Moths in Lawn: Adults Aren't the Problem—Larvae Are

Best product to kill moths in lawn?

Moths Don't Eat Grass

Adult moths are nectar-feeders or non-feeding. Females lay eggs → caterpillars (sod webworms, cutworms, armyworms) eat grass.

Monitor, Don't Spray Adults

• Fluttering moths ≠ imminent damage.
• ID species (e.g., sod webworm: small, tan, zigzag flight at dusk).
• Learn its life cycle: when larvae hatch, when they feed.

Treat at Larval Stage

Apply Bt (Bacillus thuringiensis) or labeled insecticide when caterpillars are young and actively feeding. OSU fact sheet: Sod Webworm Management.

Target the eaters, not the flyers.