. California plant diseases. Plant diseases. 1142 UNIVERSITY OF CALIFORNIA—EXPERIMENT STATION. a good soaking at long intervals rather than to keep sprinkling on a little water frequently. One should keep the surface as dry as possible and after the plants get well started determine the need of water by digging down into the soil beneath rather than wetting the bed as soon as the surface sand gets dry. Leaf Spot—Gum Spot. Figure G7. Dark colored, slightly raised spots or areas* appear on the back side of. Fig. 67.—Gumming of orange leaves. the leaf in places where it is turned up and exposed t
. California plant diseases. Plant diseases. 1142 UNIVERSITY OF CALIFORNIA—EXPERIMENT STATION. a good soaking at long intervals rather than to keep sprinkling on a little water frequently. One should keep the surface as dry as possible and after the plants get well started determine the need of water by digging down into the soil beneath rather than wetting the bed as soon as the surface sand gets dry. Leaf Spot—Gum Spot. Figure G7. Dark colored, slightly raised spots or areas* appear on the back side of. Fig. 67.—Gumming of orange leaves. the leaf in places where it is turned up and exposed to the sun. These spots are formed by the deposition of a gummy substance in the tissue. The trouble appears to be in a form of gumming resulting from sunburn on the under side of the leaf. Not serious. Blue Mold (Penicillium italicum and P. digitatum). Figure 54. The fruit shows a soft, moldy decay, the surface of the affected portion being covered with a dusty mass of spores, of a blue or green color, according as the first or second named fungus is present. The blue. 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; Smith, Elizabeth H. (Elizabeth Hight), 1877-1933. Berkeley, Cal. : Agricultural Experiment Station
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplantdi, bookyear1911
