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Principle decay causing fungi in trees (part 7 of 8)

Pholiota squarrosa (Shaggy Scale-Head)

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Hosts

  • Ulmus, Sorbus aucaparia

 

Significance

  • Basal decay
  • Examine for decay or root killing

 

Ident Features

  • Pale ochre/yellowish-rusty fleshy toadstools
  • Brown recurved scales on stool
  • Tattered stem ring

 

 

 

 

Piptoporus betulinus (Razor Strop)

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Hosts

  • Betula S. England, also Fagus spp.

 

Significance

  • Brown rot – cubical to friable disintegration
  • Broken branches, pruning wounds dev. after primary infection by Chondrostereum purpureum
  • Safety hazard

 

Ident Features

  • Soft, smooth kidney shaped bracket
  • Darkens to pale grey/brown
  • Small round pores

 

 

 

 

Polyporus squamosus (Dryad’s Saddle)

Screen Shot 2015-10-06 at 23.54.18 Screen Shot 2015-10-06 at 23.54.29

Hosts

  • Acer (esp. A. pseudoplatanus), Fagus, Ulmus, Fraxinus, Tilia spp.

 

Significance

  • Advanced – intense white rot, cavity forming
  • Brown ‘felt’ mycelium in cavities
  • Pseudosclerotial plates
  • Zoned decay
  • Topped, extensive pruning or storm damaged trees are target
  • Failure risk if extensive decay

 

Ident Features

  • Soft, fleshy fan shaped bracket
  • Lateral stem
  • Upper – dark brown scales on straw yellow base
  • Lower – whitish pores
  • Stem, black at base

 

 

(Pseudo)trametes gibbosa (Beech Bracket)

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Hosts

  • Fagus sylvatica,, less common other spp.

 

Significance

  • White rot
  • Usu. Dead stumps, not documented as structural failure

 

Ident Features

  • Firm, corky bracket
  • Whitish becoming pale grey/buff w. algae
  • White upper and maze/labryinth pore tubes differ from Rigidoporus ulmaris & Perenniporia fraxinea

 

 

 

Sparassis crispa (Cauliflower Fungus)

Screen Shot 2015-10-06 at 23.55.04

Hosts

  • Pinus, Pseudotsuga, Abies, Picea, Larix spp.

 

Significance

  • Cubical brown rot, usu. confined to heartwood
  • Extensive decay, brittle fracture, hazard

 

Ident Features

  • Cauliflower, sponge appearance
  • White/ochre
  • Base or felled stems

 

 

 

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