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Fungi in St. Augustine Grass

St. Augustine grass (Stenotaphrum secundatum) is a warm-season grass native to the Mediterranean and Gulf of Mexico. The green to blue-green grass adapts to most soil types and grows best in warm, humid weather. A number of fungi are likely to infest St. Augustine grass lawns.

  1. Identification

    • St. Augustine grass is susceptible to fairy ring disease caused by Agrocybe spp., Lepiota spp or Marasmius oreades fungi and pythium blight caused by the Pythium spp. fungi.

    Damage

    • Fairy ring fungus causes wide bands of dark green rings on grass that expand with time. Mushrooms often start to grow in the bands. The disease is common in grass with high levels of undecomposed organic matter and thatch. The fungi causing pythium blight prefers high temperatures of 80 to 95 degrees Fahrenheit. Pythium blight causes circles of gray-green grass that eventually turn brown as grass dies.

    Management

    • Keeping grass in good health with adequate water and fertilizer helps grass resist all fungi. Aerate and dethatch grass regularly to prevent fairy rings and pythium blight. Fungicidal control options are not recommended for either disease.

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Growing Grapes
  1. Fungi in New Saint Augustine Sod
  2. Sapphire Vs. Palmetto St. Augustine Grass
  3. St. Augustine Grass & White Aphids
  4. Kinds of St. Augustine Grass
  5. Nutrition & Growth of St. Augustine Grass
  6. Fungi in My Grass Lawn
  7. Bahia vs. St. Augustine Grass
  8. St. Augustine Grass Characteristics
  9. Centipede Vs. St Augustine Grass
  10. St Augustine Grass: Plugs vs. Sod
  11. How to Lay St Augustine Grass
  12. Bugs in St. Augustine Grass

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