. Diseases of fruits and nuts. Fruit; Nuts. 26 California Agricultural Extension Service [Cir. 120 dark, moldy patches of the fungus Yenturia inaequalis appear on the young apples (fig. 10) and leaves. As the apples get older, if there is much scab fungus on them, they develop rough, corky, deformed spots which ruin their appearance and make them more likely to rot. Small scab spots sometimes develop on fruit which is full grown, even in storage (fig. 11). To prevent apple scab, spray the trees with liquid lime-sulfur 2-100 (p. 160) or wettable sulfur, 6 pounds to 100 gallons (p. 160), or both
. Diseases of fruits and nuts. Fruit; Nuts. 26 California Agricultural Extension Service [Cir. 120 dark, moldy patches of the fungus Yenturia inaequalis appear on the young apples (fig. 10) and leaves. As the apples get older, if there is much scab fungus on them, they develop rough, corky, deformed spots which ruin their appearance and make them more likely to rot. Small scab spots sometimes develop on fruit which is full grown, even in storage (fig. 11). To prevent apple scab, spray the trees with liquid lime-sulfur 2-100 (p. 160) or wettable sulfur, 6 pounds to 100 gallons (p. 160), or both mixed together, in the cluster-bud stage (just before the blossom buds. Fig. 11.—Late scab of apple on mature fruit. separate) and again after most of the petals have fallen (table 2). This will also control mildew and may be combined with lead arsenate for in- sects. To lessen the possibility of injury, the growers in certain districts use only 1 gallon of lime-sulfur or even % gallon to 100 gallons of water, adding 5 to 7 pounds of sulfur. Wettable sulfur alone without any lime- sulfur is still safer. Bordeaux mixture 3-3-50 (p. 156) is sometimes used but may russet the fruit (fig. 12). Scald.—This is a nonparasitic storage trouble in which the apples become soft and discolored, with no mold on the surface. Scald is pre- vented by good ventilation and air circulation in the storage room and wrapping the fruit in special oiled-paper wrappers that are made for this purpose. Sour Sap.—In certain seasons, many young trees, or some of their. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smith, Ralph E. (Ralph Eliot), 1874-1953. Berkeley, Calif. : The College of Agriculture, University of California
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