massachusetts 

 Agricultural Experiment Station 



BULLETIN No. 202 AUGUST, 1921 



RUST OF ANTIRRHINUM 



By WILLIAM L. DORAN 



Rust is the most serious disease of snapdragons under 

 glass, and is second in importance to anthracnose in snap- 

 dragons out of doors. This bulletin presents the results of 

 studies of the causal organism of this disease and methods 

 of control. For snapdragons out of doors, the growing of 

 rust-resistant varieties is recommended. For snapdragons 

 in the greenhouse, careful control of cultural methods is 

 suggested as a preventive measure, dusting with sulfur and 

 regulation of the night temperature as means of control- 

 ling the disease after it appears. 



Requests for Bulletins should be addressed to the 



AGRICULTURAL EXPERIMENT STATION 



AMHERST, MASS. 



