Rust - Warm Season Grass
Grass species affected
- St. Augustinegrass
- Rust may be observed on perennial ryegrass used to overseed lawns during the winter months.
- May through October
- Rust typically occurs due to nitrogen deficiency.
- Rust typically develops due to nitrogen deficiency and during times of drought.
- Small, yellow specks on leaf blades and stems that develop orange or red pustules.
- Heavily infected lawns may have an orange or reddish hue and may begin to thin out.
- The “rust” will be visible on shoes and mowers.
- Maintain a regular fertilization schedule.
- Water deeply and infrequently early in the day to allow the leaf blades to dry off and not remain wet for long periods of time.
- Mow unaffected areas first and diseased areas last to avoid infecting healthy lawn.
- Collect and dispose of grass clippings in the garbage when rust is present.
- To avoid spreading the fungus, after mowing, clean the mower blades by rising with water and drying with a cloth.