. Diseases of flowers and other ornamentals. Flowers; Plant diseases. 36 California Agricultural Extension Service [Cir. H8 large, hoof-shaped conks or fruiting bodies attached to the trunk at branch stubs or knotholes; the upper surface is light brown, the lower yellowish green. These are very short-lived, being quickly destroyed by insects. Witches' Broom, Rust.—In the native incense cedar, numerous large and small witches' brooms or masses of short branches are caused by a. Fig. 11.—Sclerotial fungus that causes root rot of iris. fungus, Gymnosporangium libocedri. Another or alternate stage
. Diseases of flowers and other ornamentals. Flowers; Plant diseases. 36 California Agricultural Extension Service [Cir. H8 large, hoof-shaped conks or fruiting bodies attached to the trunk at branch stubs or knotholes; the upper surface is light brown, the lower yellowish green. These are very short-lived, being quickly destroyed by insects. Witches' Broom, Rust.—In the native incense cedar, numerous large and small witches' brooms or masses of short branches are caused by a. Fig. 11.—Sclerotial fungus that causes root rot of iris. fungus, Gymnosporangium libocedri. Another or alternate stage of the same fungus lives on trees of the apple and pear family and causes a rust of the leaves and fruit. The latter stage, in California, attacks native hosts like shad bush and has been observed on pear. IRIS Leaf Spot.—Small, translucent spots which gradually enlarge and be- come yellow, sometimes appear on the leaves, the center of the older spots being gray with a brown border. As a result of this, the leaves are killed. The cause is a fungus, Didymellina macrospora. If this disease is present, all the old, dead leaves should be cleaned up and burned before new growth starts in the 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
