HOW TO INCREASE THE POTATO CROP 

 BY SPRAYING 



F. H. CHITTENDEN 



Entomologist in Charge of Truck Crop Insect Investigations 

 and 



W. A. ORTON 



Pathologist in Charge of Cotton, Truck, and Forage Crop 

 Disease Investigations 



Colorado Potato Beetle and Its Larvso, or "Slugs," Feeding 



FARMERS' BULLETIN 868 

 UNITED STATES DEPARTMENT OF AGRICULTURE 



Contribution from the Bureau of Entomology, L. O. Howard, Chief 

 and the Bureau of Plant Industry, W. A. Taylor, Chief 



Washington, D. C. 



September. 1917 



Show this bulletin to a neighbor. Additional copies may be obtained free from the 

 Division of Publications, United States Department of Agriculture 



IINQTON : QOVERNMENT PRINTING OFFICE : KIT 



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