Bright orange/brown/black spots, or pustules develop on the upper leaf surface with corresponding bright orange spore masses beneath. Dark brown over-wintering spores can often be seen from late summer/early autumn. Severely infected leaves will drop prematurely. The most common and obvious infections occur in early summer. Moist air is essential for the development and spread. Product Solution: Multirose Concentrate 2, Fungus Fighter Disease Control Ready To Use, Systhane Fungus Fighter. Spray preventatively.