. California plant diseases. Plant diseases. 1112 UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. Root Knot (Nematode). Figure 41. Causes swellings all over the main and smaller roots. Found only in greenhouses. See page 1076. Control as in Stem Rot. Leaf Spot (Altcrnaria hrassicw, var. nigresccns). This fungus has been known to do considerable damage in a few cases, causing large dead spots, later covered with the black fruiting fungus. Not important as yet. Can be controlled with Bordeaux mixture. CURRANT. Mildew (Sphaerothcca mors-uvw). A white, powdery mildew on the leaves and fruit. Dust wit
. California plant diseases. Plant diseases. 1112 UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. Root Knot (Nematode). Figure 41. Causes swellings all over the main and smaller roots. Found only in greenhouses. See page 1076. Control as in Stem Rot. Leaf Spot (Altcrnaria hrassicw, var. nigresccns). This fungus has been known to do considerable damage in a few cases, causing large dead spots, later covered with the black fruiting fungus. Not important as yet. Can be controlled with Bordeaux mixture. CURRANT. Mildew (Sphaerothcca mors-uvw). A white, powdery mildew on the leaves and fruit. Dust with dry sulphur while the leaves are wet with dew, if treatment seems necessary. DAHLIA. Mildew. A white, powdery mildew on the leaves. Not serious. Treatment as for currant mildew. DEWBERRY. See Fig. 42.—Fruit rot of egg plant (Botrytis vulgaris). EGG PLANT. Rot (Botrytis). Figure 42. A moldy decay of the fruit. The fungus mentioned has a grey, dusty appearance. Not 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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