Black Slimy Balls in Yard: Fungus Identification and Treatment

Mysterious Black Fungus

A rural homeowner on sandy soil describes acres of black, slimy balls that make the yard slippery and stunt vegetable growth. The problem is spreading neighborhood‑wide.

Likely Cause

Sounds like a fungal outbreak, possibly exacerbated by excessive rainfall. Horticultural cornmeal is a broad‑spectrum organic fungicide.

Treatment

• Apply horticultural cornmeal at 20 lbs/1,000 sq ft (higher rate for severe cases).
• Water in well.
• Improve drainage if possible; avoid overwatering.

Cornmeal encourages beneficial fungi that parasitize pathogenic species.