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
_Climate._--The nearness to the ocean modifies the climate much. The
temperature is more even all the year round than anywhere else on the
coast where raisins are grown. The extreme of heat is 105 degrees; in
fact, July 27, 1889, it was 104 degrees Fahrenheit in the shade, while
in the winter it seldom goes lower than 28 degrees Fahrenheit, and
indeed very, very rarely as low as that. In many places there is no
frost at all, except, perhaps, one in April, which, of course, cannot
but prove damaging to the vines. This absence of heavy frost, which is
beneficial to every other semi-tropical product, is not favorable to the
vine. The grape requires heavy frost to become dormant. The farther
south we go the less frost and the less grapes, at least of the Asiatic
kind. There are, as we know, native grapes even in tropical countries,
but they are adapted to their surroundings and cannot be considered
here. The proximity to the coast modifies the air considerably. With 100
degrees Fahrenheit in the shade, which is an exception here, I felt as
warm as I do in the San Joaquin valley with the mercury at 114;--the two
extremes in both places affect us just the same. The air here is
certainly much more moist, which again must have a marked effect upon
the vine, and in no small degree promote fungoid growths, or parasites
generally. In this respect, then, the coast vineyard must certainly be
at a disadvantage. The fog is not an unusual visitor in the district
between the coast and the foothills, which, in fact, covers the whole
area ever planted in raisin grapes. For days in succession every morning
is foggy, and the fog condenses on the leaves of the trees and falls
under them in real showers, making the adjoining and underlying road
wet. For a few days again the sun will rise bright, again to be followed
by foggy mornings. By from nine to eleven o’clock the fog is again gone
and the sun shines brightly. Every evening and morning there is a heavy
dew, and every branch, leaf or grass is then dripping wet. Several
mornings when the fog was in I found the thermometer at 62 degrees
Fahrenheit, while at noon it rose to over 100.
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