VARIETAL SUSCEPTIBILITY OE OATS TO SMUTS 
9 
Table 2. — Results of inoculating seed of varieties and strains of different species 
of Avena with spores of Ustilago avenae and U. levis at the stations and in the 
years indicated — Continued 
Station and year 
Plants from seeds inoculated with— 
Species, variety, and strain 
of oats 
Ustilago avenae 
Ustilago levis 
Total 
num- 
ber 
Infected 
Total 
num- 
ber 
Infected 
Num- 
ber 
Per 
cent 
Num- 
ber 
Per 
cent 
50 
57 
103 
74 
30 
51 
32 
74 
49 
19 
28 
37 
5 
5 
21 
6 
50 
19 
38.0 
49.1 
35.9 
6.7 
16.6 
41.1 
18.7 
67.5 
38.7 
51 
45~ 
54 
34 
72 
24 
33 
48 
57 
45 
72 
75 
60 
193 
31 
*-- 
17 
14 
17 
62 
10 
31 
14 
38 
25 
19 
56 

30 
60.7 
Avena fatua: 
S. N. 143 
Aberdeen, 1920 
Brooklyn, 1921... 
Brooklyn, 1922 
Columbia, 1920 
Ames, 1920 
37.7 
25.9 
50.0 
86.1 
S.N. 290, C.I. 1779 
Aberdeen, 1919 __ 
Aberdeen, 1920 
Manhattan, 1920 
Pullman, 1920 
41.6 
93.9 
29.1 
66.7 
S. N. 375- 
Brooklyn, 1921 
.Brooklyn, 1922 
Ames, 1920 
87 
71 
88 
55 
296 
42 
90 
29 
15 
57 
39 

34 

18 

3 

1 
12 
44.8 

38.6 

6.0 

3.3 

6.6 
21.0 
55.5 
26.3 
74.6 
Avena ludoviciana: 
S. N. 72 (a variety with 
typical prostrate habit) . 
S. N.80-. 
Brooklyn, 1921 
Columbia ®© 
Aberdeen, 1920 
Brooklyn, 1921 
Columbia ® - 

15.5 
77 
23 
12 

15.5 

Aberdeen, 1919 
Aberdeen, 1920 
Pullman, 1920 
S.N. 176 
35 
12 
51 
36 
27 
11 

1 

7 
31.4 

Brooklyn, 1921 
Brooklyn, 1922... 
Columbia, 1920 
Aberdeen, 1919 
54 
51 
11 
45 
30 
67 
81 
39 
95 
36 
85 
106 
7 


1 
2 
2 

3 
12 
7 
21 
16 
12.9 


2.2 
6.6 
2.9 

7.6 
12.6 
19.4 
24.7 
15.1 
1.9 

25.9 
S.N. 180, C.I. 1780 (white- 
grained strain) . 
Aberdeen, 1920. 
Brooklyn, 1921... 
Brooklyn, 1922 
Columbia, 1920 
Ames, 1920 
33 
48 
46 
95 
82 
61 
93 
91 
90 
64 
66 
10 
6 
1 
12 
11 
•16 
22 
14 
25 
21 
7 
30.3 
12.5 
2.1 
12.5 
13.4 
S. N. 291, C. I. 1781 
Aberdeen, 1919.. 
Aberdeen, 1920 
Manhattan, 1920 
Pullman, 1920 
26.2 
23.6 
15.3 
27.8 
Avena nuda: 
Var. biaristata, S. N. 181, 
Brooklyn, 1921 
.Brooklyn, 1922 
Aberdeen, 1920 
Columbia, 1920 
Ames, 1920 
64 
80 
102 
32 
244 
57 
76 
116 
17 
3 
97 
26 
242 
49 
76 
115 
26.5 
3.7 
95.0 
81.2 
99.1 
86.0 
100 
99.1 
32.8 
10.6 
C.I. 1769.° 
252 
49 
101 
70 
67 
335 
148 
122 
249 
48 
101 
67 
67 
328 
97 
49 
98.8 
Var. biaristata, S. N. 293, 
C. I. 1770. 
Aberdeen, 1919 
Aberdeen, 1920 
Manhattan, 1920 
Pullman, 1920 
97.9 
100 
95.7 
100 
Var. inermic, S. N. 26 b 
Brooklyn, 1921 
.Brooklyn, 1922 
/Columbia @© 
\ Aberdeen, 1920 
Columbia®® 
Columbia, 1920 
Ames, 1919 
429 
258 
324 
7 
505 
136 
124 
268 
258 
1,002 
464 
• 414 
26 
288 
7 
344 
71 
75 
170 
215 
933 
439 
96.5 
10.0 
88.8 
100 
68.1 
52.2 
60.4 
63.4 
83.3 
93. 1 
94.6 
97.9 
65.9 
40.1 
183 
135 
242 
156 
273 
633 
353 
372 
354 
809 
99 
55 
97 
164 
104 
88 
43 
130 
245 
567 
340 
272 
311 
619 
65 
37 
58 
41 
57.3 
65.1 
17.7 
Ames, 1920 
, 83.3 
Var. inermis, S. N. 30 c 
Aberdeen, 1919 
'Aberdeen, 1920 
Manhattan, 1920 
Pullman, 1920 
89.7 
89.5 
96.3 
73.1 
Brooklyn, 1921 
Brooklyn, 1922 
440 
750 
103 
69 
91 
196 
402 
166 
51 
64 
73 
6 
91.3 
22.1 
49.5 
92.7 
80.2 
3.0 
87.8 
76.5 
65.6 
Var. inermis, S. N. 144 
Aberdeen, 1920 
' Brooklyn, 1921 
Brooklyn, 1922... 
67.2 
59.7 
25.0 
° This variety differs from No. 293 in possessing dark-colored paleae. 
6 A larger, more robust awnless type received under the name Elegantissima. 
c This variety was received under the name Avena chinensis Fischer. According to Koernicke and 
Werner, the Chinese hull-less oat should have one awn on the lowest flower. 
96995°— 25 f- 
