WHITEWASHING TREES 65 



order to cover it well. Two subsequent sprayings 

 are sufficient. The whitewash should be made as 

 thick as can be sprayed through a Bordeaux noz- 

 zle. We used a small bucket spray pump, and 

 applied about one -half a bucketful to a tree at 

 each spraying. The time required to apply the 

 whitewash will vary from five to ten minutes, 

 according to the kind of pump and to the size of 

 the trees. The more trees that are sprayed, the 

 cheaper it can be done per tree. Altogether, the 

 cost need not exceed ten cents per tree for the 

 winter." 



Following is a summary of the results: 



"In this latitude, winter -killing of the fruit- 

 buds of the peach is usually due to the unfavor- 

 able effects of freezing after they have been stimu- 

 lated into growth by warm weather, during win- 

 ter or early spring. 



"This early swelling and growth of the buds is 

 due to the warmth they receive, is practically inde- 

 pendent of root action, and may take place on 

 warm, sunny days in winter, while the roots are 

 frozen and dormant. 



"Peach fruit -buds may safely endure a tempera- 

 ture of ten_or twenty degrees below zero, provided 

 they mature well in autumn, are entirely dormant, 

 and the cold comes on gradually. 



"Zero weather may kill fruit -buds that have 

 swollen during previous warm days, or that were 

 not properly ripened in autumn, 



