Reducing the impact of stem decay pathogens in the Pacific Northwest - PowerPoint PPT Presentation

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Reducing the impact of stem decay pathogens in the Pacific Northwest

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Reducing the impact of stem decay pathogens in the Pacific Northwest. Brad Collins ... Borax. Urea. Phlebia gigantea (biological control) Planting strategies ... – PowerPoint PPT presentation

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Title: Reducing the impact of stem decay pathogens in the Pacific Northwest


1
Reducing the impact of stem decay pathogens in
the Pacific Northwest
  • Brad Collins

2
Significance of decay in forests
  • Ecological
  • Wildlife habitat
  • Create gaps
  • Nutrient cycling
  • Influence succession
  • Economical
  • Tree mortality
  • Wood damage
  • Predisposing trees to breakage

3
Three important decay fungi in PNW
  • Echinodontium tinctorium (Indian paint fungus)
  • Phellinus pini (Red ring rot)
  • Heterobasidion annosum (Annosus rot)

4
Modes of entry of pathogen
  • H. annosum
  • Spores on stumps and wounds
  • Spread through roots to other trees
  • P. pini E. tinctorium
  • Spores on branch stubs and wounds

Result enzymatic decay of wood tissue
5
Effective control practices
  • Site preparation
  • Planting strategies
  • Stand management

Successful control requires and integrative
approach
6
Site preparation
  • Site quality (climate, inoculum present)
  • cool, moist, shady fungi!
  • Removing stumps root fragments
  • Trenching
  • Treating stumps
  • Borax
  • Urea
  • Phlebia gigantea (biological control)

7
Planting strategies
  • Planting non-host species (or mixed)
  • Lower planting densities reduces shaded-out
    branches

8
Stand management
  • Monitor and remove symptomatic trees
  • Even-age for E. tinctorium, uneven-age for P.
    pini
  • Minimize wounding during harvest
  • Watch out for bark beetles!
  • Pathological rotation
  • Remember we cant completely eradicatejust
    keep them in check

9
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