FROST PROTECTION. 343 



ence may be regarded as an indication that the fruit has 

 been frosted, as they are not known to be caused in any 

 other way. 



When touched by frost over a small area, the frosted 

 portion of the rind assumes a light color. Blue-mold 

 soon attacks the fruit and its destruction is complete. 



Frequently citrus fruit may not be sufficiently in- 



Photo by Ensminger. 



Fig. 77. Oranges dropped by the effects of cold. 



jured to show on the rind, and yet the rind may be injured 

 or its nature changed in such a way as to permit the evap- 

 oration of the juice. After a time, nothing is left in the 

 fruit except a chaffy mass of juice-sacks. On the surface 

 the fruit may appear all right, yet it may have so deterio- 

 rated in value as to be worthless. 



In the handling and marketing of frosted fruit, grow- 

 ers cannot be too careful. If it is suspected that fruit has 

 been touched by frost, it should not be shipped until it is 

 determined absolutely that the fruit has not been injured. 



