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Filtering by: Creator Hagen, C. A. Remove constraint Creator: Hagen, C. A. Academic Affiliation Botany and Plant Pathology Remove constraint Academic Affiliation: Botany and Plant Pathology Non-Academic Affiliation Oregon Wine Research Institute Remove constraint Non-Academic Affiliation: Oregon Wine Research Institute

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Biology and Demographics of Phylloxera in Western Oregon

Creator:

Strik, Bernadine C., Connelly, Anne, Fisher, Glenn, and Granett, Jeffrey

Abstract:

Since phylloxera's discovery in a commercial vineyard in August of 1990, nine infestations have been verified in Oregon. With over 95% of Oregon's vineyards planted with ownrooted, Vitis vinifera, non-resistant vines, understanding the insect's biology under our conditions has become important for determining management strategies that minimize rate of spread....

Resource Type:

Technical Report

Full Text:

Wine Advisory Board Research Progress Report 1993 - 1994 Grape Phylloxera Program Bernadine C
Distribution and Population Dynamics of Plant-Parasitic Nematodes in Oregon Vineyards, and Their Effects on Vine Growth [1994-1995]

Creator:

Ingham, Russell E., Forge, Thomas, Strik, Bernadine C., and Pinkerton, J. N.

Abstract:

Objectives 1. Survey Oregon vineyards for the presence, identity and abundance of plant-parasitic nematodes. 2. Relate the distribution and abundance of potentially pathogenic species to viticultural practices and site characteristics. 3. Evaluate the efficacy of Nemacur for reducing populations of plant-parasitic nematodes. 4. Document seasonal changes in the abundance of...

Resource Type:

Technical Report

Full Text:

Thomas A. Forge Department of Botany and Plant Pathology Bernadine Strik, Department of Horticulture
Distribution and Population Dynamics of Plant-Parasitic Nematodes in Oregon Vineyards, and Their Effects on Vine Growth [1993-1994]

Creator:

Ingham, Russell E., Strik, Bernadine C., Forge, Thomas, and Connelly, Ann

Abstract:

Objectives: 1. Survey Oregon vineyards for the presence, identity and abundance of plant parasitic nematodes. 2. Document seasonal changes in abundance of species of important plant parasites in order to identify optimum times for sampling. 3. Evaluate the efficacy of Nemacur for reducing populations of plant parasitic nematodes.

Resource Type:

Technical Report

Full Text:

OSU Plant Disease Clinic from some Oregon vineyards over the last three years. As part of a survey
Evaluation of Grape Rootstocks for Resistance to Crown Gall and Nematodes [1996-1997]

Creator:

Pinkerton, Jack and Miller, Marilyn

Abstract:

The nng nematode, Cnconenwlla xenoplax, has been reported to depress the vigor and yields of grapevines in Europe, California, Washington, and Michigan. Population densities of 500 C. xenoplax per kg of soil have reported to reduce vine yield 10-25% in California. A survey of Oregon vineyards found C. xenoplax in...

Resource Type:

Technical Report

Full Text:

vine yield 10-25% in California. A survey of Oregon vineyards found C. xenoplax in 85% of the vineyard
Development and Testing of Bacteria Free Grapevines for Prevention of Crown Gall in Oregon Nurseries and Vineyards

Creator:

Miller, Marilyn L., Moore, Larry W., Mentzer, Jessica, Dierenfield, Lora, Ferguson, Kathleen, Candolfi-Vasconcelos, M. Carmo, and Castagnoli, Steve

Abstract:

Agrobacterium vitis is a bacterium that causes crown gall in grapevines. Plant injury from freezing temperatures or mechanical damage during cultivation often provide wounds required for infection to occur. Crown gall may kill grapevines and a new shoot is often brought up from the root to replace dead vines. Discovery...

