17,4 Lee: Fungicides and the Citrus-canker Organism 341 
of quicklime added in excess, and is apparently dependent upon 
the concentration of calcium hydroxide in the solution. A lime 
solution is suggested for field trial against P. citri. 
6. The foregoing tests may possibly be an index of the action 
of copper sprays against bacterial plant pathogens other than 
Pseudomonas citri, although of course P. citri may exhibit a 
peculiarity in its reaction to copper sprays different from the 
action of other bacterial pathogens. 
173259—2 
