[Separation and identification of pathogens of Panax quinquefolium].
D000528:Alternaria / Q000302:isolation & purification; D005670:Fusarium / Q000302:isolation & purification; D005894:Panax / Q000382:microbiology*; D010946:Plants, Medicinal; D011775:Pythium / Q000302:isolation & purification; D012232:Rhizoctonia / Q000302:isolation & purification