Bui. 1474, U. S. Department of Agriculture 
Plate 6 
Types of Injury on Oranges and Grapefruit 
A and B, Oranges affected with "ammoniation." This blemish is easily confused with 
melanose 
C, Grapefruit showing Bordeaux-oil injury. This is a rather common type of spray injury 
D, An unusual type of Bordeaux-oil injury on orange. It has been observed on experimentally 
sprayed plots only, and there but rarely 
E, Sulphur sunburn on grapefruit. This type of injury occurs commonly during the summer 
months following applications of sulphur sprays. Applications of sulphur within about 
10 days before or after an application of oil emulsion is almost certain to be followed by 
this type of burn 
