sooty mould

noun

1. a fungal plant disease characterized by a blackish growth covering the surface of leaves, fruits, etc
2. any of various fungi, such as species of Meliola or Capnodium, that cause this disease

Example Sentences

If therefore the honey dew is kept off by destroying the Aphides which secrete it, Sooty Mould will not appear.

From Project Gutenberg

This species exudes copious honey-dew, upon which sooty mould develops, thus rendering fruit unfit for use.

From Project Gutenberg