Which non-chemical management practice is recommended for take-all root rot on bermudagrass or zoysia?

• A. Improve drainage and avoid excess nitrogen
• B. Increase irrigation
• C. Add lime to raise pH
• D. Apply a broad-spectrum fungicide unless rotating

Answer: (A)

Take-all root rot in bermudagrass and zoysia is driven by wet soil conditions and excessive nitrogen, which create a favorable environment for the fungus to attack the roots. The most effective non-chemical approach is to change those conditions: improve drainage so the root zone isn’t constantly waterlogged and avoid applying more nitrogen than necessary, which promotes lush but susceptible growth. With better drainage and moderate fertility, roots stay healthier and disease pressure decreases without needing fungicides. Increasing irrigation would keep soils wetter and help the pathogen, while raising soil pH with lime is not the primary non-chemical tactic for this issue, and fungicides are chemical controls.