PLANT BACTERIA, VOL. 3. 



PLATE 12. 



Grand Rapids tomato disease. 



Plants Nos. 10 and 17 inoculated by needle-pricks with a pure culture of Aplanobacter michiganense at X on the stem Oct. 5, 1909, 

 iti the hot-house. Photographs Nov. 16. 1909, showing slow progress of the disease. 



