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
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C/O: Pyrenophora tritici-repentis


  • Small, oval to diamond-shaped spots.
  • These spots will enlarge and turn tan, often with a yellow border, and have a small dark brown spot resembling an “eyespot” near the center.
  • Eyespot symptom is best observed when holding the leaf up to the sunlight.
  • Infected kernels can develop a reddish discoloration on the seed coat, which commonly is called “red smudge”.

Fungal Leaf Spot Diseases of Wheat: Tan spot, Septoria/Stagonospora nodorum  blotch and Septoria tritici blotch | NDSU Agriculture and Extension

Fig: Tan, necrotic center with yellow halo.   

Tan spot of cereals  

Fig: Red smudge in wheat

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