TNAU Agritech Portal
Home | About Us | Success Stories | Farmers Association | Farmers' Innovation | Publications | Contact

Horticultural crops :: Plantation crops:: Coconut

Coconut Tanjore wilt Disease Management
TANJORE WILT/ BASAL STEM END ROT/ GANODERMA WILT: Ganoderma lucidem and Ganoderma applanatum
Symptom:
  • Initial symptoms of Thanjore wilt (Ganoderma wilt) start with yellowing and drooping of the outer whorl of leaves.
  • This is followed by exudation of reddish brown liquid through cracks at the base of the trunk and oozing spread upwards.
  • Decaying of tissues at bleeding point and rotting of the basal portion of the stem
  • The bark turns brittle and often gets peeled off in flakes, leaving open cracks and crevices. The internal tissues are discoloured, disintegrated and emitting a bad smell.
  • Bracket formation at the base of the trunk during rainy season. Ultimately the palm dies off.
Stem bleeding Basal stem rot - bracket formation Drooping of leaves Big fructification

Management:
Cultural method

  • Remove and destroy all affected palms.
  • Green manure crops must be raised and ploughed in situ before flowering.

Biological method

  • Apply Pseudomonas fluorescens (Pf-1) @ 200g/palm + Trichoderma viride @ 200g/palm/year.
  • Apply 200g Phosphobacteria and 200 g Azotobactor mixed with 50kg of FYM/palm.
  • Apply FYM 50kg + neem cake 5 Kg once in 6 months along with fertilizers.

Chemical method

  • The bleeding patches in the stem may be chiseled and protected with tridemorph (5% calxin) and subsequently with hot coal tar.
  • Aureofungin-sol 2 g +1 g Copper Sulphate in 100ml water applied as root feeding. (The active absorbing root of pencil thickness must be selected and a slanting cut is made. Keep the solution in a polythene bag or bottle and the cut end of the root should be dipped in the solution).
  • Root feeding with Tridemorph 2ml or Hexaconazole 1 ml with 100 ml of water (3 times at 3 months interval).
  • Forty litres of 1% Bordeaux mixture should be applied as soil drench around the trunk in a radius of 1.5m.

Home | About Us | Success Stories | Farmers Association | Farmers' Innovation | Publications | Contact Us

© 2015 TNAU. All Rights Reserved.