The leaf lets in outer whorls become yellow and spreads to the whole leaf and the leaves droop down covering the stem.
Later, the inner whorl leaves also become yellow. Subsequently all the leaves droop, dry up and fall off, leaving the stem alone.
Then the stem becomes brittle and easily broken by heavy wind.
The base of the stem shows brown discoloration and oozing of dark fluid
Bracket shaped fructifications of the fungus called ‘anabe’ appears at the base of the trunk.
Roots become discoloured, brittle and dried
When infected trunk is cut open brown discoloration can be seen up to one metre from ground level.
Management
Remove and destroy all severely affected palms and stumps of dead palms.
Discourage growing of collateral hosts of fungus such as Delonix regia and Pongamia glabra in the vicinity of gardens.
Avoid flood irrigation and water flowing from infected palms to healthy palms.
Apply 2 kg neem cake per palm.
Isolate affected palms by digging trenches 60 cm deep and 30 cm wide around, one metre away from the base and drench with calixin (0.08%) or copper oxychloride (0.3%)
Drench the soil with 1% Bordeaux mixture before planting healthy seedlings.
