THE PLUM LEAF-RUST 



65 



until quite recently. An account of tlie Ohio experiments 

 mentioned above will be fouud in the Bulletin of the 

 Ohio Experiment Station for December^ 1891 (y. lY^ 

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

 Journal of Mjxology (v. VII, Xo. 3). 



FIG. 34. SPRAVIXG FOR PLU^I LE AF-El.lGHT. 



The Plum Leaf=rust 



Puccinia pruni-spinosm 

 This is a disease somewhat similar to the last. 

 Leaves affected by it become spotted with reddish above, 

 and yellowish-brown below, and w^hen the attack is se- 

 vere the trees may be defoliated. The remedial treat- 

 ment is the same as for the leaf-blight. 

 5 



