354 
Journal of Agricultural Research 
Vol. II, No. 5 
Table; II .—Results showing the effect of various hot-water and modified hot-water treat¬ 
ments on the viability of the spores of the head-smut organism 
Serial No. 
Treatment. 
Duration 
of test. 
Number 
counted. 
Germination. 
Duration. 
Temper¬ 
ature. 
Duration of 
presoaking. 
Min. 
0 C. 
Hours . 
Days. 
Per cent. 
I 
Control. 
(«) 
1 2 
1,225 
3-8 
l 3 
535 
4 * 5 
/ 3 
Trace. 
2 
IO 
55 
(°) 
l 4 
Trace. 
3 
20 
55 
(a) 
i 
1,500 
0 
0 
4 
IO 
60 
1 °) 
5 
3,000 
. 1 
No increase. 
5 
20 
60 
(a) 
> 
{ 3 s 
3,000 
0 
0 
6 
IO 
65 
(°) 
4 
2,500 
.04 
7 
20 
65 
( a ) 
4 
5,000 
0 
8 
Control. 
6 
2 
1,046 
9.6 
f 2 
600 
0 
9 
IO 
55 
6 
3 
1 — 
l 4 
400 
3 
f 2 
0 
IO 
20 
55 
6 
I 3 
Trace. 
l 4 
700 
2.9 
ii 
IO 
60 
8 
j 3 
3,000 
•03 
• 5 “ 
12 
20 
60 
8 
{ 3 
4, 000 
0 
\ 5 
5,000 
. 02 
13 
IO 
6 5 
8 % 
4 
3, 000 
•33 
14 
20 
6S 
8 K 
4 
5,000 
.04 
f 2 
572 
1. 6 
15 
Control. 
(a) 
5+ 
l 4 
No increase. 
l6 
IO 
55 
(a) 
{ l 
400 
0 
Trace. 
17 
20 
55 
(a) 
{ l 
500 
0 
0 
18 
IO 
60 
(a) 
{ 3 s 
550 
0 
0 
*9 
20 
60 
(a) 
s 
0 
Trace. 
20 
IO 
65 
( a ) 
4 
Trace. 
21 
20 
65 
(®) 
4 
Trace. 
22 
Control. 
6 
2 
503 
19.7 
f * 
402 
Slight. 
23 
IO 
55 
6 
3 
2 + 
l 4 
100 
30 
f 2 
650 
0 
24 
20 
55 
6 
3 
0 
l 4 
0 
25 
IO 
60 
8 
? 
0 
0 
26 
20 
60 
8 
s 
0 
0 
27 
IO 
6S 
8 ^ 
v 0 
4 
600 
•17 
28 
20 
65 
8 X 
4 
522 
0 
29 
Control. 
(“) 
{ S 
1,000 
4 
No increase. 
30 
IO 
60 
(“) 
{ s 
0 
0 
« Not soaked. 
