Beet. 



265 



deaux mixture during the growing season, and when the beets 

 are stored all the leaves should be removed. 



Rust ( Uromyces Betce, Pers.). Description. This disease is at 

 present most destructive in Europe and in California. It is 

 easily recognized by the rusty-red powder that is abundantly 

 produced upon the affected portions of the leaves. A similar 

 disease attacks carnations and hollyhocks. 



FIG. 47. Beet leaf spot. 



Treatment. Although it appears that no definite experiments 

 have been made in this country for the control of beet rust, it 

 is probable that the fungus may be held in check by continued 

 applications of the Bordeaux mixture. The related forms found 

 upon other plants yield to treatment, and applications made 

 at the first appearance of the trouble should prevent it from 

 becoming serious. 



Scab (Oospora scabies, Thax.). This disease also attacks 

 potatoes, causing them to be scabby. The only known remedy 

 for the trouble in beets is to avoid ground in which the fungus 

 is known to exist. 



