912 
Journal of Agricultural Research 
Vol. XXXI, No. 10 
Table IV .—Longevity of teliospores of Cronartium ribicola —Continued 
Ribes species, place of collection, and date collected 
R. nigrum 
hams, N. 
1923 
(19), Wad- 
Y., Aug. 23, 
R. vulgare, (20), Cald¬ 
well, N. Y., Aug. 26, 
1923 
R. cynosbati (21), West 
Fort Ann, N. Y., Sept. 
6, 1923 
Date tested 
Germination 
Columns 
Columns 
Columns 
Num¬ 
ber 
Per 
cent 
Teliospores 
Num¬ 
ber 
Per 
cent 
Teliospores 
Num¬ 
ber 
Per 
cent 
Teliospores 
Aug. 29, 1922_ 
316 
89 
Mostly 
XXX. 
X-XXX, 
93 
93 
XXX d . 
Sept. 5, 1923 
355 
215 
68 
100 
77 
23 
X.. 
Sept. 12, 1923_ 
315 
68 
35 
mostly XX. 
X-XXX, 
340 
61 
21 
x-xx, 
7 
2+ 
X. 
Sept. 19,1923_ 
196 
78 
27 
mostly XX. 
X-XXX, 
mostly XX. 
XXX. 
288 
47 
21 
mostly X. 
X-XX, 
285 
4 
2- 
X. 
Sept. 26, 1923_ 
289 
89 
59 
219 
2 
5- 
mostly X. 
X._._. 
214 
19 
16- 
XX. 
Oct. 3, 1923_ 
150 
105 
66 
xx-xxx, 
mostly XX. 
X__ 
41 
1 
1- 
XX.. 
121 
1 
1- 
X. 
Oct. 10, 1923.. 
160 
8 
3+ 
61 
105 
0 
0 
0__ 
118 
1 
1- 
X. 
Oct. 17, 1923 d • .. 
225 
75 
XX..... 
50 
0 
0 
0__ 
110 
0 
0 
0. 
Oct. 24, 1923 d • _ 
123 
87 
50 
XXX. 
1 
70 
0 
0 
0. 
Oct. 31, 1923 d *_ 
173 
43 
11- 
XX. 
/ 
230 
400 
d No precooling. 
• Tests at Bethel, Vt. 
Table V .—Summary of the longevity of teliospores of Cronartium ribicola 
Ribes species a 
Number of days 
living 
Per cent of columns 
germinating on 
last day tested 
Amount of germina¬ 
tion in column on 
last day tested 
i Number of days liv¬ 
ing in 1921 tests (16) 
\ 
Ribes species • 
Number of days 
living 
Per cent of columns 
germinating on 
last day tested 
Amount of germina¬ 
tion in column on 
last day tested 
Number of days liv¬ 
ing in 1921 tests (16) 
Americanum (13)_ 
h 31 
52 
XX 
Nigrum (10)_ 
647 
3 ' 
X 
Americanum (17)_ 
6 73 
21 
XX 
b 59 
Nigrum (8)_ 
66 
0 
0 
Cynosbati ( 21 ) 
35 
0 
0 
Nigrum (19)_ 
b 70 
11 - 
XX 
Cynosbati ( 6 )_ 
b 73 
3 
XX 
59 
Nigrum (7)__. 
b 87 
21 
XX 
b 79 
Glandulosum ( 11 )_ 
b 47 
6 — 
X 
Odoratum (9)_ 
44 
0 
0 
Glandulosum (4) 
69 
0 
0 
Odoratum (18)_ 
63 
0 
0 
b 59 
Glandulosum (14)_ 
b 78 
5— 
X 
Rotundifolium (5)_ 
- 19 
0 
0 
Nigrum (in house) 
Rotundifolium (15) 
57 
0 
0 
42 
(19) 
b 49 
1 — 
X 
Triste (3)_ 
41 
2 
X 
Nigrum (in house) 
Triste (12) . 
54 
0 
0 
(1).... 
64 
0 
0 
Vulgare (20)_ 
39 
0 
0 
Nigrum (from 
Vulgare (16)_ 
70 
0 
0 
ground) (2). 
57 
0 
0 
• Figure following species name is number of collection given in Table IV, 
* Living when tests were discontinued. 
