Causal Agent: 

Fungi (Rhizopus sp.)

Characteristic Symptoms:
 
Fruit rot starts as water-soaked lesion in any part of the fruit at any stage of maturity.
   
Later, the lesion becomes covered by a web-like mycelia and sporangia of the fungus.
   
The entire fruit maybe covered with the fungus few days after.
   
Conditions for Disease Development:
 
Rhizopus spp. is known to be omnipresent in the air.
   
Primary hosts are cucurbits and eggplant.
   
Infection on fruits usually starts on wounds and bruises.
   
Temperature at 20 to 30°C favors disease development.
   
Management and Control:
 
Prevent unnecessary wounding of the fruits.
   
Control insects.
   
Remove infected fruits and dispose properly by burying.
   
Apply copper-based fungicides, mancozeb or chlorothalonil
References:
https://keys.lucidcentral.org/keys/sweetpotato/key/Sweetpotato%20Diagnotes/Media/Html/
TheProblems/DiseasesFungal/RhizopusSoftRot/Rhizopus%20soft%20rot.htm

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