Resource Type:

Technical Report

Full Text:

temperatures 50°C for 30 minutes have been reported to reduce disease incidence without impairing a graft (1
Pathogenicity and Management of Plant-Parasitic Nematodes on Vitis vinifera in Oregon Vineyards : 1996-1997

Creator:

Pinkerton, Jack, Candolfi-Vasconcelos, M. Carmo, and Ingham, Russell

Abstract:

Survey data compiled in 1995 showed that plant-pathogenic nematodes that cause yield loss in California and European vineyards are found in over 85% of Oregon vineyards. In over 37% of the samples collected, population densities of Xiphinema wnericanwn (dagger nematode) and Criconenw1la xenoplax (ring nematode) were greater than levels known...

Resource Type:

Technical Report

Full Text:

becon-c evident only after a nurnber of years of parasitism, the potential losses from nematodes are
Crown Gall of Grape Rootstocks

Creator:

Miller, Marilyn L., Tooley, Katie, Ferguson, Kathleen, Toma, Kyle, Mentzer, Jessica, and Moore, Larry W.

Abstract:

Crown gall can develop on grapevines wounded by freezing temperatures, mechanical damage or grafting. Pathogenic agrobacteria residing within the vascular system are able to initiate tumor growth in damaged plant cells. Sampling from 21 sites in Oregon vineyards and nurseries yielded diverse populations of pathogenic agrobacteria. Most of the pathogenic...

Resource Type:

Technical Report

Full Text:

in water at concentrations of 108 - 109 cfu ml-1, then samples placed in a water bath at 50°C for 30
Evaluation of Grape Powdery Mildew Forecasting Programs

Creator:

Pscheidt, Jay W., Wittig, H. P. P., and Candolfi-Vasconcelos, M. Carmo

Abstract:

Three forecasting programs for scheduling fungicide applications were selected for comparison with the standard Oregon phenology based program. The UCDavis (California) program used leaf wetness and temperature early in the year and only temperature during the summer. The New York program was based on rainfall and temperature. The German Oi...

Resource Type:

Technical Report

Full Text:

Forecasting Programs J. W. Pscheidt, H. P. P. Wittig and M. C. Candolfi-Vasconcelos Department of Botany
Resistance of Grape Rootstocks to Crown Gall

Creator:

Miller, Marilyn L., Tooley, Katie, Ferguson, Kathleen, Schindler, Clara, and Moore, Larry W.

Abstract:

Crown gall can develop on grapevines wounded by freezing temperatures, mechanical damage or grafting. Increased demand for grape varieties grafted to phylloxera resistant rootstocks has led to increased incidence of crown gall at graft unions. Therefore a search for plant material that is resistant to crown gall has been undertaken....

Resource Type:

Technical Report

Full Text:

. M. Blanchard and C. Bazzi. 1988. A root-specific decay of grapevine caused by Agrobacterjum
Pathogenicity and Management of Plant-Parasitic Nematodes on Vitis vinifera in Oregon Vineyards

Creator:

Pinkerton, Jack, Candolfi-Vasconcelos, M. Carmo, and Ingham, Russell E.

Abstract:

Plant-pathogenic nematodes that cause yield loss in California and European vineyards are found in over 85 % of Oregon vineyards. Population densities of Xiphinema americanun (dagger nematode) and Criconemella xenoplax (ring nematode) were found in 37% of vineyards at levels reported to cause > 10-25% loss in California vineyards. However,...

Resource Type:

Technical Report

Full Text:

p ulation densities of C. xenoplax and X. americanun, respectively, and a history of poor vine

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Academic Affiliation

Botany and Plant Pathology[remove]12
Horticulture8

Creator

Candolfi Vasconcelos, M. Carmo5
Miller, Marilyn L.4
Moore, Larry W.4
Pinkerton, Jack4
Ferguson, Kathleen3
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Current results range from 1994 to 1999

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1990-199912

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English [eng]12

Non-Academic Affiliation

Oregon Wine Research Institute[remove]12

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No12

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Technical Report12

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In Copyright12

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