Apr. 15, 1914 
Pycnospores of Chestnut-Blight Fungus 
71 
Table II .—Longevity tests of pycnospores in soil stored in culture room in IQI3. 
Series E. 
[Rainfall: Date, April 27 and 28; amount, 2.43 inches. Date of collection of soil samples, April 28. Source 
of soil samples: No. 13. Base of sprout bearing pycnospore trap No. I. No. 14. Base of tree bearing 
pycnospore trap No. III.] 
Date of test. 
Number of 
days of dry¬ 
ing. 
j Number of viable spores per 
gram of soil. 
Soil sample 
No. 13. 
Soil sample 
No. 14. 
Apr. 29. 
0 
1, 209, 500 
2 , 948, OOO 
May 8. 
9 
282, OOO 
240, OOO 
May 16. 
17 
42, OOO 
446, OOO 
May 23. 
24 
62, OOO 
217,142 
May 31. 
32 
0 
280, OOO 
June 6. 
38 
205, 333 
270, OOO 
June 12. 
44 
116,875 
504, OOO 
June 19. 
S 1 
12,666 
216, OOO 
June 27. 
59 
54, 000 
41, 428 
July 3. 
<55 
11,428 
1,272, OOO 
July 11... 
73 
0 
30, 526 
July 20. 
82 
25,333 
31-336 
July 3°. 
92 
20, 571 
0 
Aug. 8. 
IOI 
0 
0 
Aug. 26. 
119 
0 
*7.837 
Sept 25. 
149 
0 
0 
Series F. 
[Rainfall: Date, Apr. 27, 28, and 29; amount, 2.54 inches. Date of collection of soil samples, Apr. 30. 
Source of soil samples: No. 15. Base of tree bearing pycnospore trap No. IV, No. 16. Base of tree bearing 
pycnospore trap No. VI.] 
Date of test. 
Number of 
days of drying. 
Number of viable spores per 
gram of soil. 
Soil sample 
N0.15. 
Soil sample 
No. 16. 
May 1. 
0 
3, 336, OOO 
490, OOO 
May 8. 
7 
820, OOO 
9^875 
May 16. 
15 
532, OOO 
53?333 
May 23. 
22 
51,428 
144, OOO 
May 31. 
30 
204,054 
68, 571 
June 6. 
3*5 
96, OOO 
95> 143 
June 12. 
42 
62, 666 
43)333 
June 19. 
49 
92, OOO 
70, OOO 
June 27. 
57 
63, OOO 
(?) 
July 3.. 
63 
42, 857 
0 
July 11. 
7i 
0 
14, OOO 
July 20. 
80 
18, 636 
0 
July 30. 
90 
11, 7 X 4 
0 
Aug. 8. 
99 
0 
0 
Aug. 26. 
117 
0 
0 
Sept. 25. 
147 
0 
0 
