sooty mold

noun
  1. Plant Pathology. a disease of plants, characterized by a black, sooty growth covering the affected parts, caused by any of several fungi.
  2. any fungus causing this disease, as molds of the genera Capnodium, Phragmocapnias, and Scorias.

Origin of sooty mold

First recorded in 1900–05
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018