Index Catalog // ScholarsArchive@OSU

Water deficit stress effects on bacterial ring rot of potato caused by Clavibacter michiganensis subsp. sepedonicus

Creator:: Crabtree, Kristine L.
Abstract:: Population size of Clavibacter michiganensis subsp. sepedonicus in potato cv Russet Burbank and plant response as affected by drought were assessed in a greenhouse experiment. Water deficit stress and no stress treatments, and inoculum densities of 0 or 2 X 10⁷ cfu C. m. sepedonicus/seed piece were arranged factorially. Stem...
Resource Type:: Masters Thesis
Full Text:: expression 13 Disease detection and diagnosis 16 Epidemiology and disease management 19 Conclusion

Viability and infective potential of Phytophthora pini zoospores in a recirculating irrigation system

Creator:: Shay, Sarah D.
Abstract:: Phytophthora pini Leonian, recently re-established from P. citricola I, is a pathogen with a wide range of forest and nursery hosts. It causes foliar infections in horticultural nurseries in Oregon, where recirculating irrigation systems are common. Increased use of recirculating irrigation systems may contribute to disease caused by waterborne plant...
Resource Type:: Masters Thesis
Full Text:: utilized to investigate the relationship between Phytophthora pini zoospore inoculum dose and disease on

Verticillium wilt of hops : pathogenicity, host range, and temperature relations of the causal agents

Creator:: Zehsazian, Hassan
Abstract:: Verticillium wilt of hops in Oregon, caused by Verticillium dahliae Kleb., was first reported in 1956. Later, V. albo-atrum Reinke & Berth. was also isolated from infected hop plants, and thus both species of the fungus were shown to be the causal agents of the disease in Oregon. The purpose...
Resource Type:: Dissertation
Full Text:: of the disease in Oregon. The purpose of this research was to study temperature rela- tions and

Understanding sporulation and dissemination of Podosphaera macularis, hop powdery mildew

Creator:: Peetz, Amy B.
Abstract:: Podosphaera macularis causes one of the most important diseases, powdery mildew, of Humulus lupulus (hop). If left unmanaged, hop powdery mildew can cause total crop loss due to disease or browning of hop cones rendering the cones unmarketable to buyers. The Hop Powdery Mildew Infection Risk Index (HOPS) is heavily...
Resource Type:: Masters Thesis
Full Text:: disease pressure. The effects of constant exposure (5, 10, 15, 20, 25, 30, and 35°C) and 6 hr

Understanding Host-Pathogen Interactions in the Sphaerulina musiva-Populus Pathosystem

Creator:: Dunnell, Kelsey Liann
Abstract:: Host-parasite interactions between the pathogen, Sphaerulina musiva, and its host, Populus spp., were examined in a series of studies. In the first study, variation in resistance of Populus nigra from 7 locations in Europe was differentiated based on the parameters cankers per cm and disease severity score. The analysis evaluated...
Resource Type:: Dissertation
Full Text:: locations in Europe was differentiated based on the parameters cankers per cm and disease severity score

Tree vigor and the susceptibility of Douglas-fir to armillaria root disease

Creator:: Rosso, Pablo H.
Abstract:: The main objective of this thesis was to determine the influence of tree vigor on susceptibility to Armillaria root disease. First, the effect of thinning, fertilizing and pruning on tree vigor of four young Douglas-fir (Pseudo tsuga menziesii var. menziesi,) plantations was explored. Tree vigor was calculated by measuring wood...
Resource Type:: Masters Thesis

Transposon-induced nutritional and virulence mutants in two pathovars of Pseudomonas syringae

Creator:: Anderson, Dirk M.
Resource Type:: Masters Thesis
Full Text:: brown spot disease of bush bean was helpful. The suggestions of Drs. Mary Powelson and Larry Moore

Transcript analysis of Feldmannia Sp. virus, FsV : characterization of the major capsid protein gene and its relationship to known viruses

Creator:: Jia, Yibing
Abstract:: The Feldmannia sp. virus is a large icosahedral virus that persistently infects marine brown alga Feldmannia sp.. So far, there is no information available about viral genome replication, gene structure and gene expression in this unique viral-host system. The purpose of this study was to characterize the general features of...
Resource Type:: Masters Thesis
Full Text:: iridoviruses, fish lymphocystis disease virus, frog virus 3, and with African swine fever virus. Redacted

The use of flowering crab apples for the detection of latent viruses in apples

Creator:: Reynolds, James Edward
Abstract:: Recent investigations indicate that several latent viruses of apples exist in common commercial apple stocks, but these viruses and their relationships are incompletely understood. This thesis describes investigations of crab apples as indicators of latent viruses of apples. Eighty-eight varieties and species of crab apples were tested as indicators of...
Resource Type:: Dissertation
Full Text:: rrlore rapidly and carne into bearing at a younger age than did those infected with the disease. Mink

The roles of Verticillium dahliae, Colletotrichum atramentarium, Erwinia carotovora subsp. carotovora and E. carotovora subsp. atroseptica in "early dying" disease of potatoes

Creator:: Kirkland, Marjorie Lynn
Abstract:: The primary cause of "early dying" disease of potatoes in Oregon is Verticillium dahliae; however, Colletotrichum atramentarium, Erwinia carotovora subsp. carotovora (Ecc) and E. carotovora subsp. atroseptica (Eca) are also commonly isolated from diseased plants. Therefore, field and greenhouse studies were initiated to determine the relative involvement of each pathogen,...
Resource Type:: Masters Thesis
Full Text:: experiments 17 Greenhouse experiment 18 III. Results 19 Field Experiments 19 Disease, plant infection and

ScholarsArchive@OSU

Water deficit stress effects on bacterial ring rot of potato caused by Clavibacter michiganensis subsp. sepedonicus

Viability and infective potential of Phytophthora pini zoospores in a recirculating irrigation system

Verticillium wilt of hops : pathogenicity, host range, and temperature relations of the causal agents

Understanding sporulation and dissemination of Podosphaera macularis, hop powdery mildew

Understanding Host-Pathogen Interactions in the Sphaerulina musiva-Populus Pathosystem

Tree vigor and the susceptibility of Douglas-fir to armillaria root disease

Transposon-induced nutritional and virulence mutants in two pathovars of Pseudomonas syringae

Transcript analysis of Feldmannia Sp. virus, FsV : characterization of the major capsid protein gene and its relationship to known viruses

The use of flowering crab apples for the detection of latent viruses in apples

The roles of Verticillium dahliae, Colletotrichum atramentarium, Erwinia carotovora subsp. carotovora and E. carotovora subsp. atroseptica in "early dying" disease of potatoes

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