Fusarium in Tuber Rot and JVilt of Potato 
39 
bility permitted only X/200 solutions. In the case of the higher 
fattv acids and oils, the material was weighed out as though N/100 
solutions were being prepared. With these no weighings of the 
material formed were attempted, but merely differences in luxuri- 
ance of growth were recorded. To those acids which showed no 
growth with N/100 solutions, 5 cc. of 10 per cent glucose solution 
were added, making the sugar concentration 1 per cent, so as to 
determine whether the acid was merely non-usable, or whether 
it was toxic. Since it was found that some were toxic at N/100 con- 
centration, lower concentrations were made up also. The results 
are given in table IX. 
TABLE VIII 
Dry weight (in milligrams) formed with the following carbon compounds 
as carbon sources 
Fusarium trichothecioides 
Fusarium oxysporum 
Number of days 
Number of days 
6 
12 
6 
12 
Formic acid N/100. . . 
None 
None 
None 
None 
+ 5 cc. 10 per cent glu- 
cose solution 
<< 
85.5 
Acetic acid N TOO. . . . 
<< 
1.2 
10.6 
-|r-5 cc. 10 per cent glu- 
cose solution 
106 
None 
None 
Proprionic acid N TOO . 
None 
(< 
<( 
H-5 cc. 10 per cent glu- 
cose solution 
<< 
<< 
(< 
Butyric acid N/ IOO. . . 
<( 
(< 
(( 
+ 5 cc. 10 per cent glu- 
cose solution 
<< 
t( 
<< 
Glycocollic acid N TOO. 
2.5 
7.3 
20.0 
8.6 
Lactic acid N/100. . . . 
0.3 
0.6 
8.0 
23.0 
Oxalic acid N 100 
Non-weighable 
Non-weighable Non-weighable Non-weighable 
Succinic acid N/100. . . 
Non-weighableiNon-weighable 
8.5 
9.3 
Malic acid N 100 
Non-weighable 
Non-weighable 
4.5 
8.0 
Tartaric acid N/lOO. . . 
1.0 
0.93 
6.0 
4.3 
Citric acid N /100 
2.6 
6.6 
8.0 
6.6 
Aspartic acid N/200. . . 
1.6 
5.5 
6.5 
Asparagin N /200 
3.5 
3.8 
5.5 
5.3 
Tannic acid 1 per cent . 
1.0 
31.0 
0.2 
42.0 
Tannic acid 0.5 per cent 
1.6 
61.0 
1.6 
41.0 
-f 5 cc. 10 per cent glu- 
cose 
3.5 
32.0 
5.0 
47.0 
Control 0.5 gm. levulose 
82.0 
116.0 
