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Brown Dead Spots in Centipede Grass

Centipede grass (Eremochloa ophiuroides) is low-maintenance and spreads with creeping rhizomes. The coarse-textured grass is a native of China and thrives in acidic, sandy soil. Centipede grass keeps it color all year in areas with mild weather. A fungal disease leads to the appearance of brown spots in the grass.

  1. Identification

    • Dollar spot is a fungal disease prevalent in centipede grass during summer. The disease is caused by Scelerotinia homoeocarpa. Poorly managed and nutrient deficient turf is more prone to the disease.

    Damage

    • The disease is characterized by the appearance of 2- to 4-inch diameter, brown spots on the grass. The spots are larger during cool and wet weather. Grass infected with fungus continues to decline progressively especially during dry weather. The fungus affects the tissues of grass blades and does not penetrate to roots or crown.

    Management

    • Avoid overwatering grass and do not water in late evening or afternoon. Apply nitrogen fertilizer during late summer or spring to minimize chances of disease. Fungicidal control options include the use of chlorothalonil, triadimefon, or thiophanate-methyl.