3 6 V I N E YA R D & W I N E RY M A N A G E M E N T
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M a r - A p r 2 016
w w w. v w m m e d i a . c o m
SPECIALIZED SYSTEMS
Since most vineyards in Napa
are farmed for quality rather than
production, and most soils aren't
that deep and vigorous there,
McMullen sees limited applications
of a horizontally divided canopy.
There are a few Geneva Double
Curtain (GDC)-inspired systems in
Napa, where the vine trunks are
trained high and there are quadri-
lateral cordons on two horizontally
placed fruiting wires, with shoots
trained downward or in a sprawl,
which were planted in the 1980s.
However, most of the horizontally
divided canopies in Napa are trel-
lised on a Lyre-type system. The
Lyre trellis system, which is similar
to GDC but with canes trained up in
two horizontally divided VSP cano-
pies, requires a lot of infrastructure
but offers better exposure to air-
flow and sun than does GDC, there-
by reducing disease pressure and
improving ripening and uniformity.
However, as with single-canopy
VSP, sunburn and variability in ripen-
ing from one side of the canopy to
the other can still be a major issue.
McMullen has seen the Lyre
work well for sites with deeper
A&J Vineyard Supply
707-963-5354
www.aj-vineyardsupply.com
AgFast Corporation
909-464-1373
www.agfast.com
Central Valley Builders Supply
707-261-7900
www.central-valley.com
Finger Lakes Trellis Supply
315-904-4007
www.fingerlakestrellissupply.com
Gripple
630-406-0600
www.gripple.com
Jim's Supply Company
800-423-8016
www.jimssupply.com
OESCO, Inc.
800-634-5557
www.oescoinc.com
Orchard Valley Supply Inc.
888-755-0098
www.orchardvalleysupply.com
PA Trellising Systems
www.patrellising.com
Spec Trellising
800-237-4594
www.spectrellising.com
Vineyard Industry Products
800-544-2210
www.vinbiz.com
Wilson Orchard
and Vineyard Supply
509-453-9983
www.wilsonirr.com
TRELLISING EQUIPMENT SUPPLIERS
SOIL & CELLAR
REMI COHEN
