Index Catalog // ScholarsArchive@OSU

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:: . The disease persisted from year to year but fluc- tuated in severity and hop production was not

Bionomics of the hop cyst nematode, Heterodera humuli Filipjev, 1934 (Nematoda : Heteroderidae)

Creator:: Sen, Arun Kumar
Abstract:: The hop cyst nematode, Heterodera humuli Filipjev, 1934 was first reported from Europe in 1894, however, very little is known with respect to the biology and economic importance of this pest. Abundant material from Oregon hop yards provided an excellent opportunity to add additional details concerning the bionomics of this...
Resource Type:: Dissertation
Full Text:: economic importance of this pest. Abundant material from Oregon hop yards provided an excellent

Evaluation of assay systems for the determination of susceptibility of the hop (Humulus lupulus) to Verticillium wilt caused by Verticillium dahliae

Creator:: Shufelt, Eileen Marie
Abstract:: A rapid and reliable assay is needed to evaluate hop resistance to Verticillium wilt caused by Verticillium dahliae. Assays used in the past are laborious, require long incubation periods, and usually produce mild symptoms which are difficult to evaluate and are often not consistent. A study comparing several methods for...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: Dr. Robert G. Linderman A rapid and reliable assay is needed to evaluate hop

Hop cone tip blight : a new disease in the Pacific Northwest

Creator:: Bienapfl, John C.
Abstract:: A necrosis at the tip of cones was observed on hop (Humulus lupulus), cultivar "Nugget", grown in Oregon in the early 1990's. Fusarium sambucinum and F. avenaceum were recovered from symptomatic cones in 1998 and preliminary inoculation experiments suggested both Fusarium species could cause hop cone necrosis. Studies were carried...
Resource Type:: Masters Thesis
Full Text:: canker disease was initially observed in European hop fields and first described in 1902, but was likely

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:: July 23, 2007. Title: Understanding Sporulation and Dissemination of Podosphaera macularis, Hop

Examinations of Fusarium sambucinum on Humulus lupulus and co-infection with hop stunt viroid in commercial hop fields

Creator:: Cerruti, Natasha R.
Abstract:: After an unusually high incidence of Fusarium canker was observed in commercial hop fields of the Pacific Northwest, field surveys were conducted and revealed that canker incidence ranged from 20 to 60% of bines sampled in six commercial fields, as well as wide-spread Hop stunt viroid infection in these six...
Resource Type:: Masters Thesis
Full Text:: and a significant decrease in cone yields. This stunting disease was described as hop stunt in 1973

Examination of necrotic fleck-diseased Lilium longiflorum

Creator:: Lyons, Alan Robert
Resource Type:: Masters Thesis
Full Text:: antisera and infected lily sap. More information on the necrotic fleck disease on lilies has been

Relation of boron to cherry rosette disease in Oregon, and the possible implication in Oregon, and the possible implication of a virus

Creator:: Bolwyn, Bart
Abstract:: A disease of sweet cherry (Prunus avium L.) known as "cherry rosette" has threatened production of cherries in Oregon. In 1961 this disease was observed in widely separated orchards. Rosette occurred in isolated trees or in spreading patterns, often from identified single trees or from one section of an orchard....
Resource Type:: Dissertation
Full Text:: Relation of boron to cherry rosette disease in Oregon, and

Nature of resistance to Verticillium dahliae Kleb. in strains of peppermint (Mentha piperita L.) developed by irradiation

Creator:: Sherrod, Leslie Lynn, 1940-
Abstract:: Verticillium dahliae Kleb. causes a wilt disease of peppermint. Attempts to control the disease by soil fumigation, crop rotation, flaming of stubble, and deep plowing have met with only limited success. Development of resistant varieties through conventional breeding procedures is difficult because commercial peppermint is male-sterile. Several strains of commercial...
Resource Type:: Dissertation
Full Text:: helps prevent spread and increase of the disease but, again, is not a completely effective control

Production of polygalacturonase and macerating enzymes by Phoma menthae

Creator:: Melouk, Hassan Aly
Abstract:: The fungus Phoma menthae Strasser causes black lesions and cankers on stems and rhizomes of Mentha piperita L. The purpose of this thesis was to: 1) study the production of polygalacturonase (PG) and macerating enzymes (ME) by P. menthae in vivo and in vitro, 2) study the effects of phenolic...
Resource Type:: Dissertation
Full Text:: cankers on stems and rhizomes of peppermint. The disease occurs on both field and greenhouse grown

ScholarsArchive@OSU

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

Bionomics of the hop cyst nematode, Heterodera humuli Filipjev, 1934 (Nematoda : Heteroderidae)

Evaluation of assay systems for the determination of susceptibility of the hop (Humulus lupulus) to Verticillium wilt caused by Verticillium dahliae

Hop cone tip blight : a new disease in the Pacific Northwest

Understanding sporulation and dissemination of Podosphaera macularis, hop powdery mildew

Examinations of Fusarium sambucinum on Humulus lupulus and co-infection with hop stunt viroid in commercial hop fields

Examination of necrotic fleck-diseased Lilium longiflorum

Relation of boron to cherry rosette disease in Oregon, and the possible implication in Oregon, and the possible implication of a virus

Nature of resistance to Verticillium dahliae Kleb. in strains of peppermint (Mentha piperita L.) developed by irradiation

Production of polygalacturonase and macerating enzymes by Phoma menthae

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Creator

Date

Decade

Degree Field

Degree Level

Degree Name

File Format

Language

License

Location

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search