Bakanae disease / foot rot

Bakanae disease/foot rot:Gibberella fujikuroi


  • Infected plants several inches taller than normal plants in seedbed and field
  • Thin plants with yellowish green leaves and pale green flag leaves
  • Drying of seedlings at early tillering
  • Reduced tillering and drying leaves at late infection
  • Partially filled grains, sterile or empty grains for surviving plant at maturity
  • In the seedbed, infected seedlings with lesions on roots will die, which may die before or after transplanting

Identification of pathogen:

  • The pathogen sexually produces ascospores that are formed within a sac known as ascus.
  • The asci are cylindrical, piston-shaped, flattened above and are 90-102 x 7-9 µm. They are 4 to 6 spored but seldom 8 spored.
  • Hyphae are branched and septate. This fungus produces micro and macroconidiophores bearing micro and macroconidia respectively.
  • The sclerotia are 80 x 100 µm. They are dark blue and spherical. The stroma is more or less plectenchymatous and yellowish, brownish or violet.


  • Clean seeds should be used to minimize the occurrence of the disease.
  • Salt water can be used to separate lightweight, infected seeds from seed lots and thereby reduce seed borne inoculum.
  • Seed treatment using fungicides such as thiram or thiophanate-methyl or benomyl is effective before planting or Benomyl at 1-2% of seed weight may be used as dry seed coating
  • Seed treatment with organomercurials such as Agrosan GN or Ceresan @ 2 g a.i./kg seed is highly effective; steeping seeds in 1% copper sulphate solution or 2% formalin also recommended.



  • TamilNadu Agritech Portal
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