Turf affected: St. Augustinegrass and zoysiagrass; it may also be observed on perennial ryegrass used to overseed lawns in the winter months.
Symptoms: Small yellow specks on leaves and stems develop into orange or red pustules. Heavily infected lawns may have an orange or reddish hue, and the lawn may begin to thin out. This “rust” will be visible on shoes and mowers after being on the lawn.
Disease occurrence: May through October
Management: Rust develops during times of drought and lack of fertility. Ensure proper fertilization, disease typically occurs due to lake of nitrogen. Collect and dispose of grass clippings when disease is present.