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Principle decay causing fungi in trees (part 5 of 8)

Pleurotus ostreatus (Oyster Mushroom)

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Hosts

  • Fagus, Aesculus, Populus spp

 

Significance

  • Early delignification in springwood
  • Cracking across grain in Populus
  • Develops to intense white rot
  • Severe decay little strength
  • Decay localised

 

Ident Features

  • Soft, fleshy fan
  • Upper-dark blue grey maturing to brown/fawn with cracking
  • Lower- white gills running down stipe becoming yellowish when maturing

 

 

 

Inonotus radiatus

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Hosts

  • Alnus spp

 

Significance

  • Simultaneous white rot
  • Brittle fracture
  • Occ. Soft rot or white rot mode

 

Ident Features

  • Woody brackets-in tiers
  • Upper-glabrous, uneven radially wrinkled orange-rust darkening to black
  • Lower- circular pores, silvery; flesh and tubes rusty colour

 

 

 

Diatrype disciformis

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Hosts

  • Fagus spp, deciduous trees

 

Significance

  • White rot
  • Saprophyte

 

Ident Features

  • Discs 1-3mm across
  • Whitish darkening to black, white fleshed

 

 

 

Bulgaria inquinans (Black Bulgar, Pope’s Buttons)

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Hosts

  • Quercus spp, deciduous trees, less common on Fagus

 

Significance

  • Saprophytic

 

Ident Features

  • Brownish rubbery, globose, inrolled margin expanding to black flat discs
  • No pimples on disc (Exidia glandulosa has pimples)

 

 

 

Coriolus versicolor (Many-zoned Bracket)

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Hosts

  • Fagus, Rosaceous spp, deciduous trees

 

Significance

  • Very common esp. after Chondrostereum purpureum
  • White rot of sapwood, occ. kills cambium
  • Rot not extensive
  • Brittle fracture of small limbs
  • Occ. other fungi colonise so detailed inspection
  • C. hirtusa (hairy upper, round pores) similar on sun scorched trees, often seen w. Schizophyllum commune

 

Ident Features

  • Thin, leathery bracket in clusters
  • Semi-circular, flattened
  • Alternating light & dark zones
  • Wavy lobed margin

 
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