PLANT BACTERIA, VOL. 2 



PLATE 1 





WILT OF CUCUMBER. 



(I) Cucumber leaf from Anacottia, D. C. affected by wilt due to Keu'illns triirlii'i/iliilux. In the center of the wilted area are 

 old gnawing: due to Diabrotica and from these the infection is believed to have originated. (2) A cucumber stem from the same field, 

 showing the disease much further advanced, although the stem and base of petioles are normal externally. Figures painted July 6, 

 1893. (3) Litmus-milk-culture of Kacilhtx traeheiphilvs (squash strain) inoculated August 28. 1905. Painted September 23. 

 (4) Uninoculated tube for companion. Stem and leaf by D. G. Paismore. 



