PLANT BACTERIA, VOL. 3. 



PLATE 2. 



Cobb's disease of sugar-cane. 



Plant No. 6, inoculated on the blades of two leaves by needle-pricks. Feb. 6, 1903, with a pure culture of Bacterium vascularum 

 derived from Australian cane. The vessels of the stem from its base nearly to the terminal bud were filled with the yellow 

 bacteria. The leaf-sheaths on the inside were also very gummy from the presence of bacterial ooze. Photographed May 1903 

 Variety, Common Green cane. 



