Turf thins and becomes chlorotic. They overseason in infected grasses. The airborne spores may be carried long distances. Cool to moderately warm, moist weather favors rust development. Condensed moisture, even dew, for 10 to 12 hours is sufficient for spores to infect plants.
Rusts are often more severe in shaded areas than sunlit areas.
Keep plants growing rapidly by nitrogen fertilization and irrigation. Most of the infected portions of leaves are removed by weekly mowing, and the spores on the mowed leaves die out rapidly. Removal of grass clippings from the turf may be beneficial. There are several fungicides that help control rust.