56 
E-VLLETIX 934, U. S. DEPARTMENT OE AGRICULTT'RE. 
Table VI. — Results of parallelinoculation with Rheosporangium aphanidermatus 
and Pythium debaryanum on pine seedlings in autoclaved soil. 
Experiment number, host, and inoculating fungus.« 
Number 
of pots. 
Results. 
I 
Emerged Damping- Survival 
(per cent off (per (per cent 
ofseed). j cent). , ofseed). 
No, 30, Pinus ponderosa: 
Rheosporangium, strain 229 . 
Pythium, 2 strains 
Controls 
No. 31, Pinus banksiana: 
Rheosporangium, strain 229. 
Pythium, strain 225 
Controls 
No. 58, Pinus banksiana: 
Rheosporangium, strain 229 ■. 
Pythium, 8 strains ' 
Controls 
No. 59, Pinus banksiana: 
Rheosporangium, strain 229 
Pythium, 8 strains 
Controls 
No. 61, Pinus banksiana: 
Rheosporangium, strain 351 
Pythium, 2 strains 
Controls 
No. 61, Pinus banksiana and beets in same pots: 
jSjff [Rheosporangium, strain 351 
No. 61, beets alone: 
Rheosporangium, strain 351 
No. 62A, beets: 
Rheosporangium^™ I?. ......... ....... 
Pythium, 2 strains 
Controls 
No. 62A, beets: 
Kheosporangimn^g?;;;;;;;;;;;;;;;; 
Controls 
No. 62A, beets and Pinus banksiana in same pots: 
Beet^} Rheosporangluin ' qtrain 229 - - - - 
g^^JRheosporangium, strain 351 
B^s} C ^ol< 
No. 62B, Jack pine: d 
Eheosporanrfu^gl?::::::::::::::::::: 
Pythium, strain 258 
Controls 
No. 66, Jack pine: 
Rheosporangium^ I?;;;;;;;;;;;;;;;;;;; 
Pythium, 47 strains and substrains 
Controls 
No. 67, Jack pine: 
Eheosporandumpgi!?-.;;:;;;::;::;:;:;:: 
Pythium, 47 strains and substrains 
Controls 
No. 68, Red pine: 
Rheosporangium{?™£ jg9 
(strain 351 
Pythium, 17 -trains and substrains 
Controls 
Per pot. 
23 
14 
20 
12 
43 
Per o-pot 
unit. 
46 
2.6 
78 
46 
15 
64 
16 
2 
60 
I 70 
5 
235 
25 
235 
23 
5 
235 
18 
50 
c27 
107 
51 
87 
105 
124 
86 
101 
Per pot. Per pot. 
22 
(*) 
8S 
1 
35 
83 

20 
78 
1 
14 
22 
33 
78 


14 
10 
100 

16 
40 
7 
41 
Per o-pot 
unit. 
45 
1.3 
78 
41 
10 
64 
10 
1 
59 
38 
83 
105 
124 
63 
104 
a Location of the inoculum: In experiment 30, at one point at the edge of each pot: in experiment 31, 
over the entire pot; in all other experiments, over one-quarter the area of each pot. 
b The breakage of the one seedling not killed while sprouting prevented the determination of result-. 
c Double seed density in these pots: emergence and survival figures halved to allow direct comparison 
with other units. This high seed density may explain in part the higher loss in strain 351 than in strain 229. 
d Experiment 62B was conducted at the same time as 62A, but with a different soil. 
Table VI shows that in experiments 30 and 67 the loss was less in 
the Rheosporangium pots than in the controls and that in experiment 
G8 the results were entirely negative, while in the remaining seven 
