Page 48 - Grapevine May-June 2019
P. 48
Around The Vineyard
positioning. The benefits are however substantial, Most experience around the world is with vinifera
with yield increase to 30% or more, no change in grapes; in fact Oyster Bay wines of New Zealand
other costs (apart from harvest), and typically less has 5,240 acres of Scott Henry planted in both NZ
disease. It is well known that powdery mildew and and Australia, no doubt the largest in the world.
Botrytis are higher in shaded canopies, and less for Results from their vineyards reinforce the message
Scott Henry than VSP. Because of improved bunch above, and on a grand scale!.
exposure, there is better color, flavour and pheno-
lics in vines trained to Scott Henry. Responses to Scott Henry Training
With Hybrid Grapes in Wisconsin
Cold climate hybrid grapes cultivars have pro-
pelled the expansion of the grape and wine indus-
tries in the Northeast and upper Midwest of the
United States, mostly due to their superior midwin-
ter hardiness compared to vinifera and other hybrid
cultivars. However, cold climate hybrids possess
high vegetative vigor which can be intensified when
vines are grown in very fertile soils, and summer
rainfall such as in the Midwest. The high vegetative
vigor of these hybrids can be challenging for grow-
ers to manage, and often results in dense canopies
with shaded fruit that is high in acidity and has
Dr. Richard Smart (left) and Rob Martyn of Oyster poor color development, as well as an overall delay
Bay in Scott Henry trained Shiraz vineyard,
Barossa Valley, South Australia in ripening. To control vigor, growers will usually
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