Diseases of flowers and other Diseases of flowers and other ornamentals diseasesofflower118smit Year: 1940 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 fun
Diseases of flowers and other Diseases of flowers and other ornamentals diseasesofflower118smit Year: 1940 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 avoided.
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