In the initial stages, the fungus causes seed rot, seedling blight and root rot symptoms.
The affected leaves turn yellow in colour and brown irregular lesions appear on leaves.
On coalescence of such lesions, big blotches are formed and the affected leaves start drying prematurely.
Roots and basal portion of the stem become black in colour and the bark peels off easily.
The affected plants dry up gradually. When the tap root of the affected plant is split open, reddening of internal tissues is visible. The pathogen is soil-borne.
Management
Seed treatment with 2 gram Bavistin
Soil drenching with copper oxi chloride @ 4 g/L of water 10 days before planting
Spray carbendazim @ 1 g/L of water on leaves and stems one month after planting
Dept of Agriculture Development 
SFAC Kerala