The Raisin Industry: A practical treatise on the raisin grapes, their history, culture and curingEisen, Gustavus A.
History
The Raisin Industry: A practical treatise on the raisin grapes, their history, culture and curing
Eisen, Gustavus A.
Raisins; Viticulture -- California
_The Vineyard._--In planting, cuttings are used principally, but rooted
vines are preferred by some. The distances most common are ten by ten
feet each way, one vineyard being set ten feet by sixteen feet. The
vines bear the third year. The ground is plowed and cross-plowed, the
first plowing being from the vines, and the second to the vines.
Harrowing and cultivating both ways are secondary operations, continued
to the middle of May, but seldom later. Hoeing the vines finishes the
work of the soil in the middle or end of May.
In pruning, the crowns are never raised over six inches above the
ground, from seven to eight spurs are left on large vines, and each spur
is pruned to two or three eyes each. Formerly more eyes, say from four
to five, were left on each cane, but it was found that this was too
many, hence the change to two or three eyes. Summer pruning is practiced
by some, but not by all; there is yet a controversy in regard to its
usefulness. When practiced, the vines are cut six or eight inches from
the tops, and this is done not later than June. Sulphuring is in use
everywhere; the vines are sulphured two times, once before and once
after the bloom. Sulphured vines do not suffer from mildew. Colure, or
the dropping of the young berries, is not common, the Muscat of
Alexandria even setting well. The leaf-hopper (_Erythroneura comes_) is
more common in some years than in others. They eat the leaves and cause
the grapes to sunburn. Grasshoppers have never caused any damage. Grape
moths are more or less common, but never troublesome. Black-knot is
often seen on neglected vines, but is rare in old vineyards well cared
for.
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