Dithane Rainshield turf and ornamental specialty fungicide is a broad spectrum ornamental contact fungicide for preventative control of rust, scab and other key diseases. Dithane is labeled for use at nurseries, greenhouses, sod farms, landscape ornamentals, and other turf settings. Offers control of major leaf spots and blights on ornamentals plants as well as many different turgrasses. The active ingredient in dithane is mancozeb.