Index Catalog // ScholarsArchive@OSU

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

Control of Black Vine Weevil in Hop

Creator:: Dorschner, K. W. and Baird, Craig R.
Resource Type:: Conference Proceeding
Full Text:: CONTROL OF BLACK VINE WEEVIL IN HOP K. W. Dorschner and C. R. Baird SW Idaho Research and Extension

Powdery mildew (Podosphaera macularis Braun & Takamatsu) resistance in wild hop genetic resources

Creator:: Smith, Jodi M.
Abstract:: Hop powdery mildew, caused by Podosphaera macularis Braun & Takamatsu (formerly Sphaerotheca macularis (Wallr. :Fr.) Lind, syn. S. humuli (DC.)Burrill) was not observed in Pacific Northwest hop yards until 1997, when it was discovered in Washington. Within one year, it had spread to Oregon and Idaho. This emerging disease caused...
Resource Type:: Masters Thesis

Hop Pest Management Program

Creator:: Mayer, Daniel F.
Resource Type:: Conference Proceeding
Full Text:: -Temik yards. HOP PEST MANAGEMENT PROGRAM Daniel F. Mayer Washington State University - IAREC, Prosser

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

Investigation of hop downy mildew through association mapping and observations of the oospore

Creator:: Parker, Thomas B.
Abstract:: Hop downy mildew is a devastating disease affecting hop requiring expensive fungicide applications throughout the growing season. Plant resistance is highly desirable and theorized as being decidedly quantitative with dominance and epistasis involved in resistance. An association mapping approach using a mixed-model was used to identify AFLP markers associated with...
Resource Type:: Dissertation
Full Text:: of hop downy mildew in the United States……………………………….... 1 Disease importance and

Tactics for enhancing conservation biological control of twospotted spider mites, Tetranychus urticae Koch, in Pacific Northwest hop yards

Creator:: Woods, Joanna L.
Abstract:: The twospotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae), is a worldwide pest of numerous agronomic and horticultural plants. Conservation biological control of this pest can be unreliable due to asynchrony of natural enemies and certain horticultural practices that have a direct or indirect affect on natural enemies and the...
Resource Type:: Masters Thesis
Full Text:: between hop rows and pest and predator levels were assessed on the hop plants over three growing

Screening for Viral Disease in the OSU Tomato Breeding Program

Creator:: Kershner, Alexandria C.
Abstract:: Disease control is a crucial aspect of plant breeding for researchers as well as commercial producers. After samples from OSU's tomato breeding program tested positive for Columnea latent viroid in a screen done by a private company, secondary testing was done by the USDA laboratory in Corvallis which suggested that...
Resource Type:: Honors College Thesis
Full Text:: 1 Screening for Viral Disease in the OSU Tomato Breeding

The biology and control of the insect vectors of potato viruses in Oregon

Creator:: Crumb, S. E. (Samuel Ebb)
Resource Type:: Dissertation
Full Text:: project. He has grown the tuber samples from insecticide plots and determined the amount of disease

ScholarsArchive@OSU

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

Understanding sporulation and dissemination of Podosphaera macularis, hop powdery mildew

Control of Black Vine Weevil in Hop

Powdery mildew (Podosphaera macularis Braun & Takamatsu) resistance in wild hop genetic resources

Hop Pest Management Program

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

Investigation of hop downy mildew through association mapping and observations of the oospore

Tactics for enhancing conservation biological control of twospotted spider mites, Tetranychus urticae Koch, in Pacific Northwest hop yards

Screening for Viral Disease in the OSU Tomato Breeding Program

The biology and control of the insect vectors of potato viruses in Oregon

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