CONTROL OF DECAY IN PULP AND PULP WOOD 
71 
Table 15. — Deterioration of ground wood caused by 13 hymenomycetes which 
- were isolated from wood pulp 
Sample 
Culture No. 
Organism 
Per 
cent 
mois- 
ture 
Per cent loss in weight 
after— 
Physical condition of pulp 
No. 
6 
months 
9 
months 
12 
months 
196 
|Uninoculat- 
ed. 
J 102019-1 
J 82219-4 
1 82219-13 
J 82219-15 
i 102019-la 
) 10918-10 
J 4620-2 
J 4620-1 
f 61020-1 
J 61520-1 
J 6920-2 
I 6320-1 
> ' 6920-1 
) 
< 
0.5 
197 
(0 
""6." 6" 
""~jr<r 
198 
/ 
(P ax i 11 us 
\ panuoides. 
Unidentified . . 
do 
do 
do 
do 
do 
do 
do. 
I 67.3 
i" 65~3~ 
1 64.4 
i"74.~2~ 
I 67.0 
|"69.~8~ 
I 66.5 
f~73.T 
I 76.1 
J~~69.T 
I 64.4 
r~68.~7~ 
1 56.3 
f 75.0 
I 79.Y 
f 72.9 
{ 75.2 
1 77.8 
f 73.2 
{ 12 A 
1 72.3 
f 70.1 
\ 68.1 
66.4 
[ 66.7 
I 64.0 
1 62.8 
| 68.8 
67.7' 
60.6 
| 67.3 
62.2 
I 60.6 
32 
30 
31 
1.9 
~~~~2.~8~ 
Pinkish buff to russet; slightly 
brittle. 
5 
4.2 
Ochraceous buff or tawny, 
• mottled with white; slightly 
4 
6 
5.6 
------ 
21 
2.2 
22 
23 
C 1 ) 
""3.1" 
•Normal. 
26 
18.1 
25 
24 
21.1 
"~26.T 
Iciay color to clove brown; 
friable. 
27 
1.5 
28 
29 
2.3 
"~~2~3 
■Normal. 
49 
1.0 
50 
51 
1.8 
""~3.T 
Do. 
100 
27.1 
101 
102 
( 2 ) 
""49.T 
1 Cinnamon-buff to chaetura 
black; very friable. 
106 
22.2 
107 
108 
33.1 
""38."6" 
Do. 
127 
11.6 
128 
18.7 
"""l8. _ 9" 
129 
do 
do 
do 
do 
133 
2.1 
Normal, except maize yellow; 
chlamydospores on surface. 
134 
135 
3.1 
""Vai" 
163 
2.3 
164 
165 
2.4 
"~3~2.T 
■Normal. 
166 
4.1 
167 
168 
5.2 
""b'8 
•Normal color; somewhat brittle 
172 
3.3 
Ochraceous buff or tawny, 
173 
174 
5.1 
"""7/9" 
• mottled white; slightly brit- 
tle. 
Average 
68.7 
8.8 
10.6 
15.3 
1 Contaminated. 
8 This culture was lost. 
Transplants did not grow. Results of this set not included in averages. 
The loss in weight in 6 months varied from 1 to 27.1 per cent. 
The average loss in 6 months was 8.8 per cent. In 9 months from 
1.8 to 33.1 per cent was lost, the average being 10.6 per cent. In 
12 months from 2.3 to 49.5 per cent loss occurred, the average being 
15.3 per cent. (See fig. 2.) 
Table 16 records the results obtained with 11 hymenomycetes 
isolated from wood and one isolated from water. All except one of 
these fungi discolor pulp to such an extent as to damage the paper 
made from it. Eight species made the pulp more or less brittle, and 
one made it so friable as to be absolutely worthless. The moisture 
content of the samples varied from 55.8 to 72.5 per cent, the average 
being 64.7 per cent. Four of the fungi died before the end of 12 
months, these being the least virulent of this group of wood destroyers. 
The loss in weight in 6 months varied from 1.8 to 21.5 per cent, 
the average loss being 10.5 per cent. In 9 months from 2.2 to 30.3 
