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Differential transmission of strawberry mottle virus by Chaetosiphon thomas Hille Ris Lambers and Chaetosiphon fragaefolii (Cockerell)

Creator:: Eulensen, Gustav Egon
Abstract:: The transmission of strawberry mottle virus (SMV) to Fragaria vesca L. by Chaetosiphon thomasi and C. fragaefolii was studied to determine differences between the two species. Acquisition, inoculation, and retention phases of transmission were described. In all phases, C. fragaefolii was found to be the more efficient vector. Mean transmission...
Resource Type:: Masters Thesis
Full Text:: . Plant Disease Reporter, 52: 64-67. Frazier, N. W. and A. F. Posnette. 1958. Relationships of the straw

Effects of volatile fungicides on Sphaerotheca pannosa on rose

Creator:: Gallian, John J.
Resource Type:: Dissertation
Full Text:: chambers for maintaining powdery mildew cultures and disease-free leaf tissue. . 4. Residual fungicide

Purification and partial characterization of a virus associated with korogwe leaf spot disease of sisal

Creator:: Mpunami, Anatolia
Abstract:: Sisal Wave sisalana Perrine), one of Tanzania's main cashcrops, is severely affected by korogwe leaf spot disease (KLS).Infected plants show chocolate brown, concentric, scablike eruptions on both surfaces of mature leaves, and produce stained, low-quality fiber. A flexuous, rod-shaped virus was isolated from KLS-infected sisal leaves and studied at Oregon...
Resource Type:: Masters Thesis
Full Text:: : Purification and Partial Characterization of a Virus Associated with Kongwe Leaf Spot Disease of Sisal

Mineral nutrition, pyruvate kinase activity, and protein concentration in 'd'Anjou' pear fruit affected by cork spot

Creator:: Bevacqua, Robert Francis
Resource Type:: Dissertation
Full Text:: Nutrition, Pyruvate Kinase Activity, and Protein Ooncentraticri in 'd'Anjou' Pear Fruit Affected by Pork

Pathogenic specialization and heterothallism in Sphaerotheca pannosa var. rosae

Creator:: Bender, Carol Lavane
Abstract:: Studies were conducted on pathogenic specialization and heterothallism in Sphaerotheca pannosa var. rosae, causal agent of rose powdery mildew. Methods were developed for isolation and identification of Sphaerotheca pannosa var. rosae races on rose. Monoconidial isolates were initiated on detached leaves, increased on host plants, and inoculated to rose cultivars...
Resource Type:: Masters Thesis
Full Text:: Wor., is a serious disease problem on roses grown for the cut-flower market. The mechanisms and ex

Suppression of take-all [Gaeumannomyces graminis (Sacc.) Arx & Olivier var. tritici Walker] of wheat (Triticum aestivum L.) by banded ammonium and chloride fertilizers

Creator:: Halsey, Mark Evan
Resource Type:: Dissertation
Full Text:: depends on soil nitrification rates and the timing of N application to avoid increased disease severity

The influence of antitranspirant and calcium sprays on calcium distribution and tipburn in cabbage (Brassica oleracea var. capitata) and lettuce (Lactuca sativa L.)

Creator:: Chen, Yung-Wu
Abstract:: Tipburn is a widespread physiological disorder of cabbage and lettuce, caused by calcium deficiency. Symptoms of tipburn are necrosis on margins of outer and inner head leaves in lettuce, whereas in cabbage it is only on margins of inner leaves. Tipburn on outer leaves may develop early, but symptoms remain...
Resource Type:: Masters Thesis
Full Text:: United States, in both field and greenhouse. Tipburn is also a serious disease in tropical and

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

Brown rot of sweet cherry in western Oregon

Creator:: Gashaira, Bashir
Resource Type:: Dissertation
Full Text:: . Severe out- breaks of the disease occur during bloom and harvest whenever high levels of inoculum

Insects associated with black stain root disease of Douglas-fir in western Oregon

Creator:: Witcosky, Jeffrey John
Abstract:: The root systems of Douglas-fir trees infected with Verticicladiella wagenerii and assigned by crown color and terminal growth characteristics to several stages of decline were excavated at three widely separated sites in the Coast Range of Oregon. Data were gathered on insect species present, extent of colonization of the root...
Resource Type:: Masters Thesis
Full Text:: . nigrinus, P. fasciatus, and S. carinatus potential vectors of black stain root disease in Douglas-fir

ScholarsArchive@OSU

Differential transmission of strawberry mottle virus by Chaetosiphon thomas Hille Ris Lambers and Chaetosiphon fragaefolii (Cockerell)

Effects of volatile fungicides on Sphaerotheca pannosa on rose

Purification and partial characterization of a virus associated with korogwe leaf spot disease of sisal

Mineral nutrition, pyruvate kinase activity, and protein concentration in 'd'Anjou' pear fruit affected by cork spot

Pathogenic specialization and heterothallism in Sphaerotheca pannosa var. rosae

Suppression of take-all [Gaeumannomyces graminis (Sacc.) Arx & Olivier var. tritici Walker] of wheat (Triticum aestivum L.) by banded ammonium and chloride fertilizers

The influence of antitranspirant and calcium sprays on calcium distribution and tipburn in cabbage (Brassica oleracea var. capitata) and lettuce (Lactuca sativa L.)

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

Brown rot of sweet cherry in western Oregon

Insects associated with black stain root disease of Douglas-fir in western Oregon

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