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Chinch bug damage shows as yellow to brown patches. In St. Augustinegrass, a heavily infested lawn turns yellow first, then quickly dark brown, and the center of a patch can go dead and bare, according to UF/IFAS Gardening Solutions. Chinch bugs are the most difficult pest of St. Augustinegrass, so confirm them at the edge of a patch before you pay for a repair.
If bugs are the cause, the repair is to remove the dead turf and fill the area with plugs, sprigs or sod. One national price guide puts St. Augustine sod at $0.98 to $1.79 per square foot installed in 2026, and new sod waits 3 to 4 weeks before its first mow.
Dead patches in lawn in July: is it chinch bugs?
UF/IFAS says chinch bugs are most active in warm weather but can do damage year-round, mainly in South Florida. Tampa is in central Florida, so the warm months are the main risk. Tampa International Airport averages about 94 days a year at 90°F or hotter, and August, the hottest month, has a normal daily high of 91.2°F (NOAA climate normals).
Chinch bug injury usually shows first in grass that is water-stressed or in full sun. Start your search in the sunniest part of the lawn and in any spot that gets less water than the rest.
Check the edge before you patch
UF/IFAS gives two ways to confirm chinch bugs, and both start at the edge between the brown and the green grass:
- Look along that edge for tiny black-and-white adults or orange nymphs.
- Vacuum about 1 square foot of the edge and dump what you collect on white paper.
A patch with no bugs at its edge still needs an answer. Find what killed an area before you patch it, UF/IFAS advises: check the sprinklers for missed or overwatered spots, and look for insects or disease.
Brown patches that merge in summer: what else it could be
Several other problems leave dead or yellow areas in a Florida summer lawn:
- White grubs. Mild damage leaves turf yellow and is hard to diagnose; major damage leaves large areas of dead turf.
- Mole crickets. They tunnel through roots. Pour soapy water over a few square feet of turf to bring them up so you can count them.
- Tropical sod webworms. They can quickly make a lawn look scalped. Check the blades for chewing; grass usually recovers with proper watering.
- Large patch, often called brown patch. This fungus (Rhizoctonia solani) shows up mostly when temperatures drop below 80 degrees, usually November to May in Florida, so it is a cool-weather disease here, not a summer one. It starts as round patches with darker edges, sometimes orange, and a brown, sunken center.
Local conditions
Yellow dying grass in drought: thirst, thatch or chinch bugs?
Chinch bugs hit stressed turf. UF/IFAS lists poor sprinkler coverage, mowing too short, too much nitrogen and thatch build-up as conditions that invite them. Each has its own fix.
Water stress and sprinkler coverage
Tampa water customers may water lawns once a week, on a day set by the last digit of the house number: 0-1 Monday, 2-3 Tuesday, 4-5 Wednesday, 6-7 Thursday and 8-9 Friday. Watering is allowed only from midnight to 4 a.m. or 8 p.m. to 11:59 p.m. on that day, under the City of Tampa water use restrictions effective April 3, 2026. The regional one-day-a-week order runs until March 31, 2027, and it applies to homes on private wells too.
Watering more than the rules allow is not a fix. Breaking them can bring fines up to $500 and a mandatory court appearance, and citations can be issued on first observance. The better fix is coverage. For Central Florida, UF/IFAS FAWN says 1/2 to 3/4 inch of water a week is generally the most a home lawn needs in the hottest part of the year, a ceiling and not a target. After 0.3 inch of rain in 24 hours, or 1 inch in 3 days, irrigation may not be needed that day. Grass the sprinklers miss is water-stressed grass, and that is where chinch bug injury usually shows first.
Thatch build-up
Thatch is the thick, spongy mat grass builds when it gets too much water or fertilizer or the wrong mowing, and UF/IFAS calls it "a perfect habitat for chinch bugs." If it has to come out, use a vertical mower and water afterward; UF/IFAS adds that sand topdressing is the best biological control and core aeration helps prevent it. More in our guide to thick thatch in a lawn.
Mowing height and nitrogen
A mower set too short and too much nitrogen are the other two conditions on the UF/IFAS list. Fertilizer is not a quick fix in July. In the City of Tampa, lawn and landscape fertilizer with nitrogen or phosphorus may not be applied from June 1 to September 30, so a summer feeding to green up a yellow lawn is off the table. The city's fertilizer page also points to a Hillsborough EPC rule that applies in Tampa: no fertilizer within 10 feet of water.
Cost
What the fix involves and what it costs
UF/IFAS puts non-chemical steps first: less thatch and less fertilizer. Chinch bugs are becoming resistant to many insecticides, so treat only with a suitable pesticide and rotate products each season. The UF/IFAS St. Augustinegrass page adds that any treatment should be done in the spring.
