PLATE 28 
Bacterial spot of tomato: 
A.—Surface view of a leaf lesion stained to show distribution of bacteria. The in¬ 
vasion is plainly intercellular and the margin not delimited by veins. Photomicro¬ 
graph, X 66. 
B—Causal organism stained to show flagella. Photomicrograph, X 2,000. 
C* Cross section of young cotyledon lesion, showing a mass of bacteria under a 
stoma and intercellular spaces packed with bacteria. Photomicrograph, X 300. 
D.—Poured plate culture of causal organism on potato agar. 
