. Department bulletin. Agriculture; Agriculture. Washington, D. C. May 9, 1923 ABSORPTION AND RETENTION OF HYDROCYANIC ACID BY FUMIGATED FOOD PRODUCTS. By E. L. Griffin, Assistant Chemist, and I. E. Neifert, Junior Chemist, Insecticide and Fungicide Laboratory, Miscