UNITED STATES DEPARTMENT OF AGRICULTURE 

 BULLETIN No. 872 



Contribution from the Bure'au of Entomology 

 L. O. HOWARD, Chief 



Washington, D. C. 



November 11, 1920 



INSECT CONTROL 

 IN FLOUR MILLS 



By 



E. A. BACK, Entomologist in Charge of Stored-Product 

 Insect Investigations 



CONTENTS 



Mill Insect Conditions Bettered .... 1 



Incentive Leading to Insect Sanitation . 1 



Mediterranean Flour Moth 2 



Methods of Control 7 



Preventive Measures 7 



Methods of Control— continued 

 Natural Control by Parasites 

 Artificial Control Measures 



Conculsion , 



11 

 11 

 39 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1920 



