. 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 1902,1 and the first detailed description in 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 appea
. 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 1902,1 and the first detailed description in 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 fig. 27.—Apple blotch (phyiiostictose) a salable product. ontwigs- 0riginal- Upon twigs, spurs, or shoots are produced cankers, 1 Clinton, G. P., 111. Agr. Exp. Sta. Bui. 69, pp. 190-192. 2 Scott, W. M., and Quaintance, A. L., Dept. Agr. Farmers' Bui. 283, pp. Ii»il|^. 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
Size: 1016px × 2459px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorstevensf, bookcentury1900, bookdecade1910, bookyear1910
