Massachusetts 

 agricultural experiment station 



Bulletin No. 283 May, 1932 



Downy Mildew of Cucumbers 



By William L. Doran 



Downy mildew is a common and important disease of cucumbers 

 in Massachusetts as well as in most of the eastern and southern states. 

 This is a report on investigations of the source of the primary infection, 

 the effect of climatic factors on the disease and on the fungus which 

 causes it, and the prevention of infection by the use of fungicides. 



MASSACHUSETTS STATE COLLEGE 

 AMHERST, MASS. 



