SORGHUM SMUTS AND VARIETAL RESISTANCE 
17 
Table 2. — Results of inoculation experiments with spores of covered kernel smut on 
varieties of sorgos and grass sorghums at five stations in one or more of the seven 
years from 1915 to 1921, inclusive — Continued 
Number of plants grown 
Percentage of plants infected 
Variety, strain, and station 
1915 
1916 
1917 
1918 
1919 
1920 
1921 
191.5 
1916 
1917 
1918 
1919 
1920 
1921 
Av- 
er- 
age 
RED AMBER GROUP 
Early Rose, Mo. No. 130: 
Manhattan- . 
91 
"53 
44.0 
44.0 
Brooklyn. . _ 
60.4 
60.4 
Amarillo 
945 
27.2 
27.2 
Rosslyn . 
—\ — 
54 
.... 
.... 
.... 
55 7 


30.4 
16.8 
27.8 
2.3 
18.5 
.... 
18.5 
Early Rose: 
Columbia 
97 
83 
30.0 
Red Amber, Mo. No. 78: 
Columbia 
157 
125 
131 

Red Amber, S. P. I. No. 17548: 
Manhattan. . 
382 
348 
148 
295 
123 
670 
390 
114 

6.8 
8.3 
7.9 
1.2 
64.3 
15. 5 
5.1 
18.4 
6.0 
64.9 
7.3 
6.1 
14.5 
13.6 
13.3 
10.5 
12.5 
Amarillo . 
7.4 
Rosslyn 
60 
.... 
8.3 
.... 
8.3 
Red Amber, F. C. I. No. 1534: 
Manhattan 
227 
169 
336 
136 
150 
114 
115 
132 
138 
581 
15.4 
Amarillo 
9.0 
ORANGE GROUP 
Colman, Mo. No. 53: 
Columbia 
64.4 
Colman, S. P. I. No. 2324: 
Brooklyn.. .... .. 
20 
75.0 
75.0 
Rosslyn 
139 ... 
37.4 
29. 1 
42.1 
27.0 
35.8 
37.4 
Colman, Kansas station: 
Manhattan 
79 
57 
74 
891 
28 1 
Amarillo .. .. 
.... 
.... 
36.2 
Early Orange, Mo. No. 4: 
Columbia. 
376 
27.7 
27.7 
Early Orange, Mo. No. 77: 
Columbia. 
88 


Brooklyn.. .. ._ 
18 
44.4 
44.4 
Rosslyn.. . .... ... ... 
40 
.... 
.... 
.... 


5.0 
5.0 
Early Orange, Mo. No. 82: 
Columbia.. . 
85 

Brooklyn. .. 
34 
58.8 
50.9 
58.8 
Rosslyn .. .. 
66 
28.8 
28.8 
Early Orange, Mo. No. 208: 
Brooklyn 
! 
55 
50.9 
Columbia ... 
253 113 
m 
18.6 
42.5 

22.5 
Kansas Orange, Kansas station: 
Manhattan. . 
202 
69 
8 
9.4 
10.1 
12.5 
9.6 
Kansas Orange, F. C. I. No. 2025: 
Brooklyn 
12.5 
Orange, Mo. No. 79: 
Columbia.. 
H 


Brooklyn. .. 
10 
80.0 
55." 6 
80.0 
Rosslyn . 
39 
30.8 
30.8 
Orange, Mo. No. 92: 
Columbia ... .... 
n 
"l8 
2. 7 
2.7 
Brooklyn 
55.6 
Rosslyn 
72 
.... 
.... 
53.8 


27.8 
27.8 
Orange, Mo. No. 210: 
Columbia. _ ._ 
39 
87 
16.7 
Brooklyn... 
16 
81.3 
81.3 
Orange, F. C. I. No. 1438: 
Manhattan . 
25 
42 
200 
224 
141 
168 
48.0 
7.1 
22.5 
25.4 
52.5 
24.4 
35.8 
Amarillo . 
23.3 
Orange, C. I. No. 113a: 
Manhattan .. 
78 
641 
195 
70.5 
49.5 
100.0 
12 6 
8.7 

26.4 
Amarillo.. . 
49.5 
Rosslyn.. 
51 
37.3 
37.3 
Planter, S. P. I. No. 17539: 
Amarillo . 
4 
111 
699 
100.0 
Silverton, Mo. No. 138: 
Manhattan ... .. . . 
12.6 
9.4 
9.4 
Rosslyn 
87 
1.1 
1.1 
106639°— 25f- 
