Skip to Main navigation Skip to Left navigation Skip to Main content Skip to Footer

University of Minnesota Extension
www.extension.umn.edu
612-624-1222

Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous Trees > Kentucky coffeetree > Canopy thin, dying branches

Print Icon Email Icon Share Icon

Kentucky coffeetree > Trunk/Branches > Canopy thin, dead or dying branches

1 of 2
  • Ganoderma root and butt rot 1
  • Ganoderma root and butt rot 2
  • Ganoderma root and butt rot 3

Ganoderma root and butt rot
Ganoderma spp.

  • Leaves are smaller in size and turn yellow earlier than normal
  • Canopy appears thin with few leaves and multiple dead branches
  • Fungal conks, semicircle shelf fungi, can be found singly or in clusters from the base of the tree up to 3 feet high on the trunk
  • Conks are reddish brown and shiny on top, white and porous underneath, a rim of white may be visible on the edge of growing conks
  • Infected wood at the base of the tree is white, soft, stringy or spongy
  • Infected trees frequently break or fall over in storms
  • Most frequent on stressed trees and/or those with mechanical wounds
  • More information on Ganoderma butt rot...
2 of 2
  • Verticillium wilt 1
  • Verticillium wilt 2
  • Verticillium wilt 3

Verticillium wilt
Verticillium albo-atrum and V. dahliae

  • Leaves are small and yellow in chronic infections
  • Leaves turn brown from the edges and tips, wilt and die in severe infections
  • Leaf symptoms are often seen on only one or a few random branches in the canopy
  • Dark streaks often can be seen in the sapwood if the bark is peeled back, appearing as rings or arcs in a cross cut
  • Symptoms may develop over a single growing season, or over several years
  • More information on Verticillium wilt...

Don't see what you're looking for?

  • © Regents of the University of Minnesota. All rights reserved.
  • The University of Minnesota is an equal opportunity educator and employer. Privacy