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Production · Protection · Nutrients · Water
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Mahali / kolerogo/ fruit rot: Phytophthora arecae

Symptoms:

  • Rotting and excessive shedding of immature nuts from the trees.
  • The water soaked spots initially develop at the base of the nut. Fruit stalks and rachis of inflorescence are also affected.
  • Nuts show large vacuoles and dark brown radial strands.
  • Very often the top of the affected trees dries up resulting in withering of leaves and bunches.
  • Affected nuts fall off and show the white mycelial growth of the fungus.

Management:

  • Clean cultivation
  • Destruction of affected trees.
  • Collection and burning of fallen nuts.
  • 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

Shedding of immature nutsDark brown radial strandsWithering of leavesWhite mycelial growth