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Calonectria pteridis Crous, M.J. Wingf. & Alfenas 1993
This fungus is widely distributed and infects a variety of different plants. For example, it causes leaf spot and blight diseases on eucalypts in South America and other regions. The necrotic lesions are initially small and round, but expand and can cover large parts of the leaves, resulting in premature leaf drop and even defoliation of the eucalypt trees.