CHAPTER XIX 



FROST INJURIES, SECONDARY BLOOM, AND FROST 

 PROTECTION 



THE value of knowing what can be expected of frosted 

 bloom, or fruit just set, and second-crop bloom is realized 

 only when one grasps the significance of the early spraying 

 in a successful fight against the codlin-moth. Many 

 times a crop of fruit that would have brought the owner 

 profitable returns, if cared for, has been lost because the 

 grower at first thought it would not be worth spraying. 

 Omit the first spraying in an orchard bearing a partial 

 crop, and it practically means the loss of the crop no 

 matter how thorough the later applications of poison 

 may be. The seasons of 1907 and 1908 in the inter- 

 mountain West afforded excellent opportunities for the 

 observing fruit-grower to educate himself on these points, 

 but perhaps the opportunity has passed some persons 

 unnoticed. 



From the observations of these two seasons we may say 

 that it is almost impossible to state at just what tem- 

 perature injury takes place, for other factors besides 

 temperature have a part in determining the extent of 

 injury. While much time was given to the collection 

 of data, as to minimum temperatures and amount of 

 damage at particular times and in particular localities, 

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