PLANT BACTERIA. VOL. 2. 



PLATE 14. 



Wilt of Cucurbits. 

 Cucumber-plants inoculated with B. tracheiphilus in summer of 1903 (hothouse, U. S. Department of Agriculture, 



by James Birch Rorer). 

 Infections were by means of needle-pricks, using pure cultures. In each case needle-pricks were eon fined to a single leaf-blade. This blade 

 first wilted and then gradually all the other leaves. Inoculations were made on July 2J and photograph about lS days later. Much 

 reduced. 



