PLANT BACTERIA, VOL. 



PLATE 14, 



Wilt of Cucurbits. 

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



by James Bircfi Rorer). 



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

 first wilted and then gradually aU the other leaves. Inoculations were made on July 23 and photograph about 18 days later. Much 



