Ginseng diseases and their control
1916
Whetzel, Herbert Hice
"The average yield of ginseng per acre in the United States is not more than one-sixth to one-third of what might reasonably be expected, the shortage being caused almost entirely by the numerous diseases which attack the crop. The time of appearance and the severity of these diseases in any given locality depend on climate, soil, and cultural relations, but so far as observed by the writers, they are not confined to any particular region. Generally speaking, the same diseases are found in all ginseng-growing sections, from New York to the Pacific. The purpose of this bulletin is to bring to the attention of ginseng growers the most recent information regarding the symptoms, cause and control of the various diseases attacking the ginseng plant."--Introduction (p.1-2).
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