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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous Trees > Honeylocust > Dead branches or branch dieback

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Honeylocust > Branches > Dead branches or branch dieback

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  • Image: Ganoderma root and butt rot 1
  • Image: Ganoderma root and butt rot 2
  • Image: Ganoderma root and butt rot 3

Ganoderma root and butt rot
Ganoderma spp.

  • Canopy appears thin with few leaves and multiple dead branches
  • Leaves are smaller in size and turn yellow earlier than normal
  • Fungal conks, a semicircle shelf fungi, can be found 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
  • More information on Ganoderma root and butt rot...
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  • Image: Sapwood rot 1
  • Image: Sapwood rot 2
  • Image: Sapwood rot 3

Sapwood rot
Schizophyllum commune

  • Dead branches within the canopy
  • Groups or rows of small (<2 inches wide) semi-circle self fungi along killed branches or on the main trunk
  • Shelf fungi are white and appear fuzzy on top
  • Common on trees with an open wound or crack
  • Wood below fungal shelves is yellowish to white, crumbly and decayed; bark around fungal shelves is killed and often falls off
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  • Image: Coral spot canker 1
  • Image: Coral spot canker 2
  • Image: Coral spot canker 3

Coral spot canker
Nectria cinnabarina

  • Dead branches and twigs, often first observed in early spring when no leaves form
  • Or, wilting soon after leaves emerge in spring
  • Sunken dark brown area on branch that is often cracked or has a ridge at the edge
  • Raised cushion-like bumps on affected branches, may be cream to orange or red, turn black with age
  • Common on trees stressed by drought, recent transplant or other factors
  • More information on Coral spot canker...

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