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Post Harvest Diseases:: Vegetables:: Brinjal

Fruit rot: Phomopsis vexans
Symptom:
  • First phase - blight on young seedlings
  • Stem - girdled slightly above the soil line, plant topples and dies
  • Stem lesion - dark brown, becoming grey in the centre as pycnidia develops
  • Leaf - irregular brown spots
  • Fruits – soft, watery & decays
  • Finally black, mummified as pycnidia develop abundantly over the surface
 
  Soft watery mass Watery decay Mummified brinjal
Identification of pathogen:
  • Pycnidia - with or without beak, brown to black
  • Conidiophores - hyaline, simple or branched,
  • Conidia - hyaline, one celled and subcylindrical
  • Stylophores - filiform, curved, hyaline, septate

Mode of spread and survival

  • Seed borne
  • Spread by rain splashes, implements and insects
  • Survives in infected plant debris in soil

Epidemiology

  • Temp - 29°C (fungal growth)
  • Storage rot of fruits is maximum at 25°C
Management:
  • Seed treatment - hot water @ 50oC for 30 min
  • Nursery - 0.2 % difolatan or captan 0.2% @ weekly interval
  • Field - Zineb 0.2 %, Bordeaux mixture 0.8%
Source of Images:
https://www.plantvillage.com/en/topics/eggplant/infos/diseases_and_pests_description_uses_propagation

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