Armyworms Are Back in the Carolinas: Here’s What We’re Seeing in Lawns
One of the things I love about this job is that no two seasons are exactly alike.
Every season presents a different challenge for our lawns. Sometimes it’s drought. Other times it’s disease. And then there are times when insects become the biggest concern.
Right now, my attention is on fall armyworms.
Clemson Extension’s latest pest tracker is showing reports across South Carolina, including York County, which tells me it’s time for homeowners – and lawn care professionals – to start paying attention.
Not every lawn is going to be affected. In fact, many won’t. But if armyworms find your yard, they can do a surprising amount of damage before you even realize they’re there.
That’s why our team is watching closely during every visit, and why I wanted to share what homeowners should know before these pests become more widespread.
What Are Fall Armyworms?
Despite the name, they aren’t worms at all.
They migrate into South Carolina every year from farther south because they can’t survive our winters. Once they arrive, adult moths lay eggs on grass blades, fences, landscape plants, and other nearby surfaces.
When those eggs hatch, the tiny caterpillars immediately begin feeding.
Here’s the scary part…
During the later stages of development, they consume more than 90% of the grass they’ll eat during their entire life cycle.
That’s why a lawn can look perfectly healthy one day and appear drought-stressed or scalped just a day or two later due to armyworm damage.
Why They’re Showing Up After All This Rain
This is what catches so many homeowners off guard.
After weeks of drought, the recent rainfall finally pushed lawns back into active growth.
Fresh, tender grass blades are exactly what female armyworm moths are looking for when choosing where to lay eggs.
So while the rain was fantastic for our lawns, it also created ideal feeding conditions for armyworms.
How to Tell If Armyworms Are the Problem
Armyworm damage is different from most lawn issues because it happens fast.
Here are a few signs we look for:
- Brown areas that seem to appear almost overnight
- Grass blades that have been eaten down, leaving stems behind
- Heavy bird activity in one area of the lawn as birds feed on the caterpillars
- Caterpillars crawling through the turf during early morning or evening
- A distinctive upside-down white “Y” on the caterpillar’s head
If you can clearly see that inverted “Y,” you’ve almost certainly found a fall armyworm.
One Simple Trick You Can Try at Home
If we’re suspicious that armyworms are present but don’t immediately see them, one of the easiest ways to confirm it is with a soap flush — a method Clemson Extension recommends.
Mix:
- 2 tablespoons of lemon-scented dish soap
- 1 gallon of water
Slowly pour the mixture over a section of damaged turf.
If armyworms are present, they’ll usually crawl to the surface within a few minutes.
It’s simple, inexpensive, and often provides a quick answer before any treatment decisions are made.
The Good News: Your Lawn Can Recover
The first question we usually hear is,
“Did they kill my lawn?”
Thankfully, for most established warm-season grasses like Bermuda, Zoysia, Centipede, and St. Augustine, the answer is usually no.
Armyworms feed on the leaf blades, not the underground runners or root system.
That means even though the lawn may look terrible, it often has an excellent chance of recovering with proper care once the feeding stops.
Tall fescue is a different story. Because of the way fescue grows, severe feeding can damage growing points and sometimes requires reseeding during the fall renovation season.
Can You Prevent Armyworms?
This is where I like to be honest with homeowners.
Unfortunately, there isn’t a magic preventative spray that protects every lawn all season long.
In fact, Clemson Extension generally does not recommend routine preventative insecticide applications for homeowners in regards to armyworms, since most products provide only short-term control.
Instead, the best strategy is:
- Keep an eye on your lawn during late summer.
- Catch infestations early.
- Treat active populations quickly before significant damage occurs.
That’s exactly how we approach it.
Yes – We Treat Lawns for Armyworms
If we confirm an active armyworm infestation, we can recommend and apply the appropriate treatment to stop additional feeding and help protect the remaining turf.
Timing matters.
Waiting even a few extra days can make a noticeable difference in how much grass is lost.
Our goal isn’t just to spray insecticide. It’s to correctly diagnose the problem first, because not every brown lawn is suffering from the same issue. Sometimes it’s fungus. Sometimes it’s drought stress. Sometimes it’s chinch bugs. And sometimes it’s an army of hungry caterpillars moving across the lawn.
Making the correct diagnosis is every bit as important as the treatment itself.
Final Thoughts from Will Hall
One of the things I enjoy most about this job is solving lawn mysteries.
Every week someone sends us a picture asking why their grass suddenly changed color or why one section looks completely different than the rest of the yard. There isn’t always one simple answer, and that’s why experience matters.
Right now, with recent rainfall and armyworm reports increasing across South Carolina, this is one of the first things we’re checking.
If your lawn has suddenly turned brown – even after all of the recent rainfall – don’t automatically assume it’s drought damage or fungus. It may be something that can be identified and treated before it spreads any farther.
If you’re concerned about armyworms in your lawn, contact us today. We’d be happy to take a look, determine what’s happening, and recommend the right solution.
Protect Your Lawn with Hippo Turf Care
Armyworms can do a surprising amount of damage in just a few days, but catching them early can make all the difference. If you’ve noticed your lawn changing rapidly or simply want a professional opinion, Hippo Turf Care is here to help.
We proudly serve homeowners throughout Blacksburg, Clover, Fort Mill, Indian Land, Lake Wylie, Rock Hill, Tega Cay, York, and surrounding South Carolina regions as well as Belmont, Kings Mountain, Steele Creek, Pineville, and surrounding North Carolina towns.
At Hippo Turf Care, that’s exactly what we’re watching for.
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