Rust is a disease of slow growing turf. Rust is most noticeable on lawns that are newly planted and malnourished, both excellent conditions favoring the development of this turf problem. The good news is that rust is seldom a serious problem and will rarely completely kill a turf.
Mostly it is just aesthetically unpleasing. From a distance, rust-infected turf has a yellow green cast. Close inspection of the rusted leaves reveals numerous yellow-orange pustules on the blades of grass. Walking through grass that has been significantly infected will result in a rust color orange on one’s shoes or lawn mower.
Maintaining a healthy lawn is the most effective and efficient method of control. Fertilize the turf with a high dose of nitrogen and avoid watering in the evening. The grass will eventually outgrow the disease.