Apr. is, 1914 
Pycnospores of Chestnut-Blight Fungus 
73 
Table II. — Longevity tests of pycnospores in soil stored in culture room in 1913 — Contd. 
Series K. 
[Rainfall: pate, May 21, 22 , 23, and 24; amount, 3.24 inches. Date of collection of soil samples, May 26. 
Source of soil samples: No. 22. Base of tree bearing pycnospore trap No. I. No. 23. Base of tree bearing 
pycnospore trap No. IV. No. 24. 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 
No. 22. 
Soil sample 
No. 23. 
J Soil sample 
No. 24. 
May 27 . 
0 
3, 760, OOO 
4, 480, OOO 
2,270,333 
June 4 . 
8 
1, 300, OOO 
1, 530, OOO 
1,050, OOO 
June 12. 
16 
3 s . 571 
578, OOO 
270, OOO 
June 19. 
23 
52, OOO 
160, OOO 
82,285 
June 27. 
31 
I, 611,428 
90, OOO 
206, 666 
July 3. 
37 
SS 3 .714 
322, OOO 
92,571 
July 11 . 
45 
0 
* 45 , 454 
0 
July 20. 
54 
62,OOO 
7 °, 454 
0 
July 3 °. 
64 
28, OOO 
0 
II, OOO 
Aug. 8 . 
73 
0 
0 
0 
Aug. 26. 
91 
0 
0 
5,000 
Sept. 25 . 
‘ 121 
0 
0 
0 
Summary. 
No. of soil sample. 
Number of viable 
spores per gram of 
soil before drying. 
Number of days 
spores remained 
viable (longevity 
limit). 
Number of viable 
spores per gram of 
soil in last test 
showing presence 
of viable spores. 
I, 209, 500 
2,948, OOO 
92 
20,571 
1 7 > 857 
119 
3 , 336 ,000 
90 
11,714 
490, OOO 
71 
14, OOO 
17 . 
4,106, 666 
1, 196, OOO 
71 
68,148 
18. 
71 
46,OOO 
8, 890, 000 
2, 832, OOO 
98 
79 
5,000 
12,413 
21. 
2, 640,OOO 
70 
25 , 925 
22. 
3,760, 000 
64 
28, OOO 
4,480, OOO 
54 
7 °, 454 
2,270,333 
9 1 
5,000 
