Two Pests That Move Fast
As fall approaches in North Carolina, two lawn pests become a real threat: fall armyworms and white grubs. Either one can take a healthy green lawn to brown and patchy in a matter of days. Both are manageable if you catch them early, so here’s what Raleigh homeowners should be watching for.
What are Armyworms?
Fall armyworms are the larval stage of a moth. They overwinter in Florida and migrate north through the season. By peak summer, female moths lay eggs in large clusters that can hatch inside of ten days. The caterpillars then move through a lawn in groups and are at their most destructive in late summer and early fall. They eat grass blades quickly, leaving bare patches that look like a dead lawn. Adults reach roughly 1 to 1½ inches and are typically green or brown. The name is apt — they travel in armies, so spotting one means there are many more nearby.
Signs of Armyworms
Catching them early is what keeps damage localized:
- Brown patches. Armyworm feeding leaves grass looking dry and dead, easily mistaken for late-summer drought stress. If you know the lawn has been watered properly, drought isn’t the explanation and something else is going on.
- Chewed blades. Look closely and you’ll see grass blades with frayed or chewed edges.
- More birds than usual. Armyworms are a food source, so a sudden increase in birds working over your lawn is worth investigating.
- Visible caterpillars. They’re often out in the open, marked with green, brown, or black stripes and an inverted Y shape on the head. Early morning and evening are when they’re most active.
White Grubs
Grubs are the other common culprit in North Carolina. They’re the white, C-shaped larvae of beetles — Japanese beetles and June bugs among them. Grubs live below the surface and feed on grass roots, which produces brown, dying patches. Like armyworms, they peak in late summer and early fall.
Signs of Grub Damage
- Spongy turf. A grub-infested lawn feels soft or loose underfoot because the root structure holding it together has been eaten.
- Brown patches that lift. The discoloration resembles drought damage, but affected turf peels back like loose carpet — with the grubs visible underneath.
- Digging animals. Raccoons, skunks, and birds tearing up sections of yard are usually hunting grubs, and they’ll do additional damage in the process.
Preventing Common Lawn Pests in North Carolina
Prevention is far less work than treatment:
- Keep the lawn healthy. Consistent mowing, watering, and fertilization produce turf that resists pest pressure better. Proper watering also makes it easier to tell pest damage from drought stress.
- Inspect regularly. Walk the lawn often through late summer and early fall, when both pests are active.
- Support natural predators. Birds and beneficial insects suppress armyworm and grub populations on their own.
- Use preventative treatments. Preventative insecticides applied in spring can head off both pests. Fairway Green can get your lawn on the schedule for the next application window.
Treating an Active Infestation in Your Lawn
If you find either pest, move quickly:
- Get professional input. For a severe or uncertain situation, an insecticide treatment applied promptly limits how far the damage spreads.
- Consider biological controls. Beneficial nematodes target grubs and armyworms without harming beneficial insects. They’re a reasonable eco-friendly option, though they may not be enough on their own for a large infestation.
- Prep before treating. Water and mow the lawn first so the product can penetrate to where the pests actually are.
Helping the Lawn Recover from Armyworms & Grubs
Once the pests are handled, damaged turf needs support:
- Aeration. Aerating after pest damage helps rebuild root systems, which is what took the hit.
- Overseeding. Fall fescue seeding is worth doing regardless, and it’s the most direct way to fill in areas lost to pests.
- Fertilization. A balanced fertilizer drives new growth and speeds recovery.
- Watering. Keep the lawn well watered throughout recovery to support regrowth.
Lawn Pest Control in the Triangle
Armyworms and grubs do real damage, but they’re preventable and treatable with the right timing. If you want help, Fairway Green is a local lawn care company with years of experience treating North Carolina lawns. Our services include lawn pest control, weed control and fertilization, aeration and seeding, and more. Contact us for a free quote.
