. Diseases of flowers and other ornamentals. Flowers; Plant diseases. Fig. 32.—Effect of mosaic disease on sweet-pea blossoms. flowers "break" or become mottled and bleached in color (fig. 31), and are thus rendered unfit for the cut-flower market. When grown for seed, the size of the pods is greatly reduced by this virus. Destroy affected plants and spray or dust to destroy aphids, especially in the seedbed. Verticillium Wilt, Verticilliosis.—In this disease, the leaves droop and the whole plant wilts, lingers a long time, then finally dies. The soil fungus which causes the disease,
. Diseases of flowers and other ornamentals. Flowers; Plant diseases. Fig. 32.—Effect of mosaic disease on sweet-pea blossoms. flowers "break" or become mottled and bleached in color (fig. 31), and are thus rendered unfit for the cut-flower market. When grown for seed, the size of the pods is greatly reduced by this virus. Destroy affected plants and spray or dust to destroy aphids, especially in the seedbed. Verticillium Wilt, Verticilliosis.—In this disease, the leaves droop and the whole plant wilts, lingers a long time, then finally dies. The soil fungus which causes the disease, Verticillium albo-atrum, brings about a rotting of the roots and lower stem of stocks and many other plants like snapdragon, crysanthemum, cotton, and tomato (see p. 92). Plants which show wilting should be pulled out and destroyed as soon as detected. SWEET PEA Bud Dropping.—In this disease, the flower buds drop before opening. It is favored by excessive watering and nitrogenous fertilizers, which should therefore be 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. : College of Agriculture, University of California
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Keywords: ., bo, bookcentury1900, booksubjectflowers, booksubjectplantdiseases
