UNITED STATES DEPARTMENT OF AGRICULTURE 
BULLETIN No. 879 
Contribution from the Bureau of Plant Industry 
WM. A. TAYLOR, Chief 
Washington, D. C. PROFESSIONAL PAPER November 15, 1920 
THE MOSAIC DISEASE OF 
CUCURBITS 
By 
S. P. DOOLITTLE, Assistant Pathologist 
Office of Cotton, Truck, and Forage Crop 
Disease Investigations 
CONTENTS 
Page 
Scope of the Investigations 1 
The Mosaic Disease ...» 1 
Cause of the Disease ..'■.( 18 
Infectious Nature of the Disease 29 
Mosaic Transmission 40 
Method of Overwintering 47 
Control Measures - . 63 
Summary 64 
Literature Cited 68 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1920 
