16 
BULLETIN 1284, U. S. DEPARTMENT OF AGRICULTURE 
Amber sorgo probably have been produced from this Chinese intro- 
duction. Later importations of sorghums were made from China, 
but no additional saccharine varieties. 
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 
Number of plants grown 
Percentage of plants infected 
Variety, strain, and station 
1915 1916 
1917 
191S 
1919 
1920 
1921 
1915 
1916 
1917 
1918 
1919 
1920 
1921 
Av- 
er- 
age 
BLACK AMBER GBOUP 
Black Amber, Mo. No. 70: 
Columbia. 
104 
99 
28.8 

14 8 
Brooklyn... 
31 
51 
6.5 
58.8 
50."6 
55.8 
7.4 
6.5 
Black Amber, Mo. No. 127: 
Brooklyn 
' 
58 S 
Rosslyn.. 
85 
" 
4L7 
Black Amber, Mo. No. 209: 
Columbia 
1 
90 
"42 
113 
108 
20.0 
20.0 
Brooklyn.. . 
50.0 
Black Amber, F. C I. No. 7038: 
Brooklyn. 
I 
55.8 
Black Amber, S. P. I. No. 32384: 
Manhattan 
117 
57 
416 
200 
112 
94 
113 
167 
107 
124 
608 
411 

27.4 
12.3 
19.7 
21.0 
14.3 
23.4 
40.7 
15.6 
1.9 
13.7 
5.3 
9.0 
17.0 
Amarillo 
8.6 
Collier, Mo. No. 47: 
Columbia 
17.2 
Brooklyn i 
37 
12 
43.2 
43.2 
Collier, S. P. I. No. 19770: 
Brooklyn... ' ' 
66.7 
Rosslyn ... . 
82 
42.7 
42.7 
Collier, Kansas station: 
Manhattan... . ' 
104 
54 
74 
172 
101 
30 
32.7 
48.1 
23.0 
29.1 

46.7 
31.7 
4.8 
1.4 
35.8 
Amarillo .. 
293 
126 
365 
34.3 
Black Dwarf, Kansas station: 
11 5 
Amarillo 
10.2 
Dakota Amber, Mo. No. 48: 
Columbia . 309 
226 
16.5 
21.2 
15.6 
Dakota Amber, Mo. No. 141: 
Rosslyn . . .. 
70 
44.3 
.... 
44.3 
Dakota Amber, F. C. I. No. 152S: 
Manhattan 185 
Amarillo .. 1 156 
"81 
36 
42 
.... 
.... 

15.1 
9.0 
12.1 
41.7 
21.4 

19.5 
11. S 
Early Amber, Mo. No. 207: 
Brooklyn . . ... | 
79 
12.7 
12.7 
Early Amber, S. P. I. No. 28026: 
Rosslyn. . 
8 
.... 
.... 
.... 
61.6 
50.8 
37.5 
37 5 
Folger Early, F. C. I. No. 1480: 
Manhattan . 
73 
61.6 
Amarillo.. .. 
i m 
50.8 
Rosslyn 1 
67 
23.9 
9.4 
23.9 
McLean, S. P. I. No. 34985: 
Brooklyn 
85 
9 4 
Rosslyn .. '■ 
31 
10 5 
.... 
16.1 
16.1 
Minnesota Amber, Mo. No. 3: 
Columbia. . . 392 
10 5 
Brooklyn 
?6 
30.8 
30.8 
Minnesota Amber, Mo. No. 9: 
Columbia.. 266 
Minnesota Amber, Mo. No. 52: 
Columbia . 
193 
103 
137 
9.8 
14.5 
10.7 
2.9 
9.8 
q 
Brooklyn.. 
21 
"II 
"44 
14.3 
"9." I 
"6.8 
14 3 
Minnesota Amber, Mo. No. 93: 
C olumbia 
91 
15.4 
15 4 
Brooklyn 
9.1 
Rosslyn J 
105 
.11.4 
9.5 
9 5 
Minnesota Amber, F. C. I. No. 1 
01950: 
Manhattan - 
105 
11.4 
6 8 
Amarillo 
279 
4.7 
4 7 
Rosslyn 
87 
13.8 

13.8 
