UNITED STATES DEPARTMENT OF AGRICULTURE 



BULLETIN No. 707 



s^^'^^u 



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 BEDBUGS, COCKROACHES, 

 CLOTHES MOTHS, AND CARPET BEETLES. 



By E. W. Scott, Entomoloyist, 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 powders and other 



materials 4 



Fumigation against bedbugs 6 



Tests against bedbug eggs 7 



Summary 7 



Cockroaches 8 



Methods of testing 8 



Action of materials on roaches 9 



Killing effects of powdered substances 



used as dusts against roaches 9 



Pago. 



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 



SummMy ." 35 



INTRODUCTION. 



In connection with the enforcement of the insecticide act of 1910, 

 numerous substances entering into the composition of proprietary 

 insecticides have been tested against many different insects, resulting 

 in the accumulation of a large amount of data relative to the efficacy 

 of such substances. This work is conducted at the Insecticide Board's 

 Testing Laboratory, located at Vienna, Va., and directed by Dr. A. L. 

 Quaintance, of the Bureau of Entomology. 



This paper, the first of several to be published on the results of 

 such tests, presents data on the efficacy of various substances, used 

 alone and in combination, against bedbugs, cockroaches, clothes 

 moths, and carpet beetles. 



