You water, you feed, you mow, and still patches of your lawn turn brown and die for no obvious reason. Maybe a section feels spongy underfoot, or peels back like loose carpet when you tug it. Maybe the damage spreads a little wider every week. If your lawn is dying in spots and good care is not fixing it, the culprit may be living in the soil or feeding on your grass: lawn pests. Grubs, chinch bugs, armyworms, and mole crickets do real damage across the New Orleans metro, and our warm, humid climate gives them a long season to work.

The frustrating part is that pest damage often looks like other problems. It can mimic drought stress, disease, or fertilizer burn, so homeowners treat the wrong thing while the real damage keeps spreading. This guide explains the major lawn pests we battle in our area, how to tell pest damage apart from other issues, and how to control them before they destroy your turf.

For how pest control fits into your full year of care, start with our seasonal lawn care guide for New Orleans.

What Lawn Grubs Are

Grubs are the larval stage of beetles, including June beetles and others common in Louisiana. They are small, white, C-shaped, and they live in the soil just beneath your grass. There they feed on grass roots, which is what makes them so destructive. A lawn with its roots eaten away cannot take up water or nutrients, so it browns out and dies even when you are doing everything else right.

The telltale sign of a grub problem is turf that lifts up easily, almost like a loose rug, because the roots holding it down have been chewed through. You may also notice irregular brown patches that grow over time, and increased activity from birds, armadillos, or skunks digging up your lawn to eat the grubs. In our area, armadillos rooting through a yard at night are a strong clue that grubs are present.

Grub damage typically shows up in late summer and fall, when the larvae are large and feeding heavily, though our long warm season can stretch the timeline.

The Other Pests That Plague Gulf Coast Lawns

Grubs get the headlines, but they are far from the only threat to a New Orleans lawn:

Chinch bugs. These tiny insects are one of the worst enemies of St. Augustine grass, which is the most common turf in our area. They suck the juices out of grass blades and inject a toxin, leaving irregular yellow then brown patches that spread, especially in hot, dry, sunny spots. Chinch bug damage is often mistaken for drought stress.
Armyworms. These caterpillars can appear in huge numbers and chew through a lawn shockingly fast, sometimes leaving brown, ragged turf within a day or two. They are most active in late summer and fall and can move across a yard like a wave.
Mole crickets. They tunnel through the soil, uprooting grass and creating spongy, raised trails. Their tunneling damages roots and dries out the turf above. They are a recurring problem in our sandy and clay soils.
Sod webworms. The larvae feed on grass blades at night, creating ragged, chewed-looking patches and thinning turf.

Each of these pests has its own life cycle and its own treatment timing. Lumping them together as just bugs and reaching for one generic spray rarely solves the problem.

Why New Orleans Lawns Are So Pest-Prone

Our climate is a pest paradise. Mild winters mean many pests survive the cold months and emerge in force, instead of being knocked back by hard freezes the way they are up north. Long, hot, humid summers give multiple generations time to develop in a single year. And our dominant grass, St. Augustine, while beautiful and well-suited to our heat, is a favorite target of chinch bugs in particular.

High humidity and warmth also stress the grass itself, and stressed lawns are more vulnerable to pests. A lawn already battling heat or poor watering has less ability to recover from an infestation. This is why pest control and overall lawn health are tightly linked, and why a struggling summer lawn often has more than one thing going wrong at once.

Telling Pest Damage From Other Problems

Before treating, it pays to be sure pests are actually the cause, because the treatment for grubs does nothing for fungus, and vice versa. Here are a few ways to check:

The tug test for grubs. If brown turf lifts up easily and you can see white C-shaped larvae in the soil underneath, you have grubs.
The float test for chinch bugs. Push a bottomless can into the soil at the edge of a brown patch and fill it with water. Chinch bugs float to the top within minutes.
Check the time of day. Some pests, like sod webworms, feed at night, so daytime damage with no visible bug may still be an insect problem.
Rule out look-alikes. Brown patches can also come from fungal disease, which thrives in our humidity. If the damage has a circular pattern or a darker ring, disease may be the cause instead. Our guide to lawn disease prevention in humid climates helps you tell the difference.

Getting the diagnosis right is half the battle. A free inspection takes the guesswork out, because we identify exactly what is feeding on your lawn before treating anything.

How Pest Control Works

Here is what a careful, professional pest treatment looks like step by step:

We inspect and diagnose. We confirm the pest with hands-on tests, the tug test for grubs, the float test for chinch bugs, and a close look at damage patterns, so we treat the actual problem.
We identify your grass type. St. Augustine, Bermuda, Zoysia, and Centipede each respond differently to treatment, and St. Augustine in particular needs careful product selection.
We choose the right product and timing. Grubs are treated when larvae are young and feeding near the surface. Chinch bugs and armyworms get surface treatments timed to their activity. Mole crickets need treatment when nymphs are small.
We treat the affected and surrounding areas. Pests spread, so we treat beyond the visible damage to stop the infestation from moving.
We address the underlying stress. Pests often follow weakness. We look at watering, mowing, and soil health so the lawn can recover and resist future attacks. Eco-friendly options are available for homeowners who prefer them.
We monitor and follow up. Some pests need a second treatment, and our long season can bring repeat waves, so we plan follow-up visits to keep the lawn protected.

Healthy Lawns Resist Pests

The single best defense against lawn pests is a thick, healthy lawn. Dense turf with deep roots can tolerate some feeding and bounce back, while a thin, stressed lawn collapses under the same pressure. Proper feeding builds that resilience, which is why our lawn fertilization schedule is part of a real pest strategy, not just a separate task.

Smart watering matters too. Overwatering creates the moist conditions some pests and diseases love, while underwatering stresses the grass and invites chinch bugs. Getting the balance right, as covered in our lawn watering schedule, keeps your lawn strong enough to fight back. Reviewing your full seasonal lawn care routine ties prevention, treatment, and recovery together across the year.

Frequently Asked Questions

How do I get rid of lawn grubs?
Confirm grubs are present with the tug test, then apply a targeted treatment timed to when larvae are young and feeding near the surface. See how do I get rid of lawn grubs for the full approach.

Why is my lawn dying in patches during the summer heat?
It could be grubs, chinch bugs, disease, or heat and watering stress, and these often overlap. Correct diagnosis is key. See why is my lawn dying in the summer heat.

Why does my lawn have brown spots that spread?
Spreading brown patches often mean chinch bugs or armyworms feeding, or a fungal disease taking hold in our humidity. The tug and float tests help tell them apart from lawn disease.

Do you offer eco-friendly pest treatments?
Yes. We offer eco-friendly options for homeowners who prefer them, and we always treat only what is needed. See do you offer eco-friendly lawn treatments.

How can I prevent pests in the first place?
A thick, well-fed, properly watered lawn resists pests far better than a stressed one. Good fertilization, smart watering, and regular monitoring are the best prevention.

Next Steps

If your lawn is dying in patches, lifting like loose carpet, or being dug up by armadillos at night, pests are likely the cause, and the longer you wait, the more turf you lose. TurnKey Lawn Care diagnoses the exact pest, matches the treatment to your grass type, and helps your lawn recover and resist future damage. We serve homeowners throughout the New Orleans metro, from Covington and Mandeville to Metairie, Gretna, and LaPlace.

As your friendly neighborhood lawn care partner, we offer free estimates, transparent pricing with no hidden charges, customized plans with eco-friendly options, and a satisfaction guarantee on our work. Call us today at (504) 386-5468 to schedule your free estimate and stop the damage before it spreads.