PLANT BACTERIA, VOL. 3. 



PLATE 38. 



I f 



Stem of a large tobacco plant (No. 31). 



Inoculated with Bacterium solanacearum at X on Sept. 23, 1905. collapsed Jan. 5. Spots in lower (inoculated) part of stem are 

 black. Pith in middle part of stem is rotted out and brown-slushy. From this soft mass Bacterium solanacearum was not 

 obtained by poured-plates, but a secondry soft white-rot organism (fig. 122) which, however, was not very abundant. Stem at 

 base sound; sound also externally in the rotted part, except in one small area where the decay had reached the surface as a 

 moist brown stain. Inoculated part of stem enlarged. 



