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Call Us Today at : (512) 561-7451Duval County, Florida
Jacksonville spreads over 874 square miles on both banks of the St. Johns River, from early 1900s bungalows in Riverside to newer houses on the Southside and homes near the ocean. Each setting has its own pests, so each gets its own plan.
Jacksonville is the most populous city proper in Florida, with 949,611 residents in the 2020 census, and since it consolidated with Duval County in 1968 it has been the largest city by total area in the contiguous United States. The St. Johns River runs through the middle, the Trout River joins from the north side, and Atlantic beaches mark the eastern edge. About 52 inches of rain fall each year, mostly in downpours between May and September.
That much water and ground means one treatment plan cannot fit every address. Riverside filled with families displaced by the Great Fire of 1901, San Marco broke ground in 1925, and Arlington and the Southside grew later. Before recommending residential, commercial or real estate service, we look at how the building is put together, how near the river it sits and what the yard holds.
Native Reticulitermes termites are the everyday threat: University of Florida entomologists say the eastern subterranean termite flies on warm, sunny afternoons following rain, January into April, and one colony can forage 150 feet. Jacksonville also has the imported Formosan subterranean termite, with UF collection records from the city dating to 1997. Formosan swarms leave just after dark from April through June, peak in May and gather at lights.
What people here call palmetto bugs are really three species. The American cockroach, which averages 1.5 inches in length, breeds in sewers and drains and comes indoors through the plumbing. The smokybrown and the wingless, slow Florida woods cockroach shelter in mulch, woodpiles and hollow trees before wandering in from the yard. UF/IFAS advises intact soffit and attic vent screens, sealed drain line openings and no limbs over the roof.
Florida's first Asian tiger mosquitoes turned up at a tire dump near Jacksonville in 1986. The species still breeds in tires, flowerpots and birdbaths and bites by day. Toward the coast, the black salt marsh mosquito hatches in huge numbers after flooding rain and can travel far inland. The city's Mosquito Control Division has worked across Duval County since 1957.
The most damaging insect pest of St. Augustinegrass, according to UF/IFAS Extension Duval County, is the southern chinch bug. It tends to strike in spring and summer when drought stresses the turf, and the county's agent has also found it active during winter heat waves, so a dead patch in January is not always fungus. Because chinch bugs have developed resistance to several insecticide classes, products have to be rotated.
UF/IFAS describes the roof rat as Florida's primary suburban pest rat, one that often goes unnoticed while it settles into attics, soffits and hollow walls and gnaws wiring. The heavier Norway rat turns up mostly along coasts and canals and in urban centers, which suits a city with Florida's largest seaport by volume. We begin with exclusion at the roofline and foundation, then trap whatever is already inside.
Jacksonville usually has only 10 to 15 nights at or below freezing, and the cold seldom lasts long. Eastern subterranean termites start daytime flights in January, and the county Extension agent has found chinch bugs feeding during winter warm spells.
Formosan termites start swarming in April, so winged insects circling the porch light after dark deserve a closer look. Lovebugs fill the air for about four weeks in April and May, and yellowjacket queens that wintered alone begin new nests.
Most of the year's rain arrives as short thunderstorms. Buckets, plant saucers and clogged gutters become mosquito nurseries, and fire ants may move indoors after a soaking. Hurricane Irma in 2017 drove river flooding past the record Hurricane Dora set in 1964; because subterranean termites depend on moisture, wood left wet near a foundation should be checked afterward.
Riverside's many bungalows give Jacksonville what is likely the largest number of such houses in Florida, most built between the 1901 fire and the collapse of the 1920s land boom. UF notes that drywood termites favor older city neighborhoods with aged wood, and its map shows West Indian drywood termite finds here, so we look for their hard, six-sided pellets as well as mud tubes.
Newer subdivisions in Mandarin, Baymeadows and out toward the beaches bring a different list: mulch against the slab edge, irrigation that keeps soil damp and wide St. Augustine lawns. Keeping plants and mulch off the lower wall makes termite tubes easy to spot. Eco-friendly products are our default, and nothing is applied until you have heard what we found.
Yes. UF's Fort Lauderdale research center maps termite collections statewide, and its Formosan subterranean termite records for Jacksonville begin in 1997, with more than a dozen added in 2026 alone. They swarm at dusk in late spring and fly to lights. Native subterranean termites are present as well, so any swarm inside the house is reason enough to book an inspection.
Southern chinch bugs are a leading suspect, especially in a dry spell. Damage shows as yellow to brown patches that spread outward. To check, push an open-ended can two to three inches into the soil at the edge of the damage, fill it with water and watch for five minutes; chinch bugs float up. If none appear, test three or four more spots before blaming disease.
The city's Mosquito Control Division handles area spraying and inspections, and residents can request service by calling 630-CITY. The Florida Department of Health asks homeowners to drain buckets, toys, pool covers and flowerpots and to repair screens. A private yard treatment adds control in the shaded places where daytime biters rest.
Riverside bungalow or Southside slab, /quote returns a free estimate, /schedule-pest-control-service books the visit, and (512) 561-7451 answers questions about plans from $57.
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