Who applies a treatment matters. In Florida, anyone applying pesticide to lawns for hire must hold their own FDACS certification or work under a licensed Lawn and Ornamental operator, and a Commercial Landscape Maintenance card covers plant beds, not turf (UF/IFAS Extension Martin County). Ask who will apply any weed or pest treatment and which state licence they hold.
Once the cause is dealt with, the UF/IFAS renovation guide calls for removing the dead turf and filling with plugs, sprigs or sod. Where damage is extensive, it suggests replacing those areas with a different grass or another plant rather than patching, and UF/IFAS Extension Hillsborough County says to replace a lawn when 30% or more of it is weeds, bare spots or damage. Ask us which grass suits your yard's sun and water before you re-sod after chinch bug damage.
National ranges for the repair line items, 2026:
| Line item | National range | What it covers |
|---|---|---|
| Sod material alone | $0.31 to $0.82 per square foot | Material only (This Old House) |
| St. Augustine sod, installed | $0.98 to $1.79 per square foot | $0.41 to $0.86 per square foot without installation |
| Removing weeds and old grass | $0.88 to $1.84 per square foot | Disposal included |
| Tilling and grading before sod | $0.90 to $2 per square foot | Ground prep before new sod |
These ranges are per square foot, so the size of the damaged area drives the total. Other things that move the price: whether installation is included, whether old grass has to come out, whether the soil needs tilling and grading, and the grass type. Zoysia sod runs $1.04 to $1.65 per square foot installed and Bahia $0.77 to $1.26 (national ranges, 2026). Ask for a written, itemized price after the crew walks your Tampa yard and measures it. Ask for a written start date and finish date with the quote. For how other jobs are priced, see our landscaping cost guide.
Re-sodding after chinch bug damage in Tampa
Prep comes first. The UF/IFAS planting guide lists these steps: clear debris, roots and rocks, kill and remove the old grass, get a soil test through the county Extension office, and grade the soil to slope away from the house. UF/IFAS Extension Hillsborough County adds two rules: rototill compacted soil 6 to 8 inches deep before laying sod, and never lay sod over existing weeds and grass. After prep, the order is:
- Lay sod within 24 hours of delivery, and lightly water the soil just before you start.
- Water new sod lightly but often for the first 2 to 3 weeks, keeping the soil moist but not soggy, then taper off once it roots. In Tampa, new sod still may not be watered between 4 a.m. and 8 p.m.; the city points to the UF/IFAS 30-day establishment schedule, then normal days apply.
- Wait 3 to 4 weeks before the first mow, and 30 to 60 days before fertilizing. In the City of Tampa, the June 1 to September 30 ban on nitrogen and phosphorus fertilizer still applies in that window.
Timing matters too. Spring is usually the ideal time to lay sod in Florida, though sod can root in any season if the ground is well prepared. Summer heat can quickly dry out rootless new sod, and summer rain helps it grow. The Tampa Bay rainy season runs from May 25 to October 10 (National Weather Service). If patches show up in July, ask us whether to lay sod now or wait. For the wider picture of lawn, bed and yard projects, see landscaping in Tampa.
Chinch bug damage questions
How do I tell chinch bug damage from other dead patches?
Look at the edge between brown and green grass for tiny black-and-white adults or orange nymphs, or vacuum about 1 square foot of that edge and dump it on white paper. If you find no bugs, check the sprinklers for missed or overwatered spots and look for other insects or disease.
Can I fertilize to green the lawn back up?
Not in the City of Tampa from June 1 to September 30, when nitrogen and phosphorus lawn fertilizer may not be applied. UF/IFAS also lists too much nitrogen among the conditions that invite chinch bugs.
Can I water more to save the lawn?
Not beyond Tampa's rules: once a week, on the day set by your house number, between midnight and 4 a.m. or 8 p.m. and 11:59 p.m. City of Tampa fines run up to $500. Checking the sprinklers for missed spots is the better move.
Do I have to replace the whole lawn?
Not necessarily. UF/IFAS Extension Hillsborough County advises replacing a lawn when 30% or more of it is weeds, bare spots or damage. For smaller damage, the repair is to remove the dead turf and fill with plugs, sprigs or sod.
How much does a chinch bug repair cost in Tampa?
One national price guide gives St. Augustine sod in 2026 at $0.98 to $1.79 per square foot installed. Ask for a written, itemized price after the crew walks your Tampa yard and measures it.
Cost
Get a written price for your Tampa lawn
Call us or use the form. Tampa Landscaping Pros calls you back within one business day. The crew comes out and measures your lawn, and you get a written price before any work starts.