Objectives:
To evaluate the impact of the ring nematode, Mesocriconema xenoplax on the physiology and productivity of phylloxera-resistant grape rootstocks as a basis for recommending rootstocks in the Pacific Northwest. Specific objectives for 2006:
Spring: Inoculate soil with AMF and M. xenoplax. Plant vines.
Growing season: Monitor plant growth, gas...
Objectives of Proposed Research:
The goals of this project for the next few years are: 1) to develop optimal tissue nutrient levels for N, P, and K in winegrapes that are based on physiological performance and fruit quality, 2) to identify the best tissue (leaf vs. petiole) and time of...
Objectives:
I. To evaluate the effects of five cover crop mixes on grapevine: a) water stress b) nutrient status c) fruit production and quality d) shoot growth e) mycorrhizal colonization.
II. To evaluate cover crop mixes for their: a) establishment rate b) biomass production c) nutrient content.
The spatial and temporal development of grapevine root systems and associated mycorrhizal fungi was studied over the 1999 &2000 growing seasons in a 20-year-old block of Pinot noir vines at Woodhall Research Vineyard. We determined the root length density of woody roots and fine roots deemed to be physiologically active...
Objectives of Research :
1) Construct a whole-vine dry matter and mineral allocation budget for mature grapevines grown in Jory (basaltic parent material) soil.
2) Determine the associated seasonal dynamics of plant-available soil minerals.
3) Model the timing of uptake and allocation of mineral nutrients in different vine tissues.
Objectives of Research:
1) Construct a whole-vine dry matter and mineral allocation budget for mature grapevines grown in Jory (basaltic parent material) soil.
2) Determine the associated seasonal dynamics of plant-available soil minerals.
3) Model the timing of uptake and allocation of mineral nutrients in different vine tissues.
Competition between ‘Pinot noir’ grapevines and alleyway cover crops
was evaluated in two commercial vineyards in western Oregon. Seven
cover crop treatments including a clean-cultivated control were applied
in the fall of 2003 and their impact on vines was monitored in 2004
and 2005. Competition with grapevines was assessed by...
One of the most commonly encountered plant-parasitic nematodes in eastern Washington Vitis vinifera vineyards is Meloidogyne hapla; however, limited research exists on the impact of this nematode on V. vinifera. The objectives of this research were to determine the impact of M. hapla on Chardonnay and Cabernet Sauvignon vine establishment...
The most commonly encountered plant-parasitic nematodes in eastern Washington Vitis vinifera vineyards are Meloidogyne hapla, Mesocriconema xenoplax, Pratylenchus spp., Xiphinema americanum, and Paratylenchus sp.; however, little is known about their distribution in the soil profile. The vertical and horizontal spatial distribution of plant-parasitic nematodes was determined in two Washington V....
The grape rust mite [Calepitrimerus vitis (Acari: Eriophyidae)] is an important pest of grapevines (Vitis sp.) in grape-growing regions around the world. A rapid method for extracting eriophyoid mites was adapted from earlier studies to provide integrated pest management (IPM) consultants and commercial growers with a practical, efficient, and reliable...