70 DISEASES OF GINSENG. 



established. In some gardens naore or less isolated, the disease 

 has not yet appeared. In view of the strong probability that 

 spores of the fungus are frequently carried from diseased gardens 

 on the clothing of visitors, it is highly important that growers 

 having gardens which have never shown blight, should exercise 

 the greatest care in admitting persons to their enclosures. Neither 

 the owner, workmen, nor visitors should enter the garden in cloth- 

 ing (shoes included) which has recently been worn in gardens 

 affected with the disease- Since the spores of the parasite retain 

 vitality for a long period, thorough brushing, or even sterilization, 

 of the clothing after a visit to a disease-infested garden is impera- 

 tive. The introduction of the fungus into new plantings with seed 

 or roots is possible, but the evidence at hand indicates that this is 

 not frequent at least. Since the fungus is a natural enemy of the 

 wild ginseng plants, it may be easily introduced on diseased plants, 

 transplanted from the woods- From the nature of the parasite, it 

 seems very probable that the fungus, if introduced with seed or 

 roots, will be in bits of diseased stems or leaves, mixed with the 

 soil in which roots or seed are packed. Such soil should be so 

 disposed of as to prevent its introduction into the new gardens and 

 to guard against possible spores or bits of infested stems going 

 into the soil with seeds or roots. These may be dipped, before 

 planting, for ten or fifteen minutes into a formalin solution, two 

 parts in one hundred parts of water. It must not be expected, 

 however, that such measures will absolutely insure against the ap- 

 pearance of the disease in the garden. The present wide distribu- 

 tion of the fungus and the ease with which it is carried from gar- 

 den to garden, make certain its introduction, sooner or later, into 

 even the most carefully guarded plantings. Other measures, to be 

 described below, must be employed if losses from this pest are to 

 be avoided. 



