This disease should respond well to a variety of fungicides in the absence of resistance problems. Avoid using the same chemical group repeatedly. The disease is more severe where turf is growing slowly due to drought and low nitrogen. It is also favored by long hours of moisture on leaf blades, so it is recommended to remove dew from fairways by mowing or whipping in the continuing humid weather. Just rake or hose away.
Drought is probably still the challenge in most areas.
Slow growing grass due to lack of water or fertilizer plus the humid air favors the development of rust in late summer. Rust is easily diagnosed by the abundant orange, powdery spores produced on leaf blades. These rub off on the fingers and white shoes and socks. They are not harmful to animals or people. Fungicides are helpful in severe conditions.