Fire Ants and Mosquitoes in Central Florida

Control That Works and What to Skip

Fire ants and mosquitoes are the two pests that make a Central Florida yard hard to enjoy. Both are year-round problems here, both have a long list of home remedies that don’t work, and mosquitoes carry real disease risk. In 2026, locally acquired dengue cases led to targeted and aerial spraying in parts of Orange County.

Short version: For fire ants, UF/IFAS recommends a two-step method: spread a fresh bait over the whole yard once or twice a year when ants are actively foraging, then treat the few mounds that remain in high-traffic spots. Spraying foraging ants, shoveling mounds, and home remedies like grits or club soda don’t work. For mosquitoes, the most effective step is “drain and cover”: empty anything that holds water at least twice a week, keep screens in good repair, and use an EPA-registered repellent. Container mosquitoes like Aedes aegypti, which spread dengue, breed in water as small as a flowerpot saucer and bite during the day. Bug zappers, ultrasonic devices, and repellent wristbands don’t help. Counties and mosquito control districts handle area spraying, and residents can request service.

Fire ants: what you’re dealing with

The red imported fire ant arrived from South America in the 1930s and 1940s and is now everywhere in Florida. A mature colony can hold up to 240,000 workers, and a queen can lay up to 1,500 eggs a day. Key facts:

• Mounds: Sandy Florida soil often produces flatter mounds than in other states. Colonies also nest under pavement, along foundations, around stumps, and inside electrical boxes and AC units, where they can cause short circuits.
• Stings: Disturbed ants swarm and sting repeatedly. Each sting burns and forms a white pustule about a day later, and the itching can last up to 10 days.
• Allergic reactions: Some people react severely. Seek emergency care immediately for chest pain, trouble breathing, serious swelling, nausea, sweating, or slurred speech after stings. People with a known allergy should see an allergist and carry prescribed epinephrine.

For ordinary stings, an over-the-counter sting relief product helps. Leave the pustules unbroken, since broken ones can get infected.

The two-step method for fire ants

Only about a fifth of a colony is out foraging at any time, and the queen is deep underground. That’s why spraying the ants you see, or pouring something on the mound, rarely ends the colony. Baits work because workers carry them back to the queen. UF/IFAS’s approach:

• Step 1, broadcast bait. Spread a fire ant bait over the whole lawn once or twice a year, usually spring and fall. Apply when ants are foraging. To test, set a spoonful of bait near a mound, and if ants carry it off within about 10 to 45 minutes, conditions are right. Apply when soil is between roughly 70°F and 90°F, the grass is dry, and no rain is expected. In summer, apply late in the day.
• Use fresh bait. Ants ignore stale or rancid bait, so use opened bags within the label’s time frame, and don’t store bait near gasoline or fertilizer.
• Expect a wait. Fast-acting baits work in about 1 to 4 weeks. Growth-regulator baits take 2 to 6 months but last longer.
• Step 2, treat what’s left. Several days later, treat individual mounds in play areas, along walkways, and near doors with a labeled drench, granule, or dust. Don’t disturb the mound first. For a drench, soak the mound starting from the outside and working in, about a gallon for a small mound.
• Re-treat when needed. Neighbors’ yards and new queens re-infest treated areas, and populations can rebound within 12 to 18 months. Re-bait when mounds return.

Organic options exist, including spinosad baits and d-limonene mound drenches, though “organic” doesn’t automatically mean safer. With kids and pets:

• Follow label re-entry times.
• Teach children to spot and avoid mounds.
• Wear closed shoes in the yard.
• Keep treatments away from ponds and lakes.

Products that kill all ants also kill the native ants that compete with fire ants, so target fire ants specifically. See lawn care in Central Florida and Florida-friendly landscaping.

Mosquitoes: why Central Florida has a real disease risk

Many Florida mosquitoes are just a nuisance, but two that breed around homes matter most:

• The yellow fever mosquito (Aedes aegypti) spreads dengue and chikungunya. It breeds in small containers like flowerpots, tires, and buckets, thrives in neighborhoods, and bites during the day, indoors and out.
• The Asian tiger mosquito (Aedes albopictus) has bold black-and-white stripes, also breeds in containers, and bites by day, especially early morning and late afternoon. Its eggs can survive dry for up to a year, waiting for the next rain.

Dengue is now a recurring concern in Central Florida. As of mid-October 2026:

• The Florida Department of Health had confirmed five locally acquired dengue cases in Orange County for the year.
• Orange County was under a mosquito-borne illness alert.
• Orange County Mosquito Control announced aerial spraying over Apopka and Pine Hills.
• Polk and Brevard were under mosquito-borne illness advisories.

