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Filtering by: Subject Powdery mildew diseases Remove constraint Subject: Powdery mildew diseases

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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
Influence of atmospheric humidity on sporulation of Sphaerotheca pannosa (Wallr.) Lev. var. rosae Wor.

Creator:

Hural, Kirsten

Abstract:

The influence of atmospheric humidity on three aspects of sporulation of Sphaerotheca pannosa (Wallr.) Lev. var. rosae Wor., which causes rose powdery mildew, was studied on leaf disks of susceptible Rosa cultivar Samantha. To study conidiophore production, leaf disks were inoculated on the adaxial (upper) surface with conidia of S....

Resource Type:

Masters Thesis
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
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

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Academic Affiliation

Botany and Plant Pathology3
Horticulture1

Advisor

Coyier, Duane L.2
Hummer, Kim E.1
Mahaffee, Walter F.1

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1983 to 2008

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Committee Member

Bottomley, Peter1
Cameron, Ron1
Mundt, Christopher C.1
Pfender, William1
Stotz, Henrik1
more Committee Members »

Creator

Bender, Carol Lavane1
Hural, Kirsten1
Peetz, Amy B.1
Smith, Jodi M.1

Date

Date range begin – Date range end

Current results range from 1982 to 2007

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Decade

2000-20092
1980-19892

Degree Field

Botany and Plant Pathology3
Horticulture1

Degree Level

Master's4

Degree Name

Master of Science (M.S.)4

File Format

application/pdf1

Language

English [eng]4

License

All rights reserved1

Non-Academic Affiliation

Oregon State University. Graduate School4

Peer Reviewed

No3

Resource Type

Masters Thesis4

Rights Statement

Copyright Not Evaluated2
In Copyright2

Subject

Powdery mildew diseases[remove]4
Erysiphaceae1
Hops -- Disease and pest resistance1
Hops -- Diseases and pests1
Hops -- Genetics1
more Subjects »

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