DISEASES OF GINSENG. 99 



almost completely with this disease, while four other adjoining 

 beds, set out at the same time, with the same kind of roots and 

 undei- the same conditions, but treated with the acid phosphate 

 were but very little affected with fiber rot and had larger and 

 cleaner roots. 



Garden No. 5. - These beds were treated with acid phos- 

 phate last fall at the rate of 1,000 pounds per acre. Last year 

 this garden suffered severely from fiber rot, while this year the 

 loss was much less. The plants still infected this year are old 

 roots that had probably been infected so badly last year that the 

 fungus was able to maintain itself this summer in spite of the acid 

 phosphate used. 



Garden No- 6. —The owner had used -500 pounds acid phos- 

 phate per acre on part of his garden, but both the treated and 

 untreated beds were considerably affected with the fiber rot, there 

 being but little difference between the two- However, this garden 

 had formerly been a tobacco field and as it is in such places that 

 this fungus is found most abundant, this probably accounts for 

 the fiber rot. Tiie use of a larger amount of acid phosphate would 

 probably have given more benificial results. 



Garden No- 7 - The owner had treated the larger part of 

 one garden last fdll with 500 pounds acid phosphate per acre, 

 raked into the mulch- These beds, which had very little fiber 

 rot, showed a decided improvement over last year. One small 

 bed, 6x8 feet, treated with 1,000 pounds acid phosphate, had more 

 fiber rot than the beds treated with 500 pounds, but this was on 

 too small a scale to be conclusive. 



Several otlier gardens were visited which had been treated 

 with acid phosphate, in all of which it showed more or less benifi- 

 cial results. However, the results given above show a very fair 



