872 
Journal of Agricultural Research voi. xxvn, no. ii 
at 20° to 22° C. The seed was placed in an aqueous spore suspension of 
this organism for 10 minutes just previous to planting. The concentra¬ 
tion of this spore suspension was such that when a drop was placed on a 
glass slide and covered with a cover glass, about 100 spores could be seen 
in one field of the microscope, using a 4 mm. objective. 
Two strains of corn were used, both originally from Yellow Dent. 
One represented the most disease-resistant strain obtainable at the time 
and the other represented good, average seed corn that had had no 
special selection toward disease resistance. These selections were similar 
to those used in the experiments reported in Tables VI, VII, VIII, and IX. 
Tabi^B VI .—Data showing field stands and acre yields from disease-resistant and disease- 
susceptible strains of Yellow Dent corn, both grown on fields previously cropped to 
clover and scabbed wheat, respectively, at Bloomington, III., in IQ20 
PREVIOUS CROP—CEOVER 
Plat No. 
A 1.. 
A 2.. 
A 3 '* 
A4.. 
A5- 
A 6.. 
K 7 ., 
A 8., 
a 9 .. 
A 10. 
Average 
Ci. 
C2. 
c 3 - 
C4.. 
c 5 .. 
C 6.. 
£7- 
C 8.. 
c 9 .. 
C 10. 
Average.. 
Ei.. 
E 2.. 
I 3 - 
E4- 
S 5 " 
E6.. 
B7v 
E8.. 
£ 9 -- 
E 10. 
Average.. 
General 
average. 
Resistant seed. 
Susceptible seed. 
Field stand. 
Acre 
yield. 
Plat No. 
Field stand. 
Acre 
yield. 
Number 
of stalks. 
Per cent. 
Number 
of stalks. 
Per cent. 
37 
77. 1 
Bushels • 
80. 9 
B 1. 
34 
70. 8 
Busheis. 
69. 6 
42 
87. 5 
88.9 
B 2. 
39 
81.3 
75-8 
43 
89. 6 
92. 8 
B3. 
41 
8 S -4 
72.0 
39 
81.3 
88. 9 
B 4. 
41 
85-4 
81.3 
40 
83-3 
78.6 
®S. 
43 
89.6 
72. 7 
37 
77. 1 
84. 2 
B 6. 
39 
81. 3 
71. 2 
43 
89. 6 
88.9 
B 7-. 
41 
85.4 
72. r 
40 
83.3 
77. 0 
B 8. 
39 
81.3 
72. r 
39 
81.3 
88.8 
B 9 . 
42 
87.5 
85.* 
43 
89. 6 
91* 2 
B 10. 
39 
81.3 
67.3 
40.3 
84. 0 
86.0 
Average .. 
39-8 
82. 9 
74. i 
4 * 
100.0 
79-3 
D 1 .. 
40 
83-3 
68. a 
45 
93 - 8 
80. 2 
D2. 
40 
83-3 
78. 8 
39 
81.3 
78. 6 
D3.. 
4 r 
85-4 
67-3 
45 
93-8 
94.4 
I >4 . 
34 
70. 8 
69.6 
40 
83-3 
81. 0 
B S. 
40 
83-3 
62.6 
45 
93-8 
78.8 
D 6. 
36 
75 - 0 
63*4 
40 
83-3 
77.8 
D 7 . 
38 
79. 2 
73-6 
4 i 
85-4 
90.4 
D 8. 
4 i 
85. 4 
80. 6- 
4 i 
85.4 
80. 1 
D 9 . 1 
40 
83-3 
76. 7 
42 
87- S 
81. 7 
D IO. . .. ! 
40 
83-3 
69. 6 
42. 6 
88.8 
82. 2 
Average .. | 
39 - 0 
81.3 
71. o» 
43 
89. 6 
72. 0 
F 1. . 
36 
75 - 0 
69-3 
46 
95- 8 
80. 4 
F2 . 
42 
87-5 
73* 6. 
41 
85-4 
84. 0 
£3. 
45 
93-8 
85. 7 
43 
8 9 . 6 
88.7 
f 4 . 
39 
81.3 
70. 8 
44 
9 i. 7 
82. 9 
£5. 
40 
83-3 
70. 8 
40 
83-3 
77.2 
F 6 . 
39 
81.3 
70. 0 
38 
79. 2 
83.6 
£7. 
39 
81.3 
71. 2 
39 
81.3 
84.3 
F 8 . 
37 
.77.1 
72. 8 
40 
83-3 
87.4 
£ 9 -. 
35 
72.9 
70*4 
41 
85- 4 
88.1 
F 10 . 
40 
83-3 
79*9 
4 i .5 
86.5 
82. 9 
Average .. 
39-2 
81.7 
73 - 5 
4 i .5 
86.4 
83.7 
General 
average . 
39-3 
81. 9 
7 *- 9 
