THE MULBERRY BLIGHT: CAUSE 345 



Bacterium mori gives hemispherical colonies which from hyaline- 

 white [correct statement] pass over into yellow [incorrect state- 

 ment as a whole, although on some media, e.g., Loffler' solidi- 

 fied blood sermn, it is somewhat yellowish]." They promised a 

 farther report but made none. We may assume that they had 

 mixed cultures on the start or soon after, viz., the parasite and 



Fig. 266. — Branch of Moras nigra (black mulberry) attacked by Bacterium 

 mori. Collected at Montpellier, France, in July, 1913. Section of axis at right. 

 After Arnaud and Secretain. 



some yellow saprophyte, and that no further report was made 

 because having turned their attention to the wrong organism 

 they could not get any more infections and became confused. 

 Non-parasitic yellow organisms are so common in the mulberry 

 lesions that following Macchiatti's misleading statements it 



