Presentation on theme: "Reducing the impact of stem decay pathogens in the Pacific Northwest Brad Collins."— Presentation transcript:
Reducing the impact of stem decay pathogens in the Pacific Northwest Brad Collins
Significance of decay in forests Ecological Wildlife habitat Create gaps Nutrient cycling Influence succession Economical Tree mortality Wood damage Predisposing trees to breakage
Three important decay fungi in PNW Echinodontium tinctorium (Indian paint fungus) Phellinus pini (Red ring rot) Heterobasidion annosum (Annosus rot)
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
Effective control practices Site preparation Planting strategies Stand management Successful control requires and integrative approach…
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 can’t completely eradicate…just keep them in check
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