. Bulletin of the Department of Agriculture. Agriculture. JTU^'^ Washington, D. C. September 8, 1920 EXPERIMENTS ON THE TOXIC ACTION OF CERTAIN GASES ON INSECTS, SEEDS, AND FUNGL By I. E. Neifbrt, Junior Chemist, Insecticide and Fungicide Laboratory, Bureau of Chemistry, and G. L. Garrison, Cotton Entomologist, Bureau of Entomology. CONTENTS. Introduction 1 Experimental work: General procedure 2 Phosgene 4 Arsine , 5 Cyanogen chlorid 7 Experimental work—continued. Chloropicrin 9 Illuminating gas 13 Carbon monoxid 13 Summary 13 Conclusions 13 INTRODUCTION. Experiments made at American
. Bulletin of the Department of Agriculture. Agriculture. JTU^'^ Washington, D. C. September 8, 1920 EXPERIMENTS ON THE TOXIC ACTION OF CERTAIN GASES ON INSECTS, SEEDS, AND FUNGL By I. E. Neifbrt, Junior Chemist, Insecticide and Fungicide Laboratory, Bureau of Chemistry, and G. L. Garrison, Cotton Entomologist, Bureau of Entomology. CONTENTS. Introduction 1 Experimental work: General procedure 2 Phosgene 4 Arsine , 5 Cyanogen chlorid 7 Experimental work—continued. Chloropicrin 9 Illuminating gas 13 Carbon monoxid 13 Summary 13 Conclusions 13 INTRODUCTION. Experiments made at American University by the Bureau of Entomology of the United States Department of Agriculture, in cooperation with the Chemical Warfare Service of the United States War Department, on the action of certain toxic gases upon the body louse (Pediculus corporis De G.) indicated that further inves- tigation with other insects might be profitable, especially since very little work had been done with respect to their action on insects,^ fungi, and seeds. Accordingly a committee ^ was appointed to plan a series of experiments to determine the value of these gases for fimiigating purposes. The gases of war value and the apparatus used at American University were obtained through the courtesy of the Chemical War- fare Service. The collection and rearing of the insects and observa- 1 Bertrand, Brocq-Rousseau and Dassonville (Compt'. rend., 169 (1919): 441, 880,1059, lOGl, 1428) have conducted some experiments with chloropicrin on bedbugs and charancon (weevils); Moore (J. Econ. Entomol., H (1918): 357) has done sopie work with chloropicrin against bean weevil {Bruchus obtectus Say.), Angoumois grain moth iSitotroga'cerealdla Oliv.), Indian meal moth (Plodia interpunctella Hbn.), Mediterranean flour moth (Ephestia kuehnklla Zell.), and confused flour beetle (Tribolium confusum Duval), as well as (J. Lab. Clin. Med., 3 (1918): 267) for fumigating clothing for the destruction of the clothes louse
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