disease_shape_globose
circular
The circular lesions, up to c. 8 mm diam., become very dark brown or black with the chlorotic halos on the upper surface being less distinct and developing later than those of M. arachidis. Mycosphaerella herkeleyi symptoms are most clearly identified by the distinct dark stroma of the conidial state which develops on the undersurface of the leaf; M. arachidis forms conidia on both surfaces and has no such stroma. Severe attacks cause defoliation
Mycosphaerella berkeleyi
Nothopassalora personata