212 
Journal of Agricultural Research 
Vol, V, No. s 
Table I .—Results of inoculations with timothy-rust urediniospores on cereals and grasses 
Date of inoculation. • 
Source of urediniospores. 
Plant inoculated. 
Number 
of leaves 
inocu¬ 
lated. 
Number 
of leaves 
infected. 
Dec. r8, 1914.. 
0 
.do. . 
,. ..do. 
.do... 
41 
0 
Jan. 26, 1915. 
.do... 
.do. 
Dec. i8 r 1914. 
A vena saliva . 
.do. 
Tan. o r 1915. 
..... do. 
.do. 
14 
Tan. i7 T 1915. 
.do. 
107 
19 
Feb. io r 1915. 
20 
1 
Dec. 18,1914.... 
.do... 
Hordeum vulgare . 
31 
0 
Dec. 24,1014. 
21 
2 
Dec. 29, 1914. 
.do. 
ii 
Tan. 26.1015... 
.do... 
.do... 
48 
Keb. i T 1015. 
s 
Dec. i8 t 1914. 
.do. 
Secede cereale . 
11 
0 
Dec. 24,. 1914. 
.do. 
.do. 
14 
0 
Dec. 29, 1914. 
.do. 
38 
1 
Feb. i T 1915. 
.do. 
39 
41 
1 
Feb. io r 1915... 
6 
. ...do. 
Apr. ii t 1915. 
.do. 
10 
Anr. 2. ion:. 
Avena elatior . 
3 
Mav 20. iqic . 
.do... 
Bromus tectorum . 
23 
Tan. T2. 1015. 
.do. 
Dactylis glomerata . 
55 
37 
Mav 1 a. ioic. 
Elymus virginicus . 
1 
Apr. n t 1015... 
.do. 
Lolium italicum . 
21 
0 
Mav 20. 1015. 
.do. 
.do. 
32 
3 
Do!..’..'.... 
.... .do. 
Lolium perenne . 
15 
4 
Do. 
.... do. 
Mar. 2. 1015. 
Hordeum vulgare a . 
Phleum pratense. .. 
48 
0 
.do. 
.do... 
40 
0 
Mar. *7. ioic. 
A vena saliva & . 
.do. 
71 
0 
Apr. it, 1915. 
A vena fatua .. 
34 
0 
Apr. 18, 1915. 
.do.... 
.do. 
15 
0 
Mav 2. 1015. 
Phataris canariensis c . 
.do... 
25 
0 
Mar. *7. 1015. 
Dactvlis glomerata . 
.do. 
40 
0 
.do... 
56 
0 
SUMMARY. 
Source of inoculat¬ 
ing material. 
Plant inoculated. 
Result of 
inocula- 
tion.d 
Source of inoculat¬ 
ing material. 
Plant inoculated. 
Result of 
inocula¬ 
tion. d 
Phleum pratense ... 
Triticum vulgare.. 
0 
IS© 
Phleum pratense.... 
Lolium italicum... 
3 _ 
S 3 
Do. 
Avena saliva ...... 
37 
Do. 
Lolium perenne ... 
Bromus tectorum.. 
8 _ 
Do. 
Hordeum vulgare.. 
Secede cereale . 
I 9 S 
i! 
Do. 
SS 
2 
Do. 
154 
Hordeum vulgare ... 
Avena sativa . 
Phleum pratense.. 
23 
0 
Do. 
Avena fatua ... 
143 
4 _ 
88 
_o 
Do. 
Avena elatior 
17 
A. 
Avena fatua . 
.do. 
86 
0 
20 
34 
Do. 
Dactylis glomerata. 
37 
Phalaris canariensis. 
.do. 
0 
5 S 
25 
Do. 
Elymus virginicus. 
1 
Dactylis glomerata .. 
0 
40 
96 
« Puccinia graminis, originally from Hordeum fubatum; on barley 8 urediniospore "generations.” 
i> Puccinia graminis , originally from Dactylis glomerata; on oats 9 urediniospore generations. 
c Dactylis glomerata rust after 13 generations on oats and one generation on Phalaris canariensis. 
d The denominator gives the total number of leaves inoculated, the numerator the number which 
developed pustules. 
