Rootstock Effects on Deficit-Irrigated Winegrapes in a Dry Climate: Vigor, Yield Formation, and Fruit Ripening

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Figure 1
Growing degree day accumulation (base 10°C) in Prosser, WA, from 1 Apr to 31 Oct 2007 through 2009.
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Figure 2
Influence of growing season and scion cultivar on the volumetric soil water content in the top 90 cm (means ± se) of a deficit-irrigated rootstock trial block in Prosser, WA, in 2007 (n = 5), 2008 (n = 5), and 2009 (n = 10; BB: budbreak, B: bloom, V: veraison, H: harvest).

Table 1
Meteorological data from the Washington State University AgWeatherNet Roza weather station near Prosser, WA (<1 km east of vineyard site).
Table 2
Effect of scion cultivar on average midday stem water potential (Ψ_x) during fruit ripening of field-grown grapevines in the Yakima Valley, WA (all se ≤ 0.05 MPa).
Table 3
Effect of rootstock on measures of vine vigor and balance of three scion cultivars in the Yakima Valley, WA, over three years.
Table 4
Effect of rootstock on yield and its components of three scion cultivars in the Yakima Valley, WA, over three years.
Table 5
Inflorescence and flower size (estimated from dry weights of collected flower caps) and fruit set of three scion cultivars in the Yakima Valley, WA, over three years.
Table 6
Basic fruit composition at harvest of three scion cultivars in the Yakima Valley, WA, over three years.