THE PLUM LEAF-RUST 



65 



until quite recently. An account of the Ohio experiments 

 mentioned above will be found in the Bulletin of the 

 Ohio Experiment Station for December, 1891 (v. IV, 

 pp. 216-217), and of the nursery experiments in the 

 Journal of Mycology (v. YII, No. 3). 



FIG. 34. SPRAVIXO FOR PLI'^M I^EAF-BT.IOHT. 



The Plum Leaf=rust 



Piiccinia pruni-spinoscs 

 This is a disease somewhat similar to the last. 

 Leaves affected by it become spotted with reddish above, 

 and yellowish-brown below, and when the attack is se- 

 vere the trees may be defoliated. The remedial treat- 

 ment is the same as for the leaf -blight. 

 5 