Dengue causes flu-like illness with fever, severe muscle and joint pain, and sometimes a rash, usually within two weeks of a bite. It doesn’t spread person to person, only through mosquitoes. West Nile virus and eastern equine encephalitis also circulate in Florida, mostly in other regions this year. The state’s weekly arbovirus report has current counts.

Drain and cover: what actually reduces mosquitoes

Because container mosquitoes breed in small pockets of water around homes, clearing water in your own yard, and encouraging neighbors to do the same, makes a real difference. The Florida Department of Health’s “drain and cover” steps:

• Drain water from garbage cans, gutters, buckets, coolers, toys, flowerpot saucers, tarps, and pool covers after rain or irrigation.
• Toss unused items that hold water, like old tires, bottles, and broken pots.
• Empty and clean birdbaths and pet water bowls at least twice a week. UF/IFAS adds bromeliads to the list, flushing their centers every three to four days in summer.
• Keep pools chlorinated and running, and empty kiddie pools when not in use. See owning a pool in Florida.
• Treat water you can’t drain, like rain barrels and ornamental ponds, with a Bti larvicide (dunks or granules), which targets mosquito larvae, or screen it.
• Cover skin with long sleeves and pants when mosquitoes are active, and repair torn window, door, and porch screens.
• Use an EPA-registered repellent on bare skin and follow the label. UF/IFAS notes the CDC-recommended ingredients include DEET, picaridin, oil of lemon eucalyptus, IR3535, and 2-undecanone. Permethrin is for clothing and gear, not skin. Check the label for age limits on young children.

Even after storms, standing water in gutters and yard debris breeds mosquitoes quickly, so add a drain-and-cover walk to the hurricane prep checklist. Watering rules and drainage are covered in Florida lawn watering restrictions and septic, sewer, and drainage.

What doesn’t work, or only works briefly

• Bug zappers kill mostly harmless insects, and UF/IFAS lists them among methods that don’t work for mosquitoes. Ultrasonic devices, “mosquito plants,” and repellent bracelets or wristbands don’t work either.
• Yard sprays and foggers give immediate but temporary relief, since new mosquitoes arrive or emerge within days, and they also kill beneficial insects. If used, apply when pollinators are less active.
• Fans do help on a porch or patio, since mosquitoes are weak fliers.

County mosquito control and spraying

Area-wide mosquito control in Florida is run by counties and special mosquito control districts under Chapter 388. Their work includes trapping, lab testing, larviciding, and truck or aerial spraying when mosquito counts or disease risk call for it. The Florida Department of Agriculture and Consumer Services keeps a directory of local mosquito control programs.

In Orange County, residents can call 311 and ask for Mosquito Control, or email the division, to report problems or request service. The county gives at least 48 hours’ notice before aerial spraying through its OC Alert notifications. Other counties have similar request lines. See the Orange, Seminole, Osceola, Lake, Polk, Volusia, and Brevard county guides.

For a private service, use a pest control company licensed by the Florida Department of Agriculture and Consumer Services, and ask what products it uses and how it protects pollinators and pets. Indoor pests such as palmetto bugs and spiders are covered in palmetto bugs, roaches, and spiders in Florida homes.

Sources

• UF/IFAS Extension, Managing Imported Fire Ants in Urban Areas (LH059)
• UF/IFAS Extension, Red Imported Fire Ant (EENY-195)
• UF/IFAS Gardening Solutions, Fire Ants
• UF/IFAS Extension, Mosquitoes and Their Control around Homes and Neighborhoods (ENY-753)
• UF/IFAS Extension, Yellow Fever Mosquito, Aedes aegypti (EENY-434)
• UF/IFAS Extension, Asian Tiger Mosquito, Aedes albopictus (EENY319)
• Florida Department of Health, Florida Arbovirus Surveillance, Week 39 (Sept 27 to Oct 3, 2026)
• Florida Department of Health in Orange County, Mosquito-Borne Illness Alert (Sept 18, 2026; updated Oct 12)
• Orange County Government, Mosquito Control Will Use Aerial Spraying to Prevent Dengue Fever (Oct 12, 2026)
• Orange County Government, Mosquito Safety
• Florida Department of Health in Brevard County, Drain and Cover
• Florida Department of Agriculture and Consumer Services, Florida Mosquito Control Program Directory
• Florida Statutes, Section 388.0101 (Mosquito control; legislative intent)

This article is for general informational purposes only and isn’t financial, legal, insurance, or tax advice – for guidance specific to your situation, talk to a licensed professional.