Mahali / kolerogo/ fruit rot: Phytophthora arecae
Symptoms:
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Rotting and excessive shedding of immature nuts from the trees.
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The water soaked spots initially develop at the base of the nut. Fruit stalks and rachis of inflorescence are also affected.
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Nuts show large vacuoles and dark brown radial strands.
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Very often the top of the affected trees dries up resulting in withering of leaves and bunches.
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Affected nuts fall off and show the white mycelial growth of the fungus.
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 |
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| Shedding of immature nuts |
Dark brown radial strands |
Withering of leaves |
White mycelial growth |
Management:
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Clean cultivation
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Destruction of affected trees.
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Collection and burning of fallen nuts.
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Spray with Bordeaux mixture 1% before on set of the monsoon and second spray 40-45.
Image Source:
http://www.kissankerala.net:8080/KISSAN-CHDSS/English/index1.html |
