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Principle decay causing fungi in trees (part 4 of 8)

Rigidoporus ulmarius

Screen Shot 2015-10-06 at 22.14.47

Hosts

  • Ulmus, occ. Acer, Quercus & Populus spp

 

 

Significance

  • Brown cubical rot
  • Loss of tensile strength
  • Central buttress
  • Windthrow if extensive

 

Ident Features

  • Thick, woody brackets
  • Upper-whitish/cream, discoloured green by algae growth
  • Lower- cinnamon coloured tubes contrasting w pale flesh
  • Rare due to DED.

 

 

Heterobasidion annosum (Conifer-base Polypore)

Screen Shot 2015-10-06 at 22.14.58

Hosts

  • Pinus, Picea spp

 

 

Significance

  • Decay in roots, parasitic on cambium
  • Root to root transmission
  • Selective delignification
  • Early –grey/violet streaks then pocked red/brown patches
  • Decay in bole varies, SP v. resistant although roots gone
  • Early rot-ductile bending fracture
  • Prob -kills trees rather than windthrow

 

Ident Features

  • Rubbery, leathery brackets
  • Upper-brown, corrugated w. zonate pattern
  • Lower- creamy white, fine close spores
  • Base of stem or roots

 

 

Daedaleopsis confragosa (Thin Mazegill)

Screen Shot 2015-10-06 at 22.15.08

Hosts

  • Salix, Fagus, Prunus spp

 

 

Significance

  • White rot w brittle fracture
  • Confined to dead or damaged wood
  • No failiure of large limbs
  • Extensive – hazard so fell

 

Ident Features

  • Hard, thin, neat semi circular brackets
  • Upper-off white – reddish zones
  • Lower- white/grey bruising blood red when young
  • Pore round maturing to radially elongated

 

 

Inonotus dryadeus

Screen Shot 2015-10-06 at 22.15.18

Hosts

  • Quercus spp

 

 

Significance

  • Localised selective delignification
  • Yellow stripes expanding to pale within dark water soaked wood
  • Decay from root system to stem base
  • Never >2m up stem
  • Windthrow if extensive
  • Difficult to assess extent

 

Ident Features

  • Soft, thick, lumpy brackets
  • Upper-thin, yellow maturing to rusty brown
  • Lower- white pores, tube & flesh rusty brown
  • Flesh soft-corky-brittle w. age
  • Fresh-golden watery liquid on depression

 

 

 

Inonotus hispidus (Shaggy Polypore)

Screen Shot 2015-10-06 at 22.15.43Screen Shot 2015-10-06 at 22.15.32

Hosts

  • Fraxinus, Platanus (failure rare) spp also Malus, Juglans, Ulmus, Acer

 

 

Significance

  • Simultaneous white rot
  • Brittle fracture
  • Occ. Soft rot or white rot mode
  • Decay varies w. species
  • Splitting of wood through delignification depends on lignin content of species
  • Forms canker to breach barrier zone
  • Strong poss. of fracture in Fraxinus

 

Ident Features

  • Brackets
  • Upper-domed orange-rust, short dense hairs, darkening to black and bristly
  • Lower- flat pore bearing flesh and tubes similar colour
  • Located in depressed strips tissue

 

 

 

<< PART 3 OF 8   PART 5 OF 8 >>

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