498 



BACTERIAL DISEASES OF PLANTS 



, 





FIG. 374. Under-surface of a cauliflower leaf sprayed with formic acid 

 water (Koo) on March 24, 19]?. Photographed March 31. Natural size. 

 Shows small tumors and 'white (killed) areas. See pi. 55 J. Ag. Res. Jan. 29, 1917. 



