As the grass grows, it pushes rust-infected leaves outward, making it easy to mow and remove infected blades. Be sure to catch these clippings and remove them from the area. Mow regularly to remove infected leaf tips, but avoid mowing below the recommended height for the particular turf species. Prune surrounding trees and shrubs to improve light penetration and air circulation around densely shaded areas. If the lawn is badly infected or the combination of rust and other stress produces a poor lawn and forces a renovation, it is ideally done in mid- to late August.
Preventive fungicides are available, but they offer only a temporary solution.
Check the usual pest control handbooks for registered chemicals.