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Alternaria japonica Yoshii 1941
This fungus is widely distributed and infects mainly plants from the family Brassicaceae, causing leaf spot and damping-off diseases. The lesions are typically dark brown (black spot disease) and the disease incidence can exceed 20% in young plants. The conidia are beakless, around 40-60 x 15 µm in size, with longitudinal and constricted transverse septa. In addition, knots of dark, thick-walled micro-chlamydospores are produced (Tidwell et al., 2014).