22 
BULLETIN 1239, U. S. DEPARTMENT OF AGRICULTURE. 
Table 17. — Results of experiments to determine the effect of depth of seeding on 
bunt infection at Pullman, Wash., in 1914- 
Inoculated Untreated Seed of Early Wilbur Wheat Sown in Bunt-Free Soil. 
Depth 
so vn 
(inches). 
Total 
plants. 
Percentage of plants. 
Percentage of bunted 
heads. 
Date of seeding. 
Partly Wholly 
bunted. bunted. 
In all 
plants. 
In partly 
bunted 
plants. 
Mar. 17 
f 0.5 
1.0 
1.5 
2.0 
2.5 
3.0 
181 
168 
190 
181 
189 
185 
31.7 
16.0 
4.2 
1.6 

1.1 
19.3 
76.2 
95.3 
97.3 
100.0 
98.4 
34 9 
88.8 
98.5 
98.4 
100.0 
99.7 
53.9 
70.0 
74.6 
61.6 
77.7 
Inoculated Untreated Seed of Hybrid 143 Sown in Bunt-Free Son,. 
Mar. 17. 
0.5 
1.0 
1.5 
2.0 
2.5 
3.0 
30 
45 
77 
78 
129 
196 
0.0 
55. 5 
18.2 
38.5 
19.4 
19.4 
3.3 
9.1 
36.4 ' 
39.7 
68.2 
71.4 
66.1 
79.3 
S3. 9 
65.8 
67.3 
68.3 
Clean Treated Seed of Early Wilbur Wheat Sown in Artificially Inoculated Soil. 
Mar. 19. 
0.5 
1.0 
1.5 
2.0 
2.5 
3.0 
104 
120 
79 
58 
62 
49 
43.3 
29.2 
34.2 
24.1 
16.1 
20.4 
22.1 
52.5 
54.4 
63.8 
80.6 
75. 5 
47.8 
66.4 
75.2 
83.8 
92.1 
91.2 
58.0 
64. 1 
65.1 
70.1 
76.0 
71.2 
Clean Treated Seed of Hybrid 143 Sown in Artificially Inoculated Soil. 
j 
f 0.5 
149 
10.7 
10.7 
16.8 
47.4 
1.0 
161 
36.0 
12.4 
35.0 
57.2 
Mar. 19 | 
1.5 
94 
42.5 
16.0 
39.8 
5'5. 4 
2.0 
96 
40.6 
33.3 
60.0 
65.5 
: 
2. 5 
69 
16.0 
68.1 
7-1. S 
69.6 
I 3.0 
59 
S. 5 
76.3 
80.9 
60.8 
Clean Treated Seed of Hybrid 143 sown in Bunt-Infested Soil. 2 
Sept. 1. 
Oct. 4. 
0.5 
1.5 
3.0 
1.5 
3.0 
216 
3. 7 

0.35 
7.0 
229 
12.23 

2. i 
1 !. 85 
100 
21.00 

2 22 
10.06 
220 1 
37. 72 
21.36 
19. 89 
63. 55 
229 , 
4 I'. ! I 
32. 3 1 
61.65 
67. 56 
215 
2L 86 
6.-). 1 1 
81.64 
75, 07 
Imutty Seed of Hybrid 143 sown ix Son. Not Artificially Inoculated. 1 
Bept. l 
| 0.5 
\ 1.5 
| 3.0 
1.5 
I 3.0 
:>77 
258 
1(15 
238 
296 
290 
3.61 
3.50 
1.76 
25. 3 1 
6.21 
0.38 
1..M 
& Id 
70.61 
92.06 
o. 82 
L. 93 
2. 78 
11.88 
96. 85 
19.60 
33. 63 
Oct. 4 
1 8. 75 
46. 60 
81.58 
79.08 
1 Not counted. The 0.5, i. and L.5 Inch sowings were badly smothered by the more rapidly growing 
Early Wilbur, the two varieties being sown In alternate rows. Many of tli<> Hybrid 143 plants produced 
but one bead. 
thoroughly Inoculated with bunl spores Sept. L. 
■ This soil was undoubtedly more or less contaminated with wind-borne spores. 
