| Fruit rot: Pythium aphanidermatum |
Symptom:
- Fruits in intimate contact with soil is affected
- Forms a luxuriant wooly mycelial mat on the affected fruits
- Skin of the friut shows soft, dark green, water soaked lesions
- Interior tissue become watery and soft and decaying matter emits a bad odour
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| Soil contacted infected cucumber |
Wool mycelial mat on cucumber |
Wool mycelial mat on pumkin |
Pythium Rot on Mini Pumpkin |
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Identification of pathogen:
- Mycelium - intra-cellular, hyaline and coenocytic
- Oogonia - smooth and spherical
- Antheridia - broadly clavate, terminal or intercallary
- Spreads among the fruits during the storage and transit
- High moisture and temperature - favours the growth
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Management:
- Soil drenching with copperoxychloride - 0.25%
- Fruits should be kept away from soil
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Source of Images:
http://onvegetables.com/2012/09/06/harvest-rots-and-disorders-of-pumpkins-and-squash/
http://wiki.bugwood.org/HPIPM:Pythium_Fruit_Rot
http://vegetablemdonline.ppath.cornell.edu/DiagnosticKeys/CucurFrt/Pythium/Pyth_pump.htm
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