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Diseases of Ginseng Caused by Sclerotinias. 



By Gko. a. Osner. 



The diseases of ginseng may be divided into two main classes ; first, 

 tliose whicti attaclv primarily only the part above ground, and second, 

 those which directly affect the root of the plant. Of the former class, 

 the two most destructive diseases are the Alternaria Blight and Phytoph- 

 thora Mildew. Of the latter class, four or five of the most important 

 ones may be mentioned, among which are: Wilt, End or Fiber Rot, Soft 

 liot, and those diseases caused by Sclerotinias — the Black and Crown 

 IiOts. It is with the two last named diseases that this paper deals. 





Fig. 1. Photograph of a portion of a ginseng garden, showing a spot in one of the beds killed 

 by Black Rot fungus. 



