Index Catalog // ScholarsArchive@OSU

The relation of soil characteristics to growth and distribution of Chamaecyparis lawsoniana and Thuja plicata in southwestern Oregon

Creator:: Imper, David Kimberly
Abstract:: Twelve plots at six sites in southwestern Oregon were studied to determine the degree to which various soil characteristics are related to the occurrence and growth of Chamaecyparis lawsoniana and Thuja plicata. Soil profiles and vegetation were described in each plot, and measurements were made of insolation, soil and litter...
Resource Type:: Masters Thesis
Full Text:: -on-ignition, and concentra- tions of nitrate, ammonium and total N. Nitrate and ammonium

Epidemic Dynamics of Sudden Oak Death in the Forests of Oregon

Creator:: Carson, Adam
Abstract:: Sudden Oak Death (SOD) is a forest disease caused by the oomycete pathogen Phytophthora ramorum, and infects trees in the Western United States and Europe. This generalist pathogen can infect over 130 species of plants, and causes rapid mortality in tree species in the Fagaceae. Sexual reproduction is thought to...
Resource Type:: Masters Thesis
Full Text:: research sites, half of which (n =15) received an herbicide treatment and half of which (n = 15) remained

Biology and management of Meloidogyne chitwoodi using oxamyl on potato in the western United States

Creator:: David, Nicholas L.
Abstract:: Field trials were conducted during 2001 to 2003 to investigate soil population dynamics of Meloidogyne chitwoodi, tuber symptom suppression using oxamyl, and post-harvest tuber symptom development on short-season potato varieties Russet Norkotah and Russet Nugget (San Luis Valley only). The experiments were located in the San Luis Valley in Colorado,...
Resource Type:: Dissertation
Full Text:: Helminthological Society of Washington 36:88-92. Griffin, G.D., R.N. Inserra, and N. Vovlas. 1984. Rangeland

Diagnosis and Etiology of a Soilborne Disease Complex of Winter Squash (Cucurbita maxima) in the Willamette Valley, OR

Creator:: Rivedal, Hannah M.
Abstract:: Winter squash (Cucurbita maxima) grown in Oregon’s Willamette Valley for edible seed, frozen foods, and fresh markets is susceptible to an undiagnosed soilborne disease. Diseased squash fields exhibit symptoms of stunting, root and crown rot, vascular discoloration, and late-season wilt, which in extreme cases can lead to total crop failure....
Resource Type:: Dissertation
Full Text:: subset of collected fungal isolates (n = 241) were characterized with phylogenetic analyses of the ITS

The nature of Fusarium exclusion from coniferous forest soils : evidence of differential microbial involvement in forest vs. nursery soils

Creator:: Schisler, David Albert
Resource Type:: Masters Thesis
Full Text:: . r.V. VA NAM N. I'M V.V.V. &yew, 7AA'A WAWA leaYeiYA &WA%YA &TAW/ WON FAVAM 1 CAlin AAv&Y 474 ow

Forecasting Pseudocercosporella herpotrichoides foot rot of winter wheat

Creator:: Grybauskas, Arvydas P.
Abstract:: The use of fungicides for the control of foot rot of winter wheat, caused by Pseudocercosporella herpotrichoides (Fron) Dei., requires a forecast of disease risk to optimize this management practice ecologically and economically. Foot rot occurs in both the mild, wet (100+ cm, ppt./year) annual cropped areas in western Oregon,...
Resource Type:: Dissertation
Full Text:: fungal growth (Griffin, 1977). Most researchers check for specific solute effects through graphical

Biology of chlamydospores of Phytophthora ramorum

Creator:: Smith, Aaron Lee
Abstract:: The chlamydospore is a survival spore produced by 35 of the 75 described species of Phytophthora. Phytophthora ramorum Werres, de Cock & Man in't Veld, the causal agent of Sudden Oak Death (SOD), produces abundant chlamydospores in artificial culture and plant tissue. The chlamydospore is likely the most important survival...
Resource Type:: Masters Thesis
Full Text:: Phytophthora species are in the phylum Oomyc brown algae (Phaeophyceae) and are therefore n members of the

The effects of Phytophthora ramorum infection on hydraulic conductivity and tylosis formation in tanoak sapwood

Creator:: Collins, Bradley R.
Abstract:: Tanoak (Lithocarpus densiflorus), along with some other members of Fagaceae, are susceptible to sudden oak death caused by the oomycete Phytophthora ramorum. Symptoms of the disease include dying crowns, bleeding cankers, and eventually death of infected trees. The cause of mortality is not well understood, but recent research indicates that...
Resource Type:: Masters Thesis
Full Text:: pathogens more quickly than non-water stressed trees (Manion & Griffin, 1992). In fact, mortality of trees

Effect of soil water pressures on population dynamics of Fusarium equiseti, Glocladium virens, Talaromyces flavus and Trichoderma viride, biocontrol agents of Verticillium dahliae in potatoes

Creator:: Hussain, Shaukat
Resource Type:: Masters Thesis
Full Text:: root diseases have been well documented (Cook and Papendick, 1971; Griffin, 1963; Griffin, 1969

Insights into the pathology and epidemiology of Phytophthora ramorum, causal agent of sudden oak death

Creator:: Daniels, Hazel A.
Abstract:: Sudden oak death is caused by the clonally reproducing generalist oomycete Phytophthora ramorum. The pathogen can infect more than 130 different plant hosts including Quercus spp., Larix kaempferi, and Notholithocarpus densiflorus, as well as common nursery genera such as Rhododendron and Camelia, where it causes symptoms ranging from bleeding cankers...
Resource Type:: Dissertation
Full Text:: grouped for separate analyses: EU1 & NA1 Mixed Group (n = 88) includes EU1, EU1 Resample (before

ScholarsArchive@OSU

The relation of soil characteristics to growth and distribution of Chamaecyparis lawsoniana and Thuja plicata in southwestern Oregon

Epidemic Dynamics of Sudden Oak Death in the Forests of Oregon

Biology and management of Meloidogyne chitwoodi using oxamyl on potato in the western United States

Diagnosis and Etiology of a Soilborne Disease Complex of Winter Squash (Cucurbita maxima) in the Willamette Valley, OR

The nature of Fusarium exclusion from coniferous forest soils : evidence of differential microbial involvement in forest vs. nursery soils

Forecasting Pseudocercosporella herpotrichoides foot rot of winter wheat

Biology of chlamydospores of Phytophthora ramorum

The effects of Phytophthora ramorum infection on hydraulic conductivity and tylosis formation in tanoak sapwood

Effect of soil water pressures on population dynamics of Fusarium equiseti, Glocladium virens, Talaromyces flavus and Trichoderma viride, biocontrol agents of Verticillium dahliae in potatoes

Insights into the pathology and epidemiology of Phytophthora ramorum, causal agent of sudden oak death

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