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
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Soft watery mass |
Watery decay |
Mummified brinjal |
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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
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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%
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Source of Images:
https://www.plantvillage.com/en/topics/eggplant/infos/diseases_and_pests_description_uses_propagation |
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