Course Content
Common bunt of wheat
Angular leaf spot/ bacterial blight/boll rot/black arm of cotton
Rice tungro virus
Rice grassy stunt virus
Rice ragged stunt virus
Rice yellow dwarf disease
Learn crop diseases and their management with Braimy- B.Sc agriculture
About Lesson

  Causative agent:  Ustilaginoidea virens (Syn: Claviceps oryzae – sativa)

  • Affects only panicle initiation to maturity.


  • Individual rice grain transformed into a mass of velvety spores or yellow fruiting bodies
  • Growth of velvety spores enclose floral parts
  • Immature spores slightly flattened, smooth, yellow, and covered by a membrane.
  • Growth of spores result to broken membrane
  • Mature spores orange and turn yellowish green or greenish black
  • Only few grains in a panicle are usually infected and the rest are normal.

Fact sheet - Rice false smut (428)

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