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D.W. Lotter, J. Granett, and A.D. Omer

We thank Fetzer Vineyards (Ukiah, Calif.), Robert Mondavi Vineyards (Rutherford, Calif.), the Univ. of California Sustainable Agriculture Research and Education Program, the Organic Farming Research Foundation (Santa Cruz, Calif.) for their

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Joan R. Davenport, Robert G. Stevens, and Kelly M. Whitley

demonstrated to a depth of 120 cm ( Stevens and Harvey, 1996 ). These patterns of root distribution and soil moisture depletion have implications for vineyard management. Placement of soil moisture-monitoring devices (e.g., neutron probe access tubes

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Xiaomei Cheng and Kendra Baumgartner

1 To whom reprint request should be addressed; email kbaumgartner@ucdavis.edu . This research was supported by the USDA-ARS and the American Vineyard Foundation. We thank Jeremy Warren and Sharon Schnabel for

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Lloyd L. Nackley, Brent Warneke, Lauren Fessler, Jay W. Pscheidt, David Lockwood, Wesley C. Wright, Xiaocun Sun, and Amy Fulcher

frequent applications of pesticides due to intense pressure from pests and diseases and to meet the stringent aesthetic requirements for marketable fruits and vegetables. In apple ( Malus domestica ) orchard and grape ( Vitis vinifera ) vineyards, up to

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Adam D. Karl, Ian A. Merwin, Michael G. Brown, Rebecca A. Hervieux, and Justine E. Vanden Heuvel

regions like the Finger Lakes of New York where vineyards are predominantly located on slopes in close proximity to lakes, and pollution from runoff and leaching of nutrients and agrochemicals is of increased concern. Weed control in the under-vine row can

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Alison L. Reeve, Patricia A. Skinkis, Amanda J. Vance, Jungmin Lee, and Julie M. Tarara

‘Pinot noir’ is the most important grape cultivar produced in the state of Oregon based on production and value. Vineyards within Oregon’s Willamette Valley, contain 82% of the state’s ‘Pinot noir’ acreage ( SOURCE, 2015 ), are characterized by

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Larry J. Bettiga

During the mid to late 1980s in the Salinas Valley (Monterey County) of California, susceptible own-rooted vineyards infested with grape phylloxera ( Daktulosphaira vitifoliae ) were replanted to wine grape cultivars grafted on resistant rootstocks

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Joan R. Davenport, Robert G. Stevens, Kelly M. Whitley, and Tanya Winkler

Water movement in regulated deficit irrigated wine grape vineyards in the inland Pacific Northwest has been shown to be restricted to a fairly small zone and often soil moisture status is very low ( Davenport et al., 2008 ). Because plant nutrient

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R. Paul Schreiner, Patricia A. Skinkis, and Amy J. Dreves

., 2007 ). However, subsequent sampling in numerous vineyards where spring shoot stunting occurred (2005 to 2009) revealed the absence of grape rust mites or grape bud mites ( Colomerus vitis ) on young shoots (R.P. Schreiner and P.A. Skinkis, unpublished

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Lee Johnson and Thibaut Scholasch

Airborne multispectral image data were compared with intercepted photosynthetic photon flux (PPF) in commercial winegrape (Vitis vinifera) vineyards of Napa Valley, Calif. An empirically based calibration was applied to transform raw image pixel values to surface reflectance. Reflectance data from the red and near-infrared spectral regions were combined into a normalized difference vegetation index. Strong linear response was observed between the vegetation index and PPF interception ranging from 0.15 to 0.50. Study results suggest the possibility of using optical remote sensing to monitor and map vineyard shaded area, thus providing spatially explicit input to water budget models that invoke evapotranspiration crop coefficient based calculations.