PLANT BACTERIA. VOL. 3. 



PLATE 34. 



Tobacco-leaf from the hothouse, showing the typical red-brown shriveled spots of the Granville tobacco- 1 



wilt. The remainder of the leaf was green. 



Uaftrriiim solanafearum abundant in vascular system of the midrib and in many side veins. Plant inoculated in stem, by needle- 

 pricks, on Sept. 23. 1905 using a pure culture of the North Carolina tobacco organism. Photographed Feb. 20. 1906. 

 About one-third natural sire. 



