PLATE IX 

 Pseudomonas citri 



Fig. I . — Drawing of a stained section of a portion of a grapefruit leaf bearing a young 

 canker resulting from inoculation with a pure culture of P. citri. X 250. 



Fig. 2. — Photomicrograph of P. citri stained by the Williams method for flagella. 

 X 1,000. 



Fig. 3. — Top view of a grapefruit seedling showing the results of artificial inoculation 

 with P. citri isolated from Texas specimens. 



Fig. 4. — View of the lower side of the leaves shown in figure 3. 



Fig. 5. — Top view of a grapefruit seedling showing the results of inoculation with 

 P. citri obtained from Florida specimens. 



Fig. 6. — View of the lower side of the leaves shown in figure 5. 



