FUNGI IMPERFECTI 



305 



XVI. BLIGHT OF GINSENG 1 



Alternaria Panax Whetzel 



Occurrence and symptoms. The so-called "blight" is the most 

 common and destructive disease of cultivated ginseng. It occurs 



I 



; 



I 



Fig. 138. Blight of Ginseng: Frequent Forms of the Disease 

 (Photograph by H. H. Whetzel) 



apparently throughout the eastern United States wherever ginseng 

 is grown, but has not been with certainty reported west of the 

 Mississippi. The disease is caused by Alternaria Panax Whetzel, 



1 This account of the blight of ginseng was kindly prepared by Professor H. 

 H. Whetzel, Cornell University. 



