. Diseases of economic plants. Plant diseases. DISEASES OF SPECIAL CROPS apple losses and has been noted in several states, notably Missouri, Nebraska, West Virginia, and North Carolina, in abundance enough to call for printed mention. Brown rot produces complete decay of the affected apples, which turn brown, become soft and wrinkled, and soon show pustules of bushy mycelium breaking through rifts and fissures in the skin over the diseased tissue. The diseased fruits may mummify upon the tree or more fre- quently fall to the ground and there shrivel to dry, hard, wrinkled masses, in which the
. Diseases of economic plants. Plant diseases. DISEASES OF SPECIAL CROPS apple losses and has been noted in several states, notably Missouri, Nebraska, West Virginia, and North Carolina, in abundance enough to call for printed mention. Brown rot produces complete decay of the affected apples, which turn brown, become soft and wrinkled, and soon show pustules of bushy mycelium breaking through rifts and fissures in the skin over the diseased tissue. The diseased fruits may mummify upon the tree or more fre- quently fall to the ground and there shrivel to dry, hard, wrinkled masses, in which the rot fungus winters. Powdery mildew, Sphaerothecose (Podosphoera leucotri- c/ia (;E.)Salm.). — The general ap- pearance of this mildew is much like that described for the grape ; that is, the surfaces of the leaves are more or less covered with a white or grayish fungous growth, in the later stages of which are found numerous very small black fruiting bodies approximately mm. in diameter. This fungus, while of comparatively little significance to old apple trees, causes much injury to nursery stock, often be- coming so serious as to prevent successful budding. Mil- dew has been reported as serious in California and other western states, — in Kentucky, Iowa, Washington, and. Fig. 37. — Brown rot (sclerotiniose) produced by inoculation. Note the fungus forms the letters A. M. C. 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-. New York, Macmillan
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Keywords: ., bookauthorstevensf, bookcentury1900, bookdecade1910, bookyear1910
