Tree Decline:

Description and Importance:

  • Decline: Decline is term used to describe a tree that is generally deteriorating
  • Serious threat to timber & fruit tree plants
  • cause losses up to 50 %
  • More prevalent in Shisham, Guava, Mango

Etiology:

  • Fusarium solani
  • Botryodiplodia theobromae
  • Phytophthora cinnamomi

Symptoms:

  • Leaves from the top start to become yellow
  • Sometimes single branch show the decline symptoms first, some time whole plant
  • Vigour of the tree is retarded*(stunted growth)
  • Internal infected part of the tree show brown to gray discoloration
  • Roots become black & rotten*(disintegration of cells due to pathogenic attack followed by release fluid) 

Management:

  • Apply balanced nutrition to the trees
  • Avoid to grow crops in mango & guava orchards
  • Avoid injury to the roots of the plants
  • Apply irrigation water separately to each tree by making trench around the tree
  • Apply Ridomil + Ca(OH)2 mixture at collar region of the tree

Download Files

tree-decline.docx (0.01 MB )