Sycamore (Acer pseudoplatanus) infected with Rhytisma acerinum. Tar spot on leaves caused by an Ascomycete fungus plant pathogen

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Photo credit: © Ian Redding / Alamy / Afripics
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Keywords: acer, acerinum, ascomycete, biotrophic, black, border, chlorotic, cosmetic, disease, fungal, fungus, infection, leaf, lesions, maple, parasite, parasitic, pathogen, plant, pseudoplatanus, rhytisma, spot, sycamore, tar, tree, yellow