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Principle decay causing fungi in trees (part 6 of 8)

Daldinia concertina (Kings Alfreds Cakes)

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Hosts

  • Fraxinus spp, less common on deciduous trees

 

Significance

  • White rot
  • Zonal degrade ‘calico’
  • Small trunks or branches, not safety hazard

 

Ident Features

  • Hard, black hemispherical
  • Internally, concentric domes, charcoal quality

 

 

 

Fistulina hepatica (Beefsteak Fungus)

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Hosts

  • Quercus, Castanea, occ Fraxinus, Fagus, Salix, Juglans, Carpinus & Ulmus spp

 

Significance

  • Soft rot developing to brown cubical rot, but not crumbly
  • Deep discoluration on Quercus (valuable)
  • Little loss of strength until extensive, not significant unless present for long time

 

Ident Features

  • Tongue shaped, semi-circular bracket
  • Initially creamy becoming purplish red/brown, exuding red juice when broken

 

 

 

Hypholoma fasciculare (Sulphur Tuft)

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Hosts

  • Common on deciduous trees, H. capnoides on some conifers

 

Significance

  • Occupies large volumes of dead root systems
  • No serious decay in living trees
  • Windsnap on dead trees

 

Ident Features

  • Pale yellow toadstools, gills maturing green
  • No stem collar

 

 

 

Laetiporus sulphureus (Chicken-of-the-Woods)

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Hosts

  • Quercus, Castanea, Taxus, Robinia spp, less common on others

 

Significance

  • Spores can reside in cells inactive
  • Yellow/red discolouration on wood developing to red/brown
  • Cubical cracking in advanced stages
  • Yellow/white mycelium sheath fill cracks
  • Slow heartwood decay
  • Windsnap/windthrow
  • Sapwood unaffected
  • Dangerous if extensive inc. structural timber (spores survive seasoning)

 

Ident Features

  • Brackets or fronds, single or groups
  • Bright yellow fading to dull cream
  • Short tubes

 

 

 

 

Perenniporia fraxinea

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Hosts

  • Fraxinus, Robinia, Laburnum, Ulmus, Platanus x hispanica, populus & Fagus spp, but rare

 

Significance

  • Advanced – intense white rot, forming cavities
  • Brittle fracture of stem

 

Ident Features

  • Hard, woody bracket forming stem base
  • Whitish dev. brown/black
  • Fawn/yellow tubes differing from Rigidoporus ulmarius

 

 

 

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