Spring Hill Sprinkler Repair Dry or brown patches in the lawn: irrigation gap or chinch bugs?
A dry or brown patch has two very different likely causes, and treating the wrong one wastes money without fixing anything. One is a coverage gap in the irrigation system itself. The other is chinch bugs, a pest problem that irrigation cannot solve. Telling them apart before spending money is the whole point of this page.
Check this first (five minutes)
- Look at the shape and location of the patch. A patch near a corner, along a slope, or in a spot noticeably farther from any sprinkler head than the rest of the zone points toward a coverage gap. An irregular, spreading patch with no obvious relationship to head placement is more consistent with chinch bugs.
- Watch the zone run and see if water actually reaches the patch. If the patch sits in a visible dead zone where spray clearly does not land, that is your answer.
- Look for the bugs. UF/IFAS Extension’s own guidance (Pasco County Extension, January 2026) describes tiny black-and-white, or sometimes orange, bugs visible right at the border between healthy grass and damaged grass as the tell for a chinch bug problem. A close look at that border, especially on a hot, dry day, is worth doing before assuming it is irrigation.
- Consider the location generally. Chinch bug damage commonly shows up worst near sidewalks, driveways, and other hot, reflective surfaces, which unfortunately overlaps with where irrigation coverage gaps also tend to appear, so location alone will not settle it. The border-of-the-patch bug check is the more reliable signal.
What is usually wrong
| What you notice | Likely cause | Fix and cost |
|---|---|---|
| Patch tied to a specific spot no head reaches | Irrigation coverage gap | $100-$275 coverage adjustment |
| Patch worsens evenly with watering restriction | Underwatering under the current schedule, or a coverage gap made worse by it | $100-$275 coverage adjustment |
| Irregular, spreading patch, bugs visible at the border | Chinch bugs | Pest control, not irrigation; see below |
| Patch appears despite confirmed even spray coverage | Likely pest or disease, not irrigation | Pest control referral |
| Uniform browning across most of the lawn in cool weather | Normal seasonal dormancy in warm-season grass | Not a problem to treat |
Why this is worth checking carefully
Watering helps a drought-stressed patch recover. It does nothing for an established chinch bug population, which keeps spreading regardless of how much water lands on it. If the actual cause is chinch bugs, running more water (or paying for an irrigation fix that was not needed) delays the correct pest-control response while the damage keeps growing. Conversely, if the cause is a genuine coverage gap, no amount of pest treatment will make grass grow in a spot the sprinklers simply do not reach. Getting the diagnosis right the first time saves money either way.
We will tell you honestly which one we think you have during a service visit, and if the evidence points to chinch bugs or another pest or disease issue rather than irrigation, we will say so rather than sell a coverage adjustment that would not fix it.
Where we work
On site across Spring Hill, Brooksville, Weeki Wachee, Hudson, Masaryktown, Ridge Manor, Timber Pines, and Hernando Beach. See Zone Coverage Fix & Adjustment for the irrigation-side repair.
Frequently Asked Questions
How do I tell an irrigation problem from chinch bugs?
Look at the pattern and look for the bugs. An irrigation gap is usually tied to head placement: worse at a corner, a slope, or a spot the nearest head cannot reach, and it stays roughly the same shape over time. Chinch bug damage is irregular and spreads outward from a point, and UF/IFAS Extension guidance points to tiny black-and-white or orange bugs visible right at the border between healthy and damaged grass as the confirming sign.
Will running the sprinklers more fix a brown patch?
Only if the cause is actually a coverage gap. Watering helps drought-stressed turf, but it will not eliminate an established chinch bug population, so more water on a chinch bug patch just delays noticing the real problem while the patch keeps spreading.
What does it cost to fix an irrigation coverage gap?
$100 to $275 for a coverage adjustment, re-aiming or re-nozzling heads or adding one to close a gap the current layout cannot reach.
Is chinch bug treatment something you do?
No, chinch bugs are a pest control issue, not an irrigation issue. What we can do is confirm honestly whether your irrigation coverage is adequate first, so you are not paying a pest control company to treat a lawn that was simply under-watered in one spot.