosquitoes are still there after you have dealt with the water they breed in. If they are, a licensed company can often make a yard you use every day more comfortable. If you have not cleared the water yet, start there; it is free and it works on the cause.

Rows of open wooden barrels filled to the brim with uncovered rainwater beside a downspout
Photo: Jan Tik, CC BY 2.0, via Wikimedia Commons

What a monthly treatment does

Most monthly plans spray the places adult mosquitoes rest. Virginia Cooperative Extension's 2026 pest management guide describes the approach: insecticides can be applied to the lower limbs of shade trees, shrubs and other shaded areas, such as under decks and along foundations.[3] The aim is to kill the mosquitoes resting there.

What it does not do is last. Many of the pesticides available for residential use may not last long, and mosquitoes that fly into a yard a few days after a treatment may be unaffected.[1] Meanwhile, eggs and larvae already in the water will emerge as adults over the next few weeks.[1] That is why the plans are monthly, and why a plan without water removal keeps treating the same problem.

Why water removal comes first

Treating the water is the cheaper fix. Egg and larva interventions are generally the most effective, least costly way to control mosquitoes.[2] Sprays have a place: CDC and EPA recognize a legitimate need for chemical control of adult mosquitoes under certain circumstances, especially during disease transmission or when source reduction and larval control have failed or are not feasible.[2]

For a homeowner, "failed or not feasible" is the test. If you have tipped out containers weekly, cleared gutters and treated rain barrels for a few weeks and biting is still heavy, a monthly plan starts to make sense. How to get rid of mosquitoes in your yard covers the cleanup.

When monthly treatments tend to be worth it

  • The source is next door. The mosquitoes that can carry Zika virus typically fly less than a quarter of a mile from the water where they grew up.[1] A quarter mile takes in a lot of neighbors' yards, ditches and storm drains you cannot fix.
  • You use the yard a lot. Daily outdoor time with children, a pool deck, a home business outdoors, or a garden you work in every evening.
  • The yard backs onto woods or wet ground. Shade and moisture along a wooded edge give adults places to rest that are hard to clear.

When they are probably not worth it

  • You have not dealt with the water. Spraying shrubs while a clogged gutter breeds new mosquitoes is paying for the same visit every month.
  • You keep bees, a fish pond or a pollinator garden. Pyrethrins and permethrin, the insecticides most often used in outdoor residential misting systems, are toxic to all insects and may kill beneficial insects such as honeybees, ladybugs and butterflies, and permethrin is very highly toxic to fish.[4] Ask what products a company uses before you sign.
  • The pitch is an automatic misting system. Outdoor residential misting systems have not yet been studied enough to document that they control mosquitoes, and they have not been shown to control or prevent the spread of West Nile virus.[4]
  • You only need one evening. A single treatment before an event costs less than a season.

Doing it yourself has its own drawbacks. 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.[3]

Questions to ask before you sign

The National Pesticide Information Center suggests these questions when choosing a company:

  • "Do they use Integrated Pest Management techniques?"[5] Ask whether each visit includes looking for breeding water.
  • "Are they willing to discuss low-toxicity options and reducing environmental risks?"[5]
  • "Does the company require you to sign up for a long-term contract? If so, what are the long-term costs?"[5]
  • What happens if mosquitoes come back between visits?

Get estimates from more than one company and compare their rates and services.[5] See what monthly mosquito control costs in Virginia for what drives the price.

Check the licence too. In Virginia, no one may apply or recommend a pesticide commercially without a pesticide business license and a certified commercial applicator on staff.[6] What licences pest control companies need in Virginia explains how to check one.

Stop and call a pro if

  • Biting stays heavy after a few weeks of weekly water removal.
  • Someone in the household is especially bothered by bites and the yard is used every day.
  • There is breeding water you cannot remove or treat, such as a wet ditch, a large pond or a neighbor's neglected pool. Report a neglected pool to your local health department as well.
  • You want pesticide applied for you. Use a licensed company, and if children or pets use the yard, read whether mosquito spraying is safe for kids and pets first.

Browse mosquito control services, find pest control around Blacksburg, or read more pest control answers. When you have decided, describe the job on Loclis and licensed businesses can quote it in writing.

Common questions

Do monthly mosquito sprays actually work?
They reduce the adults resting on the plants they reach, for a while. Many residential products do not last long, mosquitoes from nearby yards fly in afterwards, and new adults keep hatching from standing water. That is why a spray works best on top of water removal, not instead of it.
Is a misting system better than monthly visits?
EPA says outdoor residential misting systems have not been studied enough to show that they control mosquitoes, or that they prevent West Nile virus. Some run on a preset timer rather than when mosquitoes are actually biting. Compare one against targeted visits and water removal before you buy.
Will monthly spraying hurt bees or my fish pond?
It can. EPA notes that pyrethrins and permethrin are toxic to all insects, including honeybees and butterflies, and that permethrin is very highly toxic to fish. Ask the company how it keeps spray off flowering plants and away from ponds, and read about spraying safety around kids and pets.
Is a one-time treatment enough for a party or wedding?
For a single event, one treatment usually makes more sense than a season plan. Do a thorough round of water removal the week before, schedule the treatment close to the date, and ask the company how long the people and pets should stay off the treated area.
Can I just spray my own yard instead?
Virginia Cooperative Extension's 2026 guide discourages homeowner outdoor mosquito applications because of water contamination and harm to non-target animals. If water removal is not enough, a licensed company that targets resting sites and checks for breeding water is the safer choice.
How do I know if it is working?
Compare biting at the same times of day and in the same spots before and after the first visits. If there is no clear drop, ask the company to look again for breeding water, and use a contract you can cancel.

Sources

  1. [1] Do I need to spray for mosquitoes at home?, National Pesticide Information Center, Oregon State University and U.S. EPA. Checked October 27, 2026.
  2. [2] Success in Mosquito Control: An Integrated Approach, U.S. Environmental Protection Agency. Checked October 27, 2026.
  3. [3] 2026 Pest Management Guide: Home Grounds and Animals, Nuisance Insects of the House and Yard, Virginia Cooperative Extension, Virginia Tech. Checked October 27, 2026.
  4. [4] Mosquito Misting Systems, U.S. Environmental Protection Agency. Checked October 27, 2026.
  5. [5] Selecting a Pest Control Company, National Pesticide Information Center, Oregon State University and U.S. EPA. Checked October 27, 2026.
  6. [6] Code of Virginia § 3.2-3924. Annual business license required, Virginia General Assembly, Legislative Information System. Checked October 27, 2026.

Want a pro to handle it?

Describe the job once. Licensed local businesses send quotes, and you pay only when you book one.