Fusariiim Blight of the Soy Bean 
27 
peas instead of Xortli Carolina Black variety. The roots of each 
plant in this test were injured during the process of cultivation. 
The period of growth of these plants extended from June 29 to 
Se23tember 1, at which date the j^lants were full}^ matured. The 
results of this series are recorded in Table f (a). 
EXPERIMENT III (Series 2). — The test in series 1 was 
dipDlicated between Se]3tember 7 and Xovember 20, with no re- 
sultant increase in the percentage of infections. 
EXPERIMENT III (Series 3). — This test was in duplica- 
tion of the other series in this experiment except that the soil 
consisted of a mixture of six jDarts of coarse sand, one part of 
fine sandy loam, and one ]3art of stable manure. The results 
obtained between Sei^tember 7 and November 20 are included in 
Table 4 (b), because they show considerable increase in the 2 >er- 
centage of infection even tho the cultures used were transfers from 
cultures nearly 3 months old. 
Table 4 (a) and (b). — Results of growing soy heans and coiojyeas 
in artiflciaTly inoculated soil^ the plants having loeen 
(a) ivounded helow the surface of the soil. 
Flat 
Organism 
Host 
Total 
number 
of plants 
Diseased plants 
No. 
Percentage 
D 
F. tracheiphilum on cowpea. . 
Cowpeas 
20 . 
3 
15 
Soy beans . . . 
20 
3 
15 
E 
Fusarium sp. on soy bean. . . 
Cowpeas. . . . 
20 
6 
30 
Soy beans. . . 
20 
5- 
25 
F 
None (control) 
Cowpeas. . . . 
20 
0 
0 
Soy beans . . . 
20 
0 
0 
(b) 
Flat 
Organism 
Host 
Total 
number 
of plants 
Diseai 
sed plants 
No. 
Percentage 
G 
F. tracheiphilum on cowpea. . 
Cowpeas. . . 
20 
16 
80 
Soy beans-. . . 
20 
12 
60 
H 
Fusarium sp. on soy bean. . . 
Cowpeas. . . 
20 
13 
65 
Soy beans. . . 
20 
12 
60 
J 
None (control) 
Cowpeas 
20 
0 
0 
Soy beans . . . 
20 
0 
0 
