PLANT BACTERIA, VOL. 3. 



PLATE 42. 



Brown stripes on tobacco stems attacked by the North Carolina tobacco wilt. 



These plants were inoculated from tomato stems (direct transfer of the bacterial slime) on Aug 5. 1908, by needle-pricks on 

 leaves and stems higher up. the injuries here shown being accomplished from the vascular bundles downward and out- 

 ward, the epidermis remaining unbroken. The tomatoes from which the bacterial slime was taken were witting plants 

 which contracted the disease through broken roots from soil in which diseased tobacco plants had been buried. Photo- 

 graphed Aug. 27. Compare with plate 41. fig. a. 



