. Diseases of economic plants. Plant diseases. SMALL FRUITS 181 STRAWBERRY Leaf spot (Sphcerella fragarice (Tul.) Sacc). — The most conspicuous disease of the strawberry, one nearly al- ways present to some extent on both wild and culti-. Fig. 78. — Strawberry leaf spot. After Freeman. vated varieties, is known by the presence of small 4-6 mm. purple or red bordered spots upon the leaves, the older spots bearing white or ashen centers. Late in the development of the spots the hyphse of the causal fungus are barely visible in these centers with a good hand lens. The spots, when dimerous, may co
. Diseases of economic plants. Plant diseases. SMALL FRUITS 181 STRAWBERRY Leaf spot (Sphcerella fragarice (Tul.) Sacc). — The most conspicuous disease of the strawberry, one nearly al- ways present to some extent on both wild and culti-. Fig. 78. — Strawberry leaf spot. After Freeman. vated varieties, is known by the presence of small 4-6 mm. purple or red bordered spots upon the leaves, the older spots bearing white or ashen centers. Late in the development of the spots the hyphse of the causal fungus are barely visible in these centers with a good hand lens. The spots, when dimerous, may coalesce, forming. 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 Stevens, Frank Lincoln, 1871-1934; Hall, John Galentine, 1870- joint author. New York, The Macmillan Company
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Keywords: ., bookauthorstevensf, bookcentury1900, bookdecade1910, bookyear1910
