CONSPECTUS: PREVALENCE AND DISTRIBUTION 



59 



FIG. 41. Bacterial canker on leaves of grape-fruit from Florida: (1) A natural 

 infection, 1914; (2) an inoculation of 1914. Both leaves were deposited in the 

 Pathological Collections, B. P. I., U. S. Department of Agriculture, in June, 1914, 

 by H. E. Stevens of Florida. No. 2, designated as a " pure-culture inocula- 

 tion," was supposed by Stevens to have been caused by his fungus (Phoma or 

 Phyllocticta) which is present, but is not the parasite. 



