18 
BULLETIN 1284, U. S. DEPARTMENT OF AGRICULTURE 
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 
1915 
1916 
1917 
1918 
1919 
1920 
1921 
Av- 
er- 
age 
SUMAC GROUP 
Dwarf Ashburn, Mo. No. 50: 
Columbia .. . . . 
259 
370 
111 
105 
55 
28.2 
39.2 
37.8 
42.9 

27. 1 
Sumac, Mo. No. 11: 
389 
10.3 
10.3 
Sumac, Mo. No. 55: 
Columbia.- . 
40.0 
Brooklyn. ...... . ... 
15 
94 
80.0 
63.8 
80.0 
Sumac, Mo. No, 88: 
Rosslyn ... . ... . 
65 
.... 
.... 
.... 
.... 
36.9 
36.'9 
Sumac, F. C. I. No. 1831: 
Brooklyn 
63.8 
Rosslyn _. . _ I 
99 
34.5 
8.1 
6.6 

12.5 
10.9 
13.1 
13.1 
Sumac, S. P. I. No. 35038: 
Manhattan . 
200 
86 
197 
.... 
56 
506 
i 
24.3 
Amarillo. . 
14 
9 7 
MISCELLANEOUS GROUP 
Denton, Mo. No. 144: 
Rosslyn ...... . 
.... 
.... 
7.1 
.... 
7.1 
Gooseneck, Mo. No. 91: 
Columbia. ... 
30 

Rosslyn.. ... ... 
22 

32.1 


Gooseneck, Agrost. No. 2652: 
Manhattan 
28 
58 
32.1 
Brooklyn . 

Honey, Mo. No. 66: 
Columbia . 
92 
25 
32 
26.1 


20.5 
Honey, Mo. No. 97: 
Columbia . ... 

Rosslyn . .. .. .. 
86 
39 
........ 
.... 
.... 
..... 
7.0 
2.6 

7.0 
Honey, Mo. No. 133: 
Rosslyn.. . 
2.6 
Honey, F. C. I. No. 9576: 
Brooklyn . 
1 
9 

Amarillo . 
505 
1.2 
1.2 
From Java, S. P. I. No. 39276: 
Brooklyn .. „_ 
1 
13 
14 
46.2 
64.3 
46.2 
Dwarf from Java, S. P. I. No. 39269: 
64.3 
Amarillo .... _•__ . 
265 
25.7 
25.7 
Rosslyn .. . 
56 
.... 
.... 
.... 
25.0 
33.3 
25.0 
White African, F. C. I. No. 1546: 
Brooklyn... .. _ .. . 
60 
33 3 
Rosslyn 
70 
8.2 
20.2 
8.9 

30.0 
30.0 
GRASS SORGHUMS 
Sudan grass, Mo. No. 56: 
Columbia _ . . 
632 
99 
90 
600 
9.8 
Sudan grass, Mo. No. 57: 
Columbia ... .. 
• 
8.9 
Sudan grass, Mo. No. 89: 
Columbia 

Sudan grass: 
Manhattan... ... 
500 
116 
200 
165 
152 
.... 

3.2 
2.6 
1.0 



.... 
2 1 
1.1 
Most of our sorgos came from South Africa. Leonard Wray, an 
English sugar planter at Natal, South Africa, procured 16 varieties 
of sorgos (3) grown by the various native tribes and called " Imphee." 
These w r ere introduced into the United States, and in 1857 they were 
grown in Georgia and South Carolina. Most of the sorgos now grown 
in the United States except those of the Amber type have descended 
from this introduction. The original strains were soon widely dis- 
tributed over the United States. Hybridization and selection re- 
