Mar. 25,1914 
Imperfect Fungi from Wheat , Oats , and Barley 
479 
Table II .—Results of inoculating seed of wheat , barley, and oats with imperfect fungi 
. isolated from grain plants. 
Inoculated seed. 
Control seed. 
Test 
No. 
Species. 
Origin. 
Inocu¬ 
lated 
Date of 
planting. 
Num¬ 
ber 
plant¬ 
ed. 
Germi¬ 
nated. 
Num¬ 
ber 
plant¬ 
ed. 
Germi¬ 
nated. 
Num¬ 
ber. 
Per¬ 
cent¬ 
age. 
Num¬ 
ber. 
Per¬ 
cent¬ 
age. 
1 
Helminth osporium 
Wheat culm.... 
Wheat. 
1911. 
Nov. 21 
150 
34 
22. 6 
90 
68 
75-5 
gramineum. 
do. 
.do. 
...do_ 
Dec. 2 
72 
25 
34-8 
112 
93 
83.0 
.do. 
.. .do.... 
...do. 
78 
18 
23. 0 
78 
Si 
65-3 
4 
5 
6-1 
.do. 
1912. 
Jan. 19 
105 
64 
60. 9 
105 
92 
87.6 
do . 
.do. 
1911. 
Dec. 2 
xi2 
30 
26. 7 
112 
93 
83.0 
do . 
.do. 
Barley. 
Oats... 
.. .do. 
105 
87 
82.8 
105 
83 
79 *o 
7 
8 
.do. 
70 
SS 
78.5 
70 
57 
81.4 
.do. 
Barley leaf. 
Wheat. 
Nov. 19 
105 
62 
S 9 -o 
105 
92 
87.6 
9 
10 
It 
do. 
.do. 
Barley. 
...do. 
105 
86 
81. 9 
105 
83 
79-0 
do 
.do. 
Oats... 
70 
52 
74. 2 
70 
57 
81.4 
Fusarium culmorum.. 
Oat seedling.... 
Wheat. 
1912. 
Mar. 1 
96 
22 
22. 9 
96 
80 
83-3 
12 
13 
do. 
.do. 
Barley. 
.. .do. 
96 
63 
65. s 
96 
85 
88.5 
do . 
.do. 
Oats... 
120 
2 
1* 7 
80 
68 
85.0 
ATternftrift Rp. 
Wheat culm. 
Wheat. 
1911. 
Nov. 21 
* 5 ° 
108 
61. 2 
90 
73 
81.1 
Dec. 2 
112 
92 
82.0 
112 
93 
83.0 
l6 
Wheat seedling. 
.. .do..,. 
1912. 
Mar. s 
80 
79 
98.7 
80 
75 
93-7 
17 
18 
19 
.do. 
.do. 
Barley. 
...do. 
80 
69 
86.2 
72 
62 
86.1 
.do. 
Oats... 
...do. 
90 
77 
85. s 
90 
79 
87. 7 
Cladosporium grami- 
Oat leaf. 
Wheat. 
Feb. 28 
112 
105 
93*7 
84 
78 
92.8 
20 
21 
neum. 
.do. 
Barley. 
Oats... 
...do. 
no 
96 
87. 2 
84 
70 
83-3 
.do. 
...do. 
112 
104 
92. 8 
84 
72 
85-7 
Table II shows that the strains of Helminthosporium gramineum 
isolated from wheat and barley were decidedly pathogenic to germi¬ 
nating wheat, only 22 to 60 per cent of the inoculated wheat in five 
trials producing plants, while 65 to 87 per cent of the controls not inocu¬ 
lated produced sound plants. These results are shown further in Plate 
LXII, figure 1. Barley and oats were not affected to any appreciable 
degree so far as germination and sprouting were concerned, the inocu¬ 
lated seed producing as large a percentage of plants as the clean seed. 
Those wheat plants which developed from inoculated seed were stunted 
and not nearly so vigorous as those produced from clean seed. At the 
end of six weeks the difference in height of plants from inoculated and 
clean seed was very marked. The plants from seed inoculated with 
H . gramineum from wheat were 5.5 inches high to the tip of the second 
leaf and those from seed inoculated with H . gramineum from barley 
4.88 inches high to the tip of the second leaf, while control plants grown 
from clean seed averaged 6.45 inches high to the tip of the second leaf. 
A similar difference was noticeable in barley plants grown from inocu¬ 
lated and clean seed, although the difference was not quite as marked 
