PLANT BACTERIA. VOL. 2. 



PLATE 4. 



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Bacterium pruni. 

 Vertical section through a small spot on a green plum 14 days from date of infection, i. e., before tissues have begun to collapse, showing tissue lifted, 

 stoma disrupted, and bacteria oozing to surface. One of the sprayed plums at Takoma Park, Md. Slide 308 E 19. For an earlier stage of 

 infection, see vol I, fig. 70. 



