Diseases of flowers and other Diseases of flowers and other ornamentals diseasesofflower118smit Year: 1940 Diseases of Flowers and Other Ornamentals 37 Mosaic.—The foliage of iris affected by mosaic is streaked with light, yellowish-green areas and the plants somewhat stunted. This disease, which is more severe on the bulbous than on the rhizome type of iris, is caused by a virus. Affected plants should be destroyed if the disease is serious. Plants showing mosaic symptoms should not be used for propa- gation. Root Rot, Crown Rot.—Crowns and leaf bases of the plants may be rotted by a white
Diseases of flowers and other Diseases of flowers and other ornamentals diseasesofflower118smit Year: 1940 Diseases of Flowers and Other Ornamentals 37 Mosaic.—The foliage of iris affected by mosaic is streaked with light, yellowish-green areas and the plants somewhat stunted. This disease, which is more severe on the bulbous than on the rhizome type of iris, is caused by a virus. Affected plants should be destroyed if the disease is serious. Plants showing mosaic symptoms should not be used for propa- gation. Root Rot, Crown Rot.—Crowns and leaf bases of the plants may be rotted by a white mold fungus, Sclerotium Rolfsii or 8. delphinii, which ▼ 1
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