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The leaf lets in the outer wholes of leaves become yellow and spreads to the whole leaf and the leaves drooping down covering the stem.
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Later, the inner whole leaves also become yellow. Subsequently all the leaves droop, dry up and fall off, leaving the stem alone.
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Then the stem also become bittle and easily broken by heavy wind.
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The base of the stem shows brown discoloration and oozing of dark fluid.
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Bracket shaped fructifications of the fungus called ‘anabe’ appears at the base of the trunk. Roots become discoloured, brittle and dried.
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When infected trunk is cut brown discoloration can be seen up to one metre from ground level.
Dept of Agriculture Development 
SFAC Kerala