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Horticultural crops :: Vegetables:: Chilli

Damping off: Pythium aphanidermatum 

  • The populations in nursery seedlings die due to this diseases
  • Mycelium are hyaline and Aseptate and its has width size 5 micron
  • Irregular mycelial fibers grown and thus produce irregular shape spores

Symptoms

  • Seedlings killed before emergence
  • Water soaking and shrivelling of stem
  • Factors favouring infection:Moist soils poordrainage 90-100% R.H soil temperature 20°C
  • Impact of disease symptoms shown at after sowing of seeds in seed beds
  • It will reduce the seed germination percentage
  • its affects the young seedlings and their stems
  • lodging of seedlings due to weaken stems
  • disease affected seedling are seen light brownish colour
  • diseases spread through seeds and soil.

Management

  • Soil drenching with Copper oxychloride 0.25%
  • avoid shade places for nursery establishment
  • use recommended seed rate
  • avoid flooding type of irrigation and maintain optimum moisture level in nursery
  • use Thiram or Capton @ 4g/ kg of seeds for seed rate

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