Bacterial Spot of Cowpea and Lima Bean 
Plate 
A. —Agar-plate surface colony, with smaller submerged colonies at left. X 5 
B. —Surface colony on a very dry agar, showing lobed margin and surface sculpturing. X 20 
C. —Surface colony such as that shown in A, showing internal pattern. X 17 
D. —Cowpea leaf lesion, showing that the veins do not limit the spread of the invasion. X 9 
E. —Infection extending along the veinlets in a cowpea leaf. X 9 
F. —Cross section of hypocotyl of cowpea, showing bacterial invasion of xylem elements as a result 
of infection proceeding from a cotyledon lesion. X 34 
CEREAL INVESTIGATIONS. 
