230 



AGRICULTURE 



Peaches and other stone fruits are often injured by spray- 

 ing when leaves are on the trees. 



Peach leaf-curl. This disease can be recognized by 

 the curling and arching of the leaves, which later turn 

 dark and fall. The fruit shrivels and becomes almost 



worthless. The young 

 shoots also may become 

 diseased. This fungus 

 establishes itself at the 

 time the fruit buds are 

 opening. It may be 

 prevented by spraying 

 the trees with Bordeaux 

 mixture just before the 

 buds open (Figs. 157, 

 158). 



Apple-scab. Apple- 

 scab is very common 

 throughout the country 

 during moist seasons. 

 Examine the fruit care- 

 fully during July and 

 August, and the pres- 

 ence of this disease will 

 be shown by the scabby spots that do not resemble rot. 

 There is an olive-colored growth around these. Scabby 

 spots may also occur on the leaves. The apple-scab 

 causes an enormous loss, making the apples misshaped 

 and dwarfed and often reducing their selling price by 

 half. When the scab begins, it may kill the bloom or 



FIG. 157. A PEACH TREE PROTECTED 

 AGAINST LEAF-CURL BY SPRAYING 



