Fusariiim Blight of the Soy Bean 
11 
The contrast in appearance of five healthy and five diseased 
plants is sliown in Figure 3, D. E. The same type of sandy loam 
soil Tras used in both jars and the plants in each were grown out 
of doors under the same conditions. The plants shown in figure 
E were naturally infected from naturally infested soil and were 
typical of the diseased plants in 32 other jars of the 80 in the 
test. A considerable number of the leaves have fallen from the 
diseased plants, a portion of the petioles persist without leaflets, 
the plants are dwarfed, and there is no evidence of wilting in 
any part of the plants. The foliage which persists on these plants 
is yellow as contrasted with the normal leaf green of healthy 
plants. 
Fig. 2 — A. A diseased stem of soy bean, showing the roughened appearance caused 
by the irregular covering of sporodochia. 
B. Interior of healthy (unstained) stem of soy bean. 
C. Interior of diseased (discolored) stem of soy bean. 
The occasional absence of a definite wilting of the leaves 
has been noted in other wilt diseases. Orton (19, p. 10), in speak- 
ing of the cowpea disease caused by F. tracheiphilum^ says : ‘‘The 
term ‘wilt' is somewhat misleading, as the leaves usually drop off 
before there is any conspicuous wilting. The name was applied 
