black root rot fungus


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Noun1.black root rot fungus - fungus causing black root rot in apples
genus Xylaria, Xylaria - type genus of Xylariaceae; fungi with perithecia in the upper part of erect black woody stromata
fungus - an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia