Drupaceous Fruits 



77 



known practically wherever the cherry is grown, and large 

 losses are frequent. Fifty per cent loss was reported from 

 New York, and 25 per cent from Missouri in a single year. 

 Treatment is the same as for the peach brown-rot. 



Curi (Taphrina cerasi (Fcl.) Sad.). — Cherry curl is 

 closely related to that of the peach. The leaves become 

 wrinkled before they are full size, and spores are produced on 



Fig. 3S. — Brown-rot showing various stages of decay. After Clinton. 



the surface of the leaf, as they are in other curls. Instead of 

 forming flower buds and spurs, affected regions develop a 

 profusion of twigs, "witches' brooms." The disease is not 

 common in America; but should it become so, it can be held 

 in check by pruning out the diseased twigs. It is perennial 

 in the twigs and should be avoided in budding and grafting. 

 Powdery-mildew ^^' ^^ {Podosphcem oxyacanthce (DC.) De 

 Bary). — This mildew, similar to that described in connec- 

 tion with apple diseases, sometimes does damage to the 

 plum and cherry, especially on nursery stock, where it pre- 



