Jacksonville's Lawn Pest Problem
If you live in Jacksonville and have St. Augustine grass — which is the vast majority of local lawns — you're growing the turf variety that's most susceptible to insect damage in our region. St. Augustine grass is beautiful, shade-tolerant, and well-adapted to our climate, but it's also the preferred food source for several destructive lawn pests that thrive in Northeast Florida's warm, humid conditions.
The frustrating thing about lawn pests is that the damage often looks like something else. Brown patches spreading across your lawn? Most homeowners assume it's drought stress or a fungal disease and respond by watering more or applying fungicide. But if the real culprit is chinch bugs or grubs, those treatments won't help — and the damage continues spreading while you're treating the wrong problem.
The Most Destructive Lawn Pests in Jacksonville
Chinch Bugs
Chinch bugs are the number one lawn pest in Jacksonville — responsible for more turf damage than any other insect in our area. These tiny bugs (about the size of a pinhead) feed by inserting their mouthparts into grass blades and sucking out the plant juices while simultaneously injecting a toxin that blocks water movement within the plant. The result is grass that yellows, browns, and dies in expanding patches.
Chinch bug damage typically appears first in the sunniest, driest areas of your lawn — along driveways, sidewalks, and south-facing slopes where heat stress is already highest. The damage spreads outward from these initial spots as the chinch bug population grows and migrates to adjacent healthy grass. By the time you notice the brown patches, the chinch bugs have usually been feeding for several weeks.
To check for chinch bugs, get down close to the grass at the edge of a damaged area — the transition zone between dead and healthy grass. Part the grass blades and look at the soil surface and base of the plants. Chinch bugs are small (1/5 inch), black with white wings, and move quickly when disturbed. You may also see the smaller, reddish nymphs.
Grubs (White Grubs)
Grubs are the larval stage of various beetle species — primarily June bugs and masked chafers in Jacksonville. These C-shaped, white larvae live in the soil just below the grass roots, feeding on the root system. As they consume roots, the grass above loses its ability to absorb water and nutrients, turning brown and eventually dying.
The telltale sign of grub damage is turf that peels up easily — like rolling back a carpet. Because grubs have severed the roots, the grass is no longer anchored to the soil. You can literally pull up sections of damaged turf with your hands. Another indicator is increased activity from armadillos, birds, or raccoons digging in your lawn — they're feeding on the grubs below the surface.
Armyworms
Fall armyworms can devastate a Jacksonville lawn seemingly overnight. These caterpillars feed on grass blades in large groups, and a heavy infestation can strip a lawn down to bare stems within 2-3 days. Armyworm damage looks different from chinch bugs or grubs — instead of brown patches, you'll see areas where the grass blades have been chewed down to stubs, giving the lawn a ragged, scalped appearance.
Armyworms are most active in late summer and fall (August through October) in Jacksonville. They feed primarily at night and on overcast days, hiding in the thatch layer during bright sunshine. Check for armyworms by pouring soapy water on a suspect area — the irritation drives them to the surface where you can see and count them.
Mole Crickets
Mole crickets are unusual pests that damage lawns in two ways: their tunneling activity disrupts root systems and dries out soil, and they feed directly on grass roots and stems. Mole cricket damage appears as areas of spongy, dying turf with visible tunneling just below the surface. The tunnels feel soft and spongy underfoot, and affected areas dry out faster than surrounding healthy turf.
Mole crickets are most active at night and after rain, when they tunnel near the surface. Their damage is most visible in spring when their tunneling activity increases, and in fall when the next generation of nymphs begins feeding. Jacksonville's sandy soil is ideal for mole cricket tunneling, which is why they're a persistent problem in our area.
Our Lawn Pest Treatment Approach
Identification First
Effective lawn pest control starts with correct identification. Different pests require different products, application methods, and timing. We inspect your lawn to determine exactly which pest is causing the damage, how extensive the infestation is, and what treatment approach will be most effective. This prevents wasted time and money treating the wrong problem.
Targeted Treatment
Once we've identified the pest, we apply targeted treatment using products specifically labeled for that species. For chinch bugs, we use liquid or granular insecticides applied to affected areas and a buffer zone of surrounding healthy turf. For grubs, we apply granular products that penetrate the soil to reach larvae at root depth. For armyworms, we treat the entire lawn surface because these pests move quickly across large areas.
Follow-Up and Prevention
Most lawn pest treatments require a follow-up application 2-4 weeks after the initial treatment to catch any pests that survived or hatched after the first application. We also discuss preventive strategies — proper mowing height, irrigation practices, and fertilization timing that promote healthy turf better able to withstand and recover from pest pressure.
Areas We Serve
We provide professional lawn pest control throughout Jacksonville and Northeast Florida: