Carpetgrass Dying in South Texas: Overwatering, Fungus, or Insects?

Laredo area. Carpetgrass declining despite 2x/day watering (6 AM, 8 PM). No grubs. Weeds taking over. Cornmeal/laundry soap heard as remedy.

Three Likely Causes

1. Overwatering: 8 PM watering keeps blades wet all night → fungus heaven.
2. Fungus: Hot + humid + night water = brown patch, take-all. ID needed for fungicide.
3. Insects: Chinch bugs, billbugs—soap flush to confirm.

Immediate Changes

• Stop 8 PM watering. Water early AM only, deeply, infrequently.
• Soap flush for insects.
• If fungus suspected, send sample to Extension for ID before spraying.

Cornmeal/Soap?

No scientific basis. Anecdotal only. Fix the culture first.

Night watering in South Texas summer is the #1 lawn killer.