Mycosphaerellaceae family contains different fungal pathogens, which are affecting a wide range of plant hosts, including many economically important crops. The characteristic symptoms are leaf spots of different shapes and colors.
Signs of damage:
Tan to brown leaf spots, small black fruiting bodies (pycnidia) may be visible in the lesions. Lesions on Rudbeckia and Echinacea are purple. Lesions may be more severe on older foliage.
How to prevent:
Avoid overhead irrigation or carefully time it such that the duration of leaf wetness is minimized.