A Dry Rot of the Irish Potato Tuber 
53 
Table 14. — Summary of inoculations made on March 28, 1910s 
on Early Ohio tubers subsequently kept in an atmosphere 
of very high humidity. The tubers were examined on 
April 27. 
Part inoculated 
No. of 
tubers 
inoculated 
No. of 
inoculations 
per tuber 
Temperature 
Extent of 
rot 
Eye puncture 
3 
: 
25 to 27 ; C. 
No rot 
Surface puncture 
3 
25 to 27 C. 
No rot 
Epidermis removed 
3 
6 
25 to 27 J C. 
No rot 
Table 15. — Inoculations of Early Ohio tubers made March 29, 
1910. 
Over 
CaCl, 
Satur- ! 
ated air , 
Over 
CaCl. 
Method of 
inoculation 
No. of 
tubers in- 
oculated 
No. of in- 
oculations 
per tuber 
Tempera- 
ture 
No. of 
successful 
inocula- 
tions 
Extentf op 
rot 
Eye punc- 
ture . 
3 
6 
8 to 10 
C. 
18 
1 cm. deep 
Puncture . . 
3 
6 
8 to 10 
c. 
18 
1 cm. deep 
Epidermis 
removed . 
3 
6 
8 to 10 
c. 
0 
Eye punc- 
ture . ... 
3 
6 
8 to 10 
c. 
18 
1.5 cm. dee 
Puncture . . 
3 
6 
8 to 10° 
c. 
18 
1 cm. deep 
Epidermis 
removed . 
3 
6 
8 to 10 
c. 
11 
1 cm. deep 
Eye punc- 
ture . 
3 
6 
24 to 27' 
c. 
18 
Slight 
Puncture . . 
3 
6 
24 to 27 
c. 
18 
Slight 
Epidermis 
removed . 
3 
6 
24 to 27 
c. 
0 
It is probable that the amount of Ca01 2 employed was not 
sufficient to give extreme dryness within these chambers. 
7 
Figs. 7, 8. Inoculation of Early Ohio tubers by removal of the skin. 
Photographed four weeks after inoculation. Kept over CaCl.; the first 
week at 8° to 10° C. and then at laboratory temperature. No medium 
employed. 
