UNITED STATES DEPARTMENT OP AGRICULTURE 

 BULLETIN No. 707 



Contribution from the Bureau of Entomology 

 L. O. HOWARD, Chief 



Washington, D. C. 



PROFESSIONAL PAPER 



August 26, 1918 



RESULTS OF EXPERIMENTS WITH 

 MISCELLANEOUS SUBSTANCES AGAINST BED- 

 BUGS, COCKROACHES, CLOTHES MOTHS, AND 

 CARPET BEETLES 





\r 



By 



E. W. SCOTT, Entomologist, Enforcement Insecticide Act 



and W. S. ABBOTT and J. E. DUDLEY, Jr., Scientific 



Assistants, Bureau of Entomology 



CONTENTS 



Page 



Introduction . 1 



Bedbugs: 2 



Methods of Testing 2 



Killing Effects of Liquids Against 



Bedbugs 2 



Experiments with FJowders and Other 



Materials 4 



Fumigation against Bedbugs ... 6 

 Tests of Materials Against Bedbug 



Eggs 7 



Summary 7 



Cockroaches 8 



Methods of Testing 8 



Action of Materials on Roaches . . 9 

 Killing Effects of Powdered Sub- 

 stances Used as Dusts Against 



Roaches 9 



Cockroaches— Continued . 



Experiments with Liquids and Pastes 14 



Fumigation against Roaches ... 15 



Summary 15 



Clothes Moths 16 



Species Used in Experiments ... 16 



Methods of Testing 16 



Experiments Against Clothes Moths . 18 



Summary 28 



Carpet Beetles 29 



Species Used in Experiments ... 29 



Methods of Testing 29 



Experiments Against Carpet Beetles . 31 



Summary ........ v . . . 36 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1918 



