446 
Journal of Agricultural Research voi. xxvn. No. r 
Tabw® X .—Infection of wheat, spelt, and emmet by IJrocystis tritici produced by inoculat¬ 
ing the seed with dry spores and sowing in the greenhouse at Arlington Experiment 
Farm, Rosslyn, Va., during one or more of the three years, igig, ig2Q, and igzi 
19x9-20 
X920-2X 
X 92 I -32 
Average number 
Crop and 
variety. 
Source 
or 
C. I. 
No. 
Plants. 
Culms. 
Plants. 
Culms. 
Plants. 
of infected plants. 
Total. 
In¬ 
fect¬ 
ed. 
Total. 
In¬ 
fect¬ 
ed. 
Total. 
In¬ 
fect¬ 
ed. 
Total 
Inf 
fect- 
ed. 
Total 
In¬ 
fect 
ed. 
Years 
aver¬ 
aged. 
\ 
Hants. 
1 
In¬ 
fect- 
ed. 
WINTER 
WHEAT. 
China. 
180 
No. 
P.d. 
No. 
P. cl. 
No. 
CO 
P.cL 
2« O 
No. 
OQl 
P. rf. 
ft 7 
No. 
O 
P.d. 
II. X 
41 . 2 
2 
No. 
P.<*. 
5 A 
Flint. 
66x2 
J w 
60 
25.0 
O 
60s 
u O 
y 
17 
14 
2 
22 
O 
3 * 4 
28.6 
O . 
Ful caster. 
6162 
5 C 
O 
165 
O 
4 * 5 
O 
O 
5 
Fulcaster. 
Tenn. 
44 
C2 
TT. C 
269 
lift 
l. *7 
*4 
IC 
O 
3 
2 
6 
a. ft 
Fultz. 
3598 
SS 79 
34*8 
5 i& 7 
ac. a 
364 
£7 
78.9 
3-8 
6.8 
93-1 
54-4 
I. O 
*5 
16 
x6 
17 
104 
18.8 
O 
66 
2 
Sr 0 
58.4 
5 . O 
Gipsy. 
O 1 ’ 0 
57 
Cl 
34 u 
201 
3 
2 
Goens. 
59 
116 
366 
1.094 
I* I 
87.1 
c. 0 
2 
< 
*• y 
6.6 
89.* 
75.6 
T 5 
Harvest Queen 
Do... 
48 
4 X 
85.4 
75.6 
434 
420 
79.5 
73.8 
88.5 
3 
1 
5 
24X 
51 
Honor. 
6161 
<2 
O 
^ 200 
O 
8 
12. c 
2 
X 
Hussar. 
4843 
6553 
5406 
5608 
5146 
1974 
4463 
5824 
5879 
5880 
3489 
1915 
5596 
5976 
SS82 
3527 
eo66 
46 
29 
14 
O 
1 
O 
O 
Do. 
O 
1 
O 
O 
Ulini Chief.... 
58 
45 
54 
61 
0 
348 
284 
369 
1 CO 
0 
O 
2 
O 
O 
Jones Fife. 
86.7 
0 
75-7 
0 
X 4 
42.9 
2 
45 
2 
763 
2* 2 
Kanred. 
37 
S’ 4 
2X7 
ft 
**r 
2 
2 
Martin. 
9.8 
2. 0 
12 
60 
TC 
0 
6 
A 2 
O 
Do. 
O 
i 
0 
Mealy. 
9 . O 
196 
T O 
Cl 
T *1 C\ 
0*71 
7 
T 1 5 
T 9 
xo. 6 
O 
P-1066. 
■A* m 
A* V/ 
55 
17. U 
• 7 
*5 
6 
* 5 * 0 
O 
3 
1 
* « 
O 
P-1068. 
IS 
14 
O 
1 
O 
O 
Poole. 
ft 
189 
O 
56 
62 
A C 
ft 
o 
Purplestraw.. 
W 
66.x 
3*3 
42 C 
42 . 6 
A 4 
3 
1 
41 
66.1 
Red May. 
