150 



BACTERIA IN RELATION TO PLANT DISEASES. 



Dr. G. P. Burns has stated to me that he saw this disease in two species of cultivated 

 amaranths at Ann Arbor, Michigan, in 1901, and plated out a yellow organism, but, having 

 read my note, dropped work on it. Had he continued we might now know something more 

 definite concerning the biology of the organism and its ability to produce the disease from 

 pure-culture inoculations; also to what extent the biological characters here assigned to 

 it are correct. The only reference in literature is, I believe, the following: 



Fig. 67.* 



LITERATURE. 



SMITH, ERWIN F. The cultural characters of Pseudomonas hyacinthi, etc. Bull. No. 28, Div. Veg. Phys. and 

 Path., U. S. Dept. Agr., p. 153. 



*Fic. 67 a. Photomicrograph showing appearance of Bacterium amaranthi under a high magnification (X 

 2000). Slide 450 B 5. Vascular bundle. 



1901. 



