26 
BULLETIN 1284, U. S. -DEPARTMENT OF AGRICULTURE 
The results of the inoculation experiments with kafir are shown in 
Table 5. 
Table 5. — Results of inoculation experiments with spores of covered kernel smut 
on varieties of kafir at five stations in one or more of the seven years from 1915 
to 1921, inclusive 
Number of plants grown 
Percentage of plants infected 
Variety, strain, and station 
1915 
1916 
1917 
1918 
1919 
1920 
1921 
1915 
1916 
1917 
1918 
1919 
19201921 
i 
Aver- 
age 
Blackhull, Mo. No. 2: 
290 
"""7 
19.3 
| 
19 3 
85.7 
85 7 
Blackhull, Mo. No. 17: 
Columbia - 
304 
178 
191 
112 
106 
121 
99 
95 
49 
31 
15.8 
53.9 
44.5 
68.8 
68.9 
51.2 
57.6 
7.4 
2.0 
12.9 
i 
15.8 
Blackhull, Mo. No. 33: 
1 
46 8 
Blackhull, Mo. No. 34: 
46 
Blackhull, Mo. No. 35: 
Columbia.. . 
"II 
"16 
. 58 
1 
i 
51.2 
Blackhull, Mo. No. 69: 
57.6 
Blackhull, Mo. No. 73: 
97" 3 
12 9 
27.3 
Rosslyn 
20 



18.3 
.... 
15.0 
15.0 
Blackhull, Mo. No. 85: 
Columbia . . - 
82 
IS 3 
Brooklyn. .. 
.... 
25. 25 O 
46 
.... 

....... 
n o 
13 
Blackhull, Mo. No. 203: 
Brooklyn. . . . 
19.0 
19.0 
Blackhull, C.I. No. 71: 
136 
213 
51 
80 
108 
7.4 
2.8 
43. 1 25. 
3 7 
10. 5 
62 
19.4 
19.4 
98 
161 
.... 
225 
12.2 
8.1 
.... 
16.0 
12 6 
30 
118 
•-- 

Blackhull, C.I. No. 204: 
103 
41.7 
24.4 
36 
121 

61.1 
61. 1 
319 
"469 
94 
.... 
12.6 
3.8 
9.3 
15.9 
23.7 
5.6 
26.0 
30.5 
22.5 
26.0 
Rosslyn 
33. 6-.._ 
10.fi' 7.4 
33.0 
Blackhull, C.I. No. 207: 
95 
80 
97 
107 
59 
18 
151 
687 
16 2 
19.3 
19 
53 
.... 
2i. i 
21. 1 
Blackhull, F. C. I. No. 2026: 
Brooklyn ... . - 
45.3 
45.3 
Blackhull (Africa), C. I. No. 321: 
104 
163 
131 
67 
14.4 
14.7 
22. 9 64. 2 
24.1 
Brooklyn. .. 
17 
41.2 
41.2 
136 
250 
.... 
197 
8.8 
11.2 

51.3 
24.2 
59 
90 
81 
60 
"3.1 ::: 
'51. 1 
3.4 
Blackhull Dwarf, C. I. No. 628: 
51.1 
Dawn, Mo. No. 18: 
117 
157 
12 
48 
111 
122 
16.2 
13.4 
8.3 
27.1 
18.0 
8. 2 13. 6 
16.2 
Dawn, C.I. No. 340: 
14.3 
Brooklyn.. .. 
43.3 
43.3 
•84 
184 
44 
752 
21.4 
23.4 
43.2 
13.6 
17. 1 
Rosslyn . 
565 
41 
11 
.... 
42. 3 
42.3 
Dawn, F. C. I. No. 1932: 
36.6 
18 ? 
36.fi 
Progressive: 
Manhattan 
55 
125 
122 
175 
23.6 
36.0 
3 3 
10.1 
Sunrise, C. I. No. 472: 
137 
50 
107 
6.6 
6.0 
39.3 
21.1 
39." 3 
22.9 
178 
39.3 
98 
136 
49 
535 
13.3 
12.2 
2.6 
14.2 
13.2 
15.3 
42.9 
33 8 
23.4 
42 ? 
21.fi 
Rosslyn 
551 
9.3 
29.2 
29. 2 
White, Mo. No. 19: 
Columbia .. .. 
204 
74 
76 
113 
85 
74 
103 
65 
2 
140 
64 
159 
112 
9.3 
White, C.I. No. 252: 
24.7 
10.81 124.5 
25.2:18.6 28.6 
15. & 
White (African), C.I. No. 314: 
21.4 
39 
17.9 
17.9 
144 
125 
22 
381 
11. 8 
32.022.719.7 
20.4 
Rosslyn 
L- 
61 
.... 
L— 
31.1 
.... 
31.1 
