Nov. 15, 1925 
Longevity of Teliospores of Oronartium ribicola 
909 
Table IV. — Longevity of teliospores of Cronartium ribicola 
[Figure following species indicates collection number] 
Ribes species, place of collection, and date collected 
R. nigrum (1), Wevertown, 
R. nigrum (2), Wever- 
R. triste (3), Wilmington 
N. 
Y., Aug. 1, 1923 (from 
town, N. 
Y., Aug. 1, 
Notch, N. Y. f Aug. 3, 
bushes; stored inside) 
1923 (from ground) 
1923 
Date tested 
Germination 
Columns 
Columns 
Columns 
Num- 
Per 
Teliospores 
Num- 
Per 
Teliospor es 
Num- 
Per 
Teliospores 
ber 
cent 
ber 
cent 
ber 
cent 
Aug. 8. 1923. 
« 51 
47 
XXX b 
c 28 
16 
X-XXX, 
108 
175 
mostly XX. 
Aug. 13, 1923.. 
33 
33 
xx-xxx, 
j 53 
53 
XXX_ 
c8 
9 
X. 
100 
mostly XX. 
100 
90 
Aug. 22, 1923.. 
41 
20 
x-xx, 
24 
32 
XXX. 
204 
mostly X. 
74 
Aug. 29, 1923. 
3 
2- 
XX. 
1 
20 
XX. 
155 
5 
Sept. 5, 1923. 
36 
10 
X. 
9 
3- 
X. 
16 
14 
x-xx, 
350 
370 
115 
mostly XX. 
Sept. 12, 1923. 
25 
17 
X. 
13 
5- 
x-xx, 
2 
2 
X. 
144 
267 
mostly X. 
102 
Sept. 19, 1923. 
18 
7 
x-xx, 
0 
0 
0.. 
248 
mostly X. 
n9 
Sept. 26, 1923 _ 
2 
1— 
X. 
1 
1- 
XX_ 
255 
125 
Oct. 3, 1923 . 
*2 
1— 
X..._ 
0 
0 
0.. 
239 
130 
Oct. 10, 1923 _ 
o 
0 
o_. 
0 
0 
0.. 
165 
135 
Ribes species, place of collection, and date collected 
R. glandulosum (4), Wil- 
R. rotundifolium (5), 
R. cynosbati (6), War- 
mington Notch, N. Y., 
Warrensburg, N. Y., 
rensburg, 
N. Y., Aug. 
Aug. 3,1923 
Aug. 4,1923 
6, 1923 
Date tested 
Germination 
Columns 
Columns 
Columns 
Num- 
Per 
Teliospores 
Num- 
Per 
Teliospores 
Num- 
Per 
Teliospores 
ber 
cent 
ber 
cent 
ber 
cent 
Aug. 8, 1923__ 
c13 
3 
X. 
cl 
1- 
X. 
33 
78 
XXX. 
400 
255 
42 
Aug. 15, 1923_ 
29 
72 
x-xxx, 
clO 
4 
X. 
60 
60 
XX. 
40 
mostly XX. 
235 
100 
Aug. 22, 1923. 
16 
38 
XX.. 
5 
3 
XX. 
9 
6 
XX. 
42 
150 
150 
Aug. 29, 1923.. 
11 
6 
x-xx, 
0 
0 
0.. 
18 
9 
XX. 
175 
mostly X. 
95 
195 
Sept. 5, 1923 . 
39 
24 
X-XX, 
0 
0 
0_ 
15 
6 
x-xx, 
160 
mostly X. 
180 
240 
mostly X. 
Sept. 12, 1923. 
5 
2- 
X. 
0 
0 
0_ 
6 
3+ 
X. 
300 
180 
175 
Sept. 19, 1923. 
11 
4+ 
X-XXX, 
0 
0 
0.—. 
1 
1- 
XXX. 
240 
mostly XX. 
129 
202 
Sept. 26, 1923. 
3 
2- 
X. 
7 
5- 
x-xx, 
165 
155 
mostly XX. 
Oct. 3, 1923 . 
0 
0 
0. 
1 
1+ 
X. 
U3 
94 
Oct. 10, 1923 
1 
1— 
X. . .. 
3 
1 
X. 
170 
300 
Oct. 17, 1923 d • . 
0 
0 
0. 
1 
1 
XX. 
20 
30 
Oct,. 24, 1923 d • 
o 
0 
o 
12 
• Throughout table numerator = number of telial columns which germinated; denominator — number 
of telial columns which were counted. 
* Throughout table XXX=germination of more than two-thirds of the visible teliospores; XX= germi¬ 
nation of between one-third and two-thirds of the visible teliospores; X=germination of less than one-third 
of the visible teliospores. 
«Germination in moist chambers. d No precooling. *Tests at B ethel, Vt. 
