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Webbed Brown Patches in New Fescue: Sod Webworm or Caterpillar

Visible webbing + spreading dead spots = likely sod webworm or caterpillar. Check for small moths flushing when mowing, green pellets at soil level. Soap-flush to confirm. Treat with Bt (early) or pyrethroid. Adults don't damage grass.

Lawns: Phalaenopsis Keiki on Old Spike: Removal and Potting After Mother Plant Declined; Seeding After Weed & Feed: Check Label, Then Scalp and Seed; Walking on Newly Seeded Lawn: Keep Off Until Mowing Height; St. Augustine Dying Along Driveway: Chinch Bugs or Irrigation Gap?; Wedding Lawn Crisis: Hire a Pro Now; Grass Brown at Base Only: Normal, Not Dying; New St. Augustine Sod Turning Brown in Dry Florida Weather; Diagnosing Brown Patches in a New Lawn; New Grass Dying in Spots: Fungus or Overwatering?; Australian Lawn Dieback: Cool-Season Invasion or Grubs?

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