Which mosquitoes does the yard plan target?
The City of Jacksonville names Aedes albopictus and Aedes aegypti as the mosquitoes active in the city from about the end of April to the end of September. Those are container breeders, which means they lay eggs in small pools of water close to homes, so the yard is the main place to act.
Aedes mosquitoes do not need a pond or a marsh to breed. They use small containers of water, and a yard full of saucers, buckets and gutters can produce a large number of adults from a small area. That is why a yard plan starts with the water and not with the spray.
The city's listed season gives the plan its timing. A treatment that runs only in the peak weeks misses the first and last weeks of activity, and a plan that starts when the first bite is felt is late. The visits are scheduled against the season, with the first visit early enough to matter.
The city's district program covers the wider area for residents at no charge. A yard plan does not replace it. The two work at different scales, and a homeowner who uses both is in a better position than one who uses either alone.
What can a homeowner remove before any visit?
Empty every container that holds water, clear gutters and drains, fill low spots that hold water, and keep pet bowls and bird baths fresh. These steps cost nothing and remove the places where the mosquitoes breed, so they are the most useful things a homeowner can do.
A saucer under a pot holds water after every rain, and it is one of the most common breeding sites in a Jacksonville yard. Tip the saucer or fill it with sand so it does not hold standing water. The same applies to any tray, bucket or plant pot that collects rain.
Gutters are easy to overlook. A gutter that is clogged with leaves holds water, and the mosquitoes that breed in it can reach the house. Clearing gutters after a storm is a simple step, and it also helps the wall stay dry, which matters for termites as well.
Toys, tarps and garden tools left outside collect rain in their folds. A quick check after each storm, and the habit of storing those items upright or under cover, removes a large share of breeding sites with almost no effort.
- Empty buckets, tubs, toys and wheelbarrows after rain.
- Tip or fill plant saucers and pet bowls.
- Clear gutters and downspouts of leaves.
- Fill or grade low spots that hold water.
- Change bird bath water at least weekly.
How does treatment reach the shade where mosquitoes rest?
Adult mosquitoes rest in shade during the day, so the treatment is aimed at the shrubs, the underside of dense beds, the fence line and the shaded corners of the lawn. The product and its use follow the label, and the area treated is recorded.
Resting sites are the cool, damp, shaded parts of the yard. A dense shrub that stays shaded all day is a resting site, and so is a fence line that is never in sun. Treating those areas reaches the adults before they leave to feed, which is the point at which bites happen.
The technician chooses the product for each area according to its label and the use it allows. Some areas are treated with a residual application and others are left alone, for example where a plant is edible or a pet has access to the bed. The plan says which areas were treated and why.
A treatment does not last forever, and the weather plays a part. Rain can wash a residual application away and sun can break it down. The visit schedule accounts for that, and the homeowner should report a return of biting adults so the next visit can be timed to it.
How should visits be timed through the season?
Start the first visit before the season peak in late spring, schedule the middle visits through the summer, and end with a late-season check before late September. The timing should follow the city's season and the yard's condition, not a fixed calendar set in advance.
The first visit comes before the peak, when the water and the resting sites can be cleared and treated before the population is high. That visit does the most work, because the homeowner is most likely to act on the list at that point.
The middle visits follow the weather and the yard. A wet spell can bring a new flush of breeding, and a dry spell can slow it. The homeowner's report of biting adults or of new standing water is the best guide to when to add a visit.
The late-season visit covers the end of the window the city reports. Removing the water and the resting sites before the season closes makes the next spring's start easier, so the last visit is part of the plan rather than an afterthought.
- An early visit before the population peaks.
- Middle visits set by the weather and the yard's condition.
- A late-season check before the end of September.
- A short list of home tasks between each visit.
How does the city program fit alongside a private visit?
The City of Jacksonville Mosquito Control Division covers all of Duval County and provides its service free to residents. A private yard visit works on the homeowner's own lot and does not replace the city program, so a homeowner can use both without either one being the complete answer.
The city program works at the scale of neighborhoods and districts, and it treats the wider area with its own methods. A private visit works at the scale of one lot, on the resting sites and breeding containers that are inside the homeowner's fence line.
A homeowner who notices a large number of mosquitoes in the area, rather than only on their own lot, should ask the city to inspect. The city route is described on the request page, and it is free to residents.
Using both is the sensible approach. The city reduces the population across the area, and the yard work removes the sites that are on the homeowner's own property. Neither one controls every mosquito, and the homeowner's own clearing is the part that depends entirely on the homeowner.
