Diseases of Timothy 



579 



a community cooperative proposition than one for thie individual 

 grower. The methods to be employed are those used in the treat- 

 ment of wheat for loose smut. 



Fig. 021. Old Timothy Plants Hav- 

 ing Badly Diseased Leaf Blades 

 AND Sheaths. In a Few Cases it 

 Will be Noted That the Blades 

 Are Beginning to Split. 



RUST 



The rust fungus, Puccinia PJilei-pratensis Eriks. & Henn., 

 occurs on the leaves, stems, and heads of timothy, meadow fescue, 

 orchard grass, and few other grasses. The pustules are long and 

 yellowish-brown or black. The fungus is disseminated rapidly 

 from plant to plant by the yellow uredosipores. It winters over as 

 uredospores and teleutospores, hence it developes abundantly each 

 year. 



There is no practical control of this disease except by the 

 development of resistant varieties. It has been shown that, in the 