O 
ft 
242 
267 
313 
410 
O 
T A 
0 
Red Rock. 
Red Wave.... 
43 
O 
222 
O 
45 
SO 
48 
0 
72.9 
0 
O 
36 . I 
O 
*4 
13 
0 
3 
3 
I 
O 
35 
0 
0 
72.9 
0 
Treadwell. 
45 
IO 
T 7 
O 
2 
Turkey. 
SPRING 
WHEAT. 
5 ° 
4°5 
*7 
2 
Baart.. 
1697 
AOQQ 
45 
35-6 
93-0 
O ft 
251 
17. X 
84.O 
6 
55 
124 
CO 
29.1 
98.4 
e t 
219 
S 4 I 
9 - I 
94 * 5 
T *7 
2 
32 
188 
32.0 
95.4 
7-3 
6.3 
2.6 
33 -1 
66.4 
S1.0 
50.0 
0 
XX. 0 
Bobs. 
30 
16 
14 
14 
86.7 
31.3 
28.6 
14 . 2 
Bunyip. 
COI 2 
4 0 
AO 
^57 
158 
210 
3 
Cedar. 
,4117 
4 y 
e 2 
A* U 
ft 
0 
5 y 
60 
62 
64 
47 
61 
40 
ss 
46 
60 
S6 
S6 
63 
61 
58 
64 
C7 
5 - 1 
6.7 
O 
*77 
2.3 
O 
3 
9 
8 
2 
Chul. 
2227 
4991 
4119 
Calif. 
w 
s. 
223 
370 
242 
176 
227 
187 
342 
97ft 
3 
2 
Comeback. 
CowraNo. 3... 
Defiance. 
48 
41 
43 
0 
92.7 
88.4 
2x1 
264 
317 
0 
89.8 
52.7 
43-8 
87. 2 
24.6 
50.0 
0 
13-0 
* 4-8 
81.4 
9-5 
3a X 
0 
3-7 
*4 
15 
31 
* 4 * O 
93.3 
0 
3 
3 
2 
42 
79 
53 
20 
0 
12 
Dicklow. 
3663 
6480 
5129 
2398 
4733 
4066 
3641 
3019-3 
1584 
1970 
4293 
4981 
x 
Early Defiance 
Florence. 
Galgalos . 
43 
44 
At 
6 
0 
O 
183 
157 
264 
273 
23s 
505 
0 
0 
0 
17 
19 
16 
26 
45 
15 
X2 
T 1 
0 
31.6 
3 
3 
Hard Federa¬ 
tion. 
4/ 
Si 
So 
(fT 
72. C 
V 
68.1 
•9 
2.4 
1.5 
98. 2 
ICO 
5. 5 
95 -a 
95-7 
80.8 
97.8 
O 
3 
113 
xox 
6 , 
ft 
85.0 
66.9 
4-7 
5 A 
Tittle Club.... 
Marquis. 
2.0 
7.8 
4-2 
324 
3 
3 
Pacific Blue- 
stem . 
48 
206 
O' * 
A . O 
270 
27C 
1.8 
O 
52 5 
3 
a 
Peliss. 
•r* y 
O 
169 
322 
33* 3 
0 
y 
0 
7* 4 
Propo. 
SI 
CT 
35-3 
2. 0 
88.9 
247 
185 
207 
16,6 
62.5 
29.8 
100 
51.9 
8.5 
92-7 
A 
2 
V 
eg 
50.4 
T *1 5 
Sonora. 
. C 
16 
39 
5C O 
55 
White Federa¬ 
tion . 
4 S 
84. 5 
50 
247 
45. V 
3 
5 
X28 
* 7 * 7 
95.5 
y7* 4 
3 
EMMRR. 
Black Winter. 
«337 
40 
0 
108 
0 
x 
O 
O 
SPELT. 
Alstroum. 
1773 
30 
IO. 0 
197 
2.0 
X 
1 
zo. 0 
■ \ 
I 
The percentage of infection for the same strains of many varieties was 
found to be much higher when grown in the greenhouse than when grown 
