38 



BACTERIAL DISEASES OF PLANTS 



FIG. 24. Buried and surface colonies of Bacterium lachri/iimnx Sm. and Bry. 

 on a rather tliickly sown +10 peptone-beef-gelatin plate: the cause of angular 

 leaf-spot of cucumber. Poured May 12, 1915. Photographed May 17. X 10. 



