Planting After Clearing Land with Armillaria Root Rot

Armillaria Persistence

Armillaria (oak root fungus) survives for years in dead stumps and large roots. If clearing removed stumps and major roots, risk is reduced but not eliminated.

Site Evaluation

1. Contact state forester for free on-site assessment of residual inoculum.
2. Soil solarization (clear plastic for 4–6 weeks in summer) can reduce fungal populations in top 12 inches.
3. Plant resistant species: Choose trees with known Armillaria tolerance (e.g., bald cypress, black gum, certain pines).
4. Avoid susceptible hosts: Oaks, maples, fruit trees, roses.

Reference

USDA Forest Service: Armillaria Root Disease.