. Diseases of economic plants . Plant diseases. DISEASES OF SPECIAL CROPS 89 Hypochnose' (Hy- pochnus ochroleuca, Noack). •— Hypoch- nose is principally a leaf affection causing blight and loss of the leaves, and thereby weakening the vital- ity of the tree. Superficially this disease resembles the blight, with which it might be confounded by the casual ob- server. It may be readily distinguished, however, by two char- acters: first, the manner in which the leaves droop and mat together, which is quite different from the habit of the blight, the leaves of which neither droop nor mat; second, b
. Diseases of economic plants . Plant diseases. DISEASES OF SPECIAL CROPS 89 Hypochnose' (Hy- pochnus ochroleuca, Noack). •— Hypoch- nose is principally a leaf affection causing blight and loss of the leaves, and thereby weakening the vital- ity of the tree. Superficially this disease resembles the blight, with which it might be confounded by the casual ob- server. It may be readily distinguished, however, by two char- acters: first, the manner in which the leaves droop and mat together, which is quite different from the habit of the blight, the leaves of which neither droop nor mat; second, by the presence of small scle- rotia, white when young, cinnamon-brown when mature, upon the twigs adjacent to the affected leaves. These sclerotia usually measure about 2-3 mm. in diameter. To- ' Stevens, F. L., and Hall, J. G., Ann. Mycol. VII, 49, Fig. 34. - -Hypochnose, showing matting of leaves. Original,. 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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