L. S. SUBRAMANIAM 



187 



Ginger. 



Inoculations with the strain from ginger were carried out on the same 

 host on both wounded and unwounded plants. The results were the same 

 in both cases, except that the action of the fungus was very rapid in wounded 

 plants. The yellowish discolouration of the leaves, the dying of the top shoots, 

 and softening of the collar were quite characteristic. The efiect of the infection 

 IS seen after about 48 hours. 



The hyphae enter the host through the stomata or any epidermal cell, and 



swell a little before penetrating (PI. VI, fig. 4) and also before passing through 



the cell walls of the internal tissues (PI. VI, fig. 3). Inoculations with 



this strain on tobacco and the other plants mentioned above gave successful 



results. 



Table II. 



Inoculations ivith strain isolated from ginger. 



