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66. Shear, C. L. Endothia radicalis (Schw.). Phytop. 3:61. F. 1913. 
67. Smith, J. R. The chestnut blight and constructive conservation. 
Penn. Chest. Blight Confer.: 144-9. 1912. 
68. Smith, J. R. The menace of the chestnut blight. Outing 1912: 76-83. 
O. 1912. [Illust.] 
69. Spaulding, P. Notes upon tree diseases in the eastern states. Mycol. 
4:148-9. My. 1912. 
70. Stewart, F.C. Can the chestnut bark disease be controlled? Penn. 
Chest. Blight Confer.: 40-5. 1912. 
71. Stoddard, E. M. The chestnut tree blight. Conn. Farm. 41” : 1-2, 
24 Je. 1911. 
72. Wells, H. E. A report on scout work on the north bench of Bald 
Eagle mountain, Pa. Penn. Chest. Blight Confer. : 235-41. 1912. 
73. ‘Williams, I. C. The new chestnut bark disease. Science 34: 397-400. 
29 S. IQII. 
74. Williams, I. C. Additional facts about the chestnut blight. Science 
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GENERAL SUMMARY. 
(1) Chestnut blight was first noticed in this country by 
Merkel, of the New York Zoological Park in 1904, and in 
1906 was attributed by Murrill, of the New York Botanical 
Garden, to a fungus which he described as new to science, and 
called Diaporthe parasitica. 
(2) The chestnut blight fungus has now been found in 
twelve states, from New Hampshire and Vermont on the 
north to Virginia and West Virginia on the south, and the 
damage that it has caused has been variously estimated from 
twenty-five to one hundred million dollars. 
(3) The fungus consists of a conidial, or Cytospora stage, 
and a mature, or asco-stage, produced one after the other in 
the orange- to chestnut-colored fruiting bodies, which break 
out of the bark as small, more or less clustered pustules. The 
fungus has also rarely been found on oaks, where as yet it 
causes no particular damage. In artificial cultures only the 
conidial stage occurs, whose spores exude in viscid drops, or 
rarely in tendrils as in nature. Artificial inoculation of chest- 
nut sprouts or seedlings produces the characteristic cankers 
in the bark, and these can be produced somewhat in oak 
sprouts. 
(4) This fungus has been found by Farlow, the writer, and 
others, to come more properly under the genus Endothia 
