Jan. 26,1924 
The Black-Bundle Disease of Corn 
201 
Table XVI .—Yield data from certain selections and strains of Yellow Dent corn when 
inoculated with Cephalosporium acremonium, Aplanobacter stewarti, and Gibberella 
saubinetii, the corn being grown near Bloomington, III., in IQ2I, on virgin brown silt 
loam soil of high fertility 
Character of seed. 
Inoculated with— 
Num¬ 
ber of 
plats. 
Total ac 
Control. 
re yield. 
Inocu¬ 
lated. 
Reduction fol¬ 
lowing inocula¬ 
tion. 
Odds. 
Bushels. 
Bushels. 
Bushels. 
Per.ct. 
Susceptible selection... 
C. acremonium. . 
6 
84.0 
65-7 
18.3 
21.8 
>999:1 
Good seed selection. 
.do. 
6 
88,0 
8i.« 
6. K 
7 . 4 . 
4 c:i 
Susceptible selection... 
A . stewarti . 
6 
85.6 
74.1 
D 
“■5 
13-4 
59 ii 
Good seed selection. 
.do. 
6 
84. I 
8?.o 
4 - 0 .Q 
4-1.i 
1 :i 
Susceptible selection... 
G. saubinetii . 
6 
84.6 
69.0 
1 w y 
15.6 
18.4 
158:1 
Good seed selection. 
.do. 
6 
85-7 
80.6 
5 -i 
6.0 
8:1 
Nearly disease-free 
control. 
C. acremonium. . 
14 
89.4 
77-9 
n-S 
12.9 
>999:1 
Nearly disease-free 
control. 
A. stewarti .... 
14 
93-9 
91.1 
2.8 
3 -o 
37 :i 
Nearly disease-free 
control. 
G . saubinetii . 
14 
90.4 
87-s 
2.9 
3-2 
50:1 
A further study of the field performance of these same seed lots is given 
in Table XVII. Corn grown from the susceptible seed selection, which 
was injured to the extent of 21.8 per cent, 13.4 per cent, and 18.4 per cent 
by inoculations with pure cultures of C . acremonium , A. stewarti , and 
G. saubinetii , respectively, yielded 8.6 ±1.1 bushels less sound com than 
corn grown from the good seed selection which was highly resistant to 
injury from inoculations with all three organisms. 
Table XVII .—Yield data from the susceptible and good selections and the nearly disease- 
fret control , grown near Bloomington, III., in IQ21, on infested brown silt loam soil 
of medium fertility 
Character of seed. 
Num¬ 
ber 
of 
plats. 
Acre yield. 
Increase in yield of 
marketable corn of 
good seed selection 
over susceptible 
selection. 
Increase in yield of 
marketable com of 
nearly disease-free 
check over good seed 
selection. 
Total. 
Market¬ 
able. 
Susceptible seed selection.... 
Good seed selection. 
Nearly disease-free check.... 
42 
42 
42 
Bushels. 
74. 8±o. s 
79.6±o- 7 
86.4±o. 5 
Bushels. 
46. 7 
55. i±o.8 
64.3±o. 5 
Bushels. 
Per 
cent. 
Diff. 
Bushels. 
Per 
cent. 
Diff. 
P.E. 
P.E . 
8.6dbi* 1 
18.5 
7.8 
9. 2 dbo. 9 ! 
I 16. 7 
10.3 
Additional data on the field performance of the susceptible and good 
seed selections at various points in Illinois are presented in Table XVIII. 
Although the difference in yield between these two selections was not 
large at Bloomington, nor at Peoria, where corn followed clover, yet the 
mean difference in yield at all points was 11.9 bushels, or 15.4 per cent, 
with odds of 58:1. The mean difference in yield of marketable com 
was larger. 
Since these data (Tables XVI, XVII, XVIII) show that resistance to 
the two vascular diseases (Table XVI) probably is closely associated 
with the ability to yield well in soil infested with disease-producing 
