Brown Patch

• Brown patch is a fungal disease of St. Augustinegrass. The disease starts with the appearance of irregular shaped, light brown, dark bordered spots on grass blades.
  
  

Gray Leaf Spot

• Gray leaf spot disease on St. Augustinegrass is caused by the fungus Pyricularia grisea. The disease is characterized by gray to brown, 2- to 5-cm spots on grass blades. The spots often have a yellow or dark brown border.
  
  

Rust

• Rust is a fungal disease common to all turfgrasses and is caused by the Puccinia and Uromyces fungi. The disease starts with yellow, red, orange or brown spots on grass blades.