Mosquito control in Mobile, AL — one call to a licensed operator.

Mobile’s relationship with mosquitoes runs deeper than almost any city in the country’s public-health memory. Through the 1800s, yellow fever repeatedly emptied Mobile’s streets — the 1853 and 1897 epidemics drove residents out to the pine barrens north of town, closed the port to shipping, and left the city with a lasting institutional wariness of standing water that predates modern vector science by a century. That history is part of why Mobile still treats mosquito control as public infrastructure rather than a seasonal nuisance, with a county mosquito-control program that has operated continuously for decades.

What has changed is which mosquitoes are doing the biting. Aedes aegypti and the Asian tiger mosquito, Aedes albopictus, are the two species behind most daytime bites today, and both are container breeders that live within a few yards of the people they bite — not in some distant swamp. A clogged gutter on a Midtown shotgun house, a saucer under an azalea pot on Old Dauphin Way, a bromeliad on an Oakleigh Historic District porch, a forgotten kiddie pool in a west Mobile slab-subdivision backyard, a boat tarp holding rainwater in a driveway — and in a city this full of boats, that last one matters more than most homeowners realize. Each of those sites is a nursery producing biting adults within the same block where people sit outside.

Between rain events, a second species takes over. Culex mosquitoes breed in Mobile’s extensive storm-drain network — catch basins, curb inlets and the standing water that collects along Government Street and Dauphin Street downtown — and they are the species most often tied to West Nile virus locally. Because that habitat is underground infrastructure rather than a backyard, it calls for a different approach than a homeowner walkthrough: a barrier program timed to the drain network itself, not just the yard.

Mobile’s lowlands add a third layer. Dog River, Three Mile Creek and the marshy delta-edge ground where the city meets Mobile Bay hold water long after a storm passes, and after a hard summer downpour or a tropical system, floodwater species emerge in the neighborhoods that back up to those corridors. Azalea-garden irrigation culture — the soaker hoses and drip systems that keep Mobile’s famous spring gardens blooming — adds a steady low-level water source through the growing season, on top of whatever the weather provides.

• Season length: mosquito pressure in Mobile runs roughly February to November — the longest window in the state.
• Barrier cadence: treatment on resting vegetation typically needs to repeat every 21 to 30 days to hold through that stretch.
• Water that won’t drain: fountains, rain barrels and low spots get larvicide dunks rather than a spray.
• Source reduction: a walkthrough often finds the container ten feet from the porch that’s outproducing everything else.

Hurricane season adds a spike on top of that baseline. Standing water left behind by tropical systems — pooled yards, clogged drainage, downed-tree root wells — can turn into a mosquito surge within one to two weeks of a storm, right as cleanup crews and residents are spending the most time outdoors.

The county’s aerial and truck-spray program manages broad public-health risk across Mobile County; it does not reach into a specific backyard or treat the container breeding under a specific porch. That is the gap a yard-level operator fills — and it is the operator this line matches Mobile callers with, working the resting vegetation, the water that will not drain, and the source right next to the house.

• “What’s your ADAI license number?” Every legitimate Alabama operator carries one, and the Pesticide Management Section in Montgomery can confirm it. A pro expects the question.
• “Will you treat resting vegetation, or just fog the yard once?” A single fog knocks down what’s flying that hour. Lasting control targets the shaded shrub lines and fence rows where adults rest between bites.
• “How often do you come back?” Mobile’s long season means barrier treatment on resting vegetation typically needs reapplication every 21 to 30 days to hold, not a single visit.
• “What do you do with water I can’t drain?” Fountains, rain barrels and low spots that never dry should get larvicide dunks, not just a perimeter spray. Ask which sites on your property get which method.
• “Do you do a source-reduction walkthrough?” The container breeding closest to the house is often the biggest driver. Ask the operator to walk the yard and point out what they find, not just spray and leave.

None of these questions are rude, and none slow a good operator down. The ones who work Mobile’s neighborhoods every week answer them without blinking — and the answers tell you who you’re dealing with before any money changes hands.