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Morphology of Alternaria argyranthemi from Chrysanthemum coronarium. (A) Colony on PDA. (B) Colony on PCA. (C–G) Chlamydospores (microsclerotia) formed on PCA at 22 °C for 7 days (bar = 20 μm). (H) Sporulation patterns on the host plant (bar = 50 μm). (I) Conidia produced on diseased leaves inoculated at 22 °C (bar = 20 μm).
