. Diseases of economic plants . Plant diseases. DISEASES OF SPECIAL CROPS 77 ing. One county alone is estimated to have suffered a loss of $950,000. Owing to its superficial similarity to the scab, it has perhaps been confounded with it in some instances. The first publica- tion concerning the disease appeared in 1902,' and the first detailed description in 1907.- Upon the fruit the blotches are from 5-10 mm. in diam- eter, dark in color, with an advancing margin of very peculiar, irregular, jagged, or fringed appearance. By co- alescence large spots may form, and owing to tension, cracks appe

- Image ID: RDEX78
. Diseases of economic plants . Plant diseases. DISEASES OF SPECIAL CROPS 77 ing. One county alone is estimated to have suffered a loss of $950,000. Owing to its superficial similarity to the scab, it has perhaps been confounded with it in some instances. The first publica- tion concerning the disease appeared in 1902,' and the first detailed description in 1907.- Upon the fruit the blotches are from 5-10 mm. in diam- eter, dark in color, with an advancing margin of very peculiar, irregular, jagged, or fringed appearance. By co- alescence large spots may form, and owing to tension, cracks appe
The Book Worm / Alamy Stock Photo
Image ID: RDEX78
. Diseases of economic plants . Plant diseases. DISEASES OF SPECIAL CROPS 77 ing. One county alone is estimated to have suffered a loss of $950,000. Owing to its superficial similarity to the scab, it has perhaps been confounded with it in some instances. The first publica- tion concerning the disease appeared in 1902,' and the first detailed description in 1907.- Upon the fruit the blotches are from 5-10 mm. in diam- eter, dark in color, with an advancing margin of very peculiar, irregular, jagged, or fringed appearance. By co- alescence large spots may form, and owing to tension, cracks appear, enlarging to a centimeter in length, or even girdling the fruit, and reach- ing to the core. In the older portions of the blotch, minute pycnidia develop. These blotches mar the appearance of the fruit and injure it as fiq. 27.—Apple blotch (phyiiostictose) , , , T . on twigs. Original. a salable product. Upon twigs, spurs, or shoots are produced cankers, > Clinton, G. P., III. Agr. Exp. Sta. Bui. .69, pp. 190-192. ' Scott, W. M., and Qualntance, A. L., U.S. Dept. Agr. Farmers' Bui. 283, pp. 14-18.. 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 work.. Stevens, Frank Lincoln, 1871-1934; Hall, John Galentine, 1870-. New York : Macmillan

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