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Role of inoculum sources of Botrytis cinerea in the epidemiology of gray mold of snap beans

Creator:: Johnson, Kenneth Bjorn
Abstract:: Spore dispersal gradients and pod disease gradients from point inoculum sources of Botrytis cinerea were measured over time in two snap bean field experiments. Laboratory grown inoculum was placed at ground level in a 30 x 30 cm square at bloom initiation and removed at full bloom. Dispersal of inoculum,...
Resource Type:: Masters Thesis
Full Text:: epidemiology of gray mold of snap beans AN ABSTRACT OF THE THESIS OF Kenneth Bjorn Johnson for the degree of

Spatiotemporal Assessment of Crop Histories in the Pacific Northwest

Creator:: Kumbhakar, Ishika G.
Abstract:: The cultivated potato (Solanum tuberosum) is one of the most important food crops in the United States, as well as globally. As demand rises, growers in the Pacific Northwest are revisiting their crop management strategies to determine whether there are additional ways to enhance crop productivity while managing plant and...
Resource Type:: Masters Thesis
Full Text:: :______________________________________________________________ Kenneth Frost The cultivated potato (Solanum tuberosum) is one of the most

Effect of resident epiphytic fungi development of brown rot blossom blight of stone fruits

Creator:: Wittig, Hans P. P.
Abstract:: Antagonistic effects of Epicoccum purpurascens, Aureobasidium pullulans, Trichoderma spp., and Botrytis cinerea on establishment of Monilinia fructicola infections in cherry and peach blossoms were assessed in field and mist chamber studies. Conidia of each fungus were applied to blossoms that were subsequently inoculated with conidia of M fructicola. Mist chamber...
Resource Type:: Masters Thesis
Full Text:: Epiphytic Fungi on Development of Brown Rot Blossom Blight of Stone Fits. Redacted for Privacy Kenneth B

Modification of phyllosphere environments to enhance establishment of Gliocladium roseum, an antagonist of Botrytis cinerea

Creator:: Bennett, Robert J. (Robert Joe), 1953-
Abstract:: Radial colony growth of three isolates of Gliocladium roseum and three isolates of Bottytis cinerea were measured on 1/4 strength potato dextrose agar amended with concentrations of NaHCO₃ ranging from 0-2% (w/v). Compared to the control, reductions in colony diameter of the B. cinerea isolates ranged from 60-79% and 73-89%...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Robert J. Bennett for the degree

Diversity and Impact of Soft Rot Pathogens of Potato in the Columbia Basin

Creator:: Brazil, Jessie A.
Abstract:: Bacterial soft rot of potato (Solanum tuberosum), caused by Pectobacterium and Dickeya species, is among the most common and destructive potato diseases in the United States. These pathogens cause a variety of vascular wilts, and in potato cause a disease complex that includes tuber soft rot, blackleg, aerial stem rot,...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ Kenneth Frost Bacterial soft rot of potato (Solanum tuberosum), caused by Pectobacterium

Evaluation of kasugamycin-use strategies designed to delay development of resistance in Erwinia amylovora

Creator:: Hubbard, Andrew Robert
Abstract:: The antibiotics, streptomycin sulfate and oxytetracycline, are used widely for fire blight suppression in the Pacific Northwest region of the United States. The efficacy of streptomycin, however, is compromised by widespread streptomycin-resistance in E. amylovora populations, and oxytetracycline is only partially effective. Consequently, for several years, the aminoglycoside antibiotic, kasugamycin...
Resource Type:: Masters Thesis
Full Text:: approved: ______________________________________________________ Kenneth B. Johnson The

Epiphytic yeasts isolated from apple leaves to control of gray and blue mold fruit rots of apple

Creator:: Falconi, Cesar E.
Abstract:: Eight phylloplane yeasts were isolated from backyard apple trees in Corvallis, OR. Yeast isolates were classified to genus or species level. All isolates were tested in vitro for antagonistic activity against the postharvest pathogens Botrytis cinerea and Penicillium expansum. Of these isolates, Aureobasidium pullulans, Sporobolomyces roseus Rhodotorula sp., consistently reduced...
Resource Type:: Masters Thesis
Full Text:: would also wish to thank my committee members, Dr. D. Richardson, Dr. D. Sugar, and Dr. J. Stone for

Assessment of potato tuber blight caused by Phytophthora infestans

Creator:: Glass, Jenny Rebecca
Abstract:: Late blight, caused by Phytophthora infestans, is a devastating problem to potato production in many parts of the world. While the foliar phases of this disease are well characterized, tuber infection, leading to quality losses and disease perpetuation, is less well understood. Experiments were conducted during 1998 and 1999 in...
Resource Type:: Masters Thesis
Full Text:: Redacted for privacy Redacted for privacy ACKNOWLEDGMENTS I thank Kenneth B. Johnson, Teresa Sawyer

Evaluation of hop (Humulus lupulus L.) protoplast inoculation with Prunus necrotic ringspot virus

Creator:: Jochimsen, Kenneth N.
Abstract:: Hop tissue (Humulus lupulus L.) was grown in vitro in callus, suspension, and protoplast cultures. Medium components were evaluated for optimal callus growth. Solid Murashige and Skoog (MS) medium with picloram at 1.5 uM, 6-benzylaminopurine (BAP) at 10 uM, 1 g/1 casein hydrolysate, and 100 mg/1 citric acid induced white,...
Resource Type:: Masters Thesis
Full Text:: inoculation with Prunus necrotic ringspot virus AN ABSTRACT OF THE THESIS OF Kenneth N. aochimsen for the

Scratching the Surface of the Potato Geocaulosphere: Characterizing the Microbiome of Seed Tuber Tare Soil and its Impact on the Rhizosphere Microbiome

Creator:: Delventhal, Kayla D.
Abstract:: For tuberizing crops like potato (Solanum tuberosum), the geocaulosphere, or the zone of soil in contact with and influenced by the tuber, is a distinct sphere of microbial life and represents an important interface between the potato crop and the soil environment. Upon potato harvest, specific geocaulosphere soil called tare...
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________________________________ Kenneth Frost Posy Busby For tuberizing crops like potato (Solanum tuberosum), the

ScholarsArchive@OSU

Role of inoculum sources of Botrytis cinerea in the epidemiology of gray mold of snap beans

Spatiotemporal Assessment of Crop Histories in the Pacific Northwest

Effect of resident epiphytic fungi development of brown rot blossom blight of stone fruits

Modification of phyllosphere environments to enhance establishment of Gliocladium roseum, an antagonist of Botrytis cinerea

Diversity and Impact of Soft Rot Pathogens of Potato in the Columbia Basin

Evaluation of kasugamycin-use strategies designed to delay development of resistance in Erwinia amylovora

Epiphytic yeasts isolated from apple leaves to control of gray and blue mold fruit rots of apple

Assessment of potato tuber blight caused by Phytophthora infestans

Evaluation of hop (Humulus lupulus L.) protoplast inoculation with Prunus necrotic ringspot virus

Scratching the Surface of the Potato Geocaulosphere: Characterizing the Microbiome of Seed Tuber Tare Soil and its Impact on the Rhizosphere Microbiome

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