Nonspecific root decline in Douglas-fir trees due to urban soils syndrome Public Deposited

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  • Urban soils syndrome, the deterioration of soil at developed sites, acts as a primary disease agent, causing root system necrosis by physical damage to root tissue. This condition predisposes Douglas-fir trees to attack by fungal pathogens, including Armillaria ostoyae, brown rotters like Phaeolus schweinitzii, and a variety of minor pathogens. When colonized by minor pathogens, or when damaged by edaphic factors alone, the resulting diseased condition is a non-specific root decline. This paper examines the soil conditions that contribute to root disorders. The role of minor pathogens is explored. Nonspecific root decline is difficult to detect, for many affected trees appear nonsymptomatic until they uproot in a windstorm. Sampling techniques are discussed, and a hazard rating system is proposed to help with detection.
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-08-07T20:45:49Z (GMT) No. of bitstreams: 1 TorresPeter1997.pdf: 1327921 bytes, checksum: 9ce02f1b68fc6a602fb49170c8226a5c (MD5)
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  • description.provenance : Submitted by Patricia Black (patricia.black@oregonstate.edu) on 2012-08-07T17:37:13Z No. of bitstreams: 1 TorresPeter1997.pdf: 1327921 bytes, checksum: 9ce02f1b68fc6a602fb49170c8226a5c (MD5)

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