Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . econdspraying, which, by the way, should be at the sametime as that mentioned for the flowers of sulphur, inorder to protect the blossoms from the fungus. Literature.—An excellent account of this fungus,from the pen of Professor Scribner, may be found in theReport of the United States Department of Agriculturefor 1886 (pp. 105-109). There are many shorter arti-cles concerning it scattered through our horticulturalliterature. The Grape Anthracnose Sphaceloma
Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . econdspraying, which, by the way, should be at the sametime as that mentioned for the flowers of sulphur, inorder to protect the blossoms from the fungus. Literature.—An excellent account of this fungus,from the pen of Professor Scribner, may be found in theReport of the United States Department of Agriculturefor 1886 (pp. 105-109). There are many shorter arti-cles concerning it scattered through our horticulturalliterature. The Grape Anthracnose Sphaceloma ampelinum The peculiar and characteristic injury producedby the fungus of anthracnose easily distinguishes itfrom the other diseases of the vine. It attacks all the 88 FUIfGI AXD FUNGICIDES green parts of the plant, nsnally doing most damage tothe young shoots and the fruit. On the former it ap-pears at first in the shape ofsmall round brown spots,depressed in the center, andhaving a slightly elevateddark colored border. As theshoots grow the spots grad-ually elono-ate, and theirmiddle portions becomemore distinctly depressed be-. cause of the killing of the tissue. The effect upon thefruit is w^ell illustrated inFig. 43 ; there first appearsa small grayish spot, havingits margins dark spot gradually enlarges,and there is frequently de-Telojoed just inside the darkbrown margin a bright ver-milion ring. On account ofthis, the disease is oftencalled the Birds-eye the fungus progresses thegrowth of the berry ischecked, and it finallv be-comes a dry, withered massof skin, surrounding the par-tially developed seeds. Themanner of development uponthe leaves is similar to that FIG. 43. ELVIRA GRAPE AFFECTED UpOU thC grCCU shoOtS. LlkC BY AXTHRAcxosE. ^^j^g^, fungi, thc authrac- nose fungus reproduces by means of minute spores, someof which are represented, highly magnified, at Fig. 44 c. THE GEAPE ANTHRACKOSE 89 When one of these spores falls upon a green leaf, stem
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpathoge, bookyear1896
