PLANT BACTERIA, VOL. 3. 



PLATE 3. 



Cobb's disease of sugar-cane. 



Plants 8 and 12, inoculated Feb. 6. 1903, with a pure culture of Bacterium vascularum plated out of sugar-cane received from 

 New South Wales. Inoculated by needle-pricks only, each plant in two leaf-blades at some distance from the stem. Most 

 of the leaves dead and dry when photographed, stem bundles filled with the honey-yellow slime. The terminal bud pushing 

 out sidewise may be seen near the base of each cane. Photographed May 1903. About one-twelfth natural size. Com- 

 mon Green cane. 



