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
This method of pruning differs materially from that this season adopted
by A. B. Butler. He leaves now only from five to eight spurs on the
vines, generally the lesser number. He maintains that his object is to
produce large and superior grapes, and not to have his vines overbear.
The outcome of such close pruning has not yet been demonstrated, but it
may be possible that this is the proper way. Mr. Butler has certainly
one point in his favor, and that is that it has not yet been
demonstrated that very close pruning causes the disease known as
black-knot, as quite frequently the unpruned vines show this disease
much more than those which are pruned close. Another point in favor of
this pruning is that it has been practiced in Malaga for years without
any ill effects. But, before such very close pruning can be generally
recommended, our experience in this direction should be more extensive,
and several years more will be necessary to come to any satisfactory
conclusion in this respect. We know, however, that too many (say from
twenty to twenty-five) spurs will exhaust the low-headed Muscatel vines,
and in order to bring such vines back to proper bearing it has been
found necessary to reduce the number of spurs at once to one-third and
then gradually increase their number as the vines grow stronger. Every
grower should study his own vines and adapt the number of spurs to the
quality of the crop. If the crop is inferior, reduce the number; if
again the crop is superior, we may try to gradually give a few more
spurs in order to reach the greatest yield of first-class grapes. In
pruning the spurs, the cut should be made a little above the eye or bud,
and not so close to it that it will be injured and dry out.
Suckers from the roots should be removed to a limited extent, that is,
now and then a sucker may be left in order to give material for forming
a new head, if this should be found necessary. But as a rule the many
suckers which rise from the roots should be removed in early spring with
a sharp-pointed stick, and even those which rise from below the regular
head should be broken off while young, or be pruned off in winter time.
Public-domain text, read in full here on John Shaqi.
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