. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Washington, D. C. January 26,1925 FUMIGATION AGAINST GRAIN WEEVILS WITH VARIOUS VOLATILE ORGANIC COMPOUNDS By IRA E. NEIFERT, F. C. COOK, R. C. ROARK,and W. H. TONKIN Insecticide and Fungicide Laboratory, Miscellaneous Division, Bureau of Chemistry and E. A. BACK and R. T. COTTON, Bureau of Entomology CONTENTS Page Purpose of Investigation 1 Experimental Procedure 2 Effect of Volatile Organic Compounds on Weevils 3 Relation between Volatility and Toxicity of Fumigants 19 Effect of Fumigation on Weevils in the Pres- enc
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Washington, D. C. January 26,1925 FUMIGATION AGAINST GRAIN WEEVILS WITH VARIOUS VOLATILE ORGANIC COMPOUNDS By IRA E. NEIFERT, F. C. COOK, R. C. ROARK,and W. H. TONKIN Insecticide and Fungicide Laboratory, Miscellaneous Division, Bureau of Chemistry and E. A. BACK and R. T. COTTON, Bureau of Entomology CONTENTS Page Purpose of Investigation 1 Experimental Procedure 2 Effect of Volatile Organic Compounds on Weevils 3 Relation between Volatility and Toxicity of Fumigants 19 Effect of Fumigation on Weevils in the Pres- ence of Grain 24 Fire Hazard from Fumigation 28 Page Effect of Fumigation on Milled and Baked Products 34 Additional Fumigation Tests with Ethyl Acetate and Carbon Tetrachloride. 35 Eflect of Ethyl Acetate-Carbon Tetrachloride Fumigation on Germination of Seeds ... 38 Summary 38 Literature Cited 39 WASHINGTON GOVERNMENT PRINTING OFFICE 1925. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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