. Diseases of flowers and other ornamentals. Flowers; Plant diseases. Diseases of Flowers and Other Ornamentals 53 Leaf Spot.—The foliage of photinia, or Christmas berry, is often dis- figured and shabby-looking on account of dead spots on the leaves (fig. 20). Fabraea maculata and several other less common species of fungi, and various insects contribute to this effect. F. maculata is the cause of a common leaf and fruit spot of the pear in the eastern parts of the country but is not known on this host in California. The fungus may not. Fig. 20.—Leaf spot on photinia. be identical in the two
. Diseases of flowers and other ornamentals. Flowers; Plant diseases. Diseases of Flowers and Other Ornamentals 53 Leaf Spot.—The foliage of photinia, or Christmas berry, is often dis- figured and shabby-looking on account of dead spots on the leaves (fig. 20). Fabraea maculata and several other less common species of fungi, and various insects contribute to this effect. F. maculata is the cause of a common leaf and fruit spot of the pear in the eastern parts of the country but is not known on this host in California. The fungus may not. Fig. 20.—Leaf spot on photinia. be identical in the two hosts. For control see the last section under this plant. Scab.—Small spots of brown, velvety, fungus growth appear on the leaves (fig. 21), flower stalks, and green berries, and disfigure the latter when mature. This fungus, Fusicladium photinicola, is very similar to those causing scab on apple, pear, loquat, and other pomaceous hosts, but the ones on different hosts appear to be of different species, so that cross-infection does not occur. For control see the last section under this plant. Thrips Effect.—A bad stunting, curling, and deformity of the leaves toward the ends of the shoots is caused by minute insects, Tiothrips ilex, feeding in the terminal growth. For control see the last section under this 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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