Bui. 1474, U. S. Department of Agriculture 
Plate 5 
Melanose on Orange and Grapefruit Twigs 
A, Severe melanose infection on very young grapefruit twigs. Such lesions may easily be 
confused with "ammoniation" 
B, Typical melanose lesions on orange twigs 
C, "Mud-cake" effect of melanose on orange twigs 
