Fall Armyworm

About Fall Armyworm

Fall armyworms (Spodoptera frugiperda) do not overwinter in Tennessee. Every year, moths migrate north from Florida, and in some years — roughly every five, though the pattern is irregular and unpredictable — everything aligns perfectly for a massive population explosion far north of normal breeding zones. When that happens, the results are devastating. Armyworm infestations start along shrub lines where moths lay their larvae. The caterpillars work their way outward at an impressive pace. An entire lawn can be consumed overnight — eaten down to the roots. When infestations are severe, the ground literally looks like it is moving because there are so many larvae. It is both fascinating and horrifying. The key to armyworm protection is preventive application before you see damage. The insecticide chemistry we use controls both armyworms and grubs simultaneously through a novel mode of action that is bee-safe and has no known resistance pathway — insects cannot adapt to it. This chemistry is applied preventively as part of the standard lawn care service plan. It is not an add-on, not an upsell, and not something you are charged extra for when an armyworm event happens. This matters because armyworm events are unpredictable. You might go five years without one, then get hit with a devastating infestation overnight. If you are not already protected when it arrives, there is no time to react — the damage happens in hours, not days. Many lawn care companies treat armyworm protection as an optional add-on. We include it as standard because the cost of prevention is negligible compared to the cost of rebuilding an entire lawn from seed or sod after an armyworm event. The chemistry we use for armyworm and grub prevention is also very persistent in the plant tissue itself. You actually get carryover coverage the following year from the prior year service — another example of how compounding quality in a multi-year treatment relationship produces a lawn that gets better and more resilient over time.

Fall Armyworm (Spodoptera frugiperda) is a turf pest commonly found in Middle Tennessee, including Columbia, Thompson's Station, Spring Hill, and the surrounding areas. This entry is part of our Turf Pests identification guide.

As lawn care and treatment specialists, we encounter Fall Armyworm regularly when servicing properties across the region. Proper identification is the first step toward effective pest management that protects both your turf and your landscape plantings.