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MASSACHUSETTS 



AGRICULTURAL EXPERIMENT STATION 



0):.; 



Bulletin No. 221 December, 1924 



THE SMUT DISEASE OF ONIONS 



By P. J. Anderson and A. Vincent Osmun 



This bulletin records six years' experiments on the control of smut, the most 

 destructive disease of onions in New England and presents practical recommenda- 

 tions based on these experiments. It also includes an account of the origin, liistory 

 and economic importance of the disease and the development of the causal organism. 



Requests for Bulletins should be addressed to the 



AGRICULTURAL EXPERIMENT STATION 



AMHERST, MASS. 



3600-2-4-25 Order No. 817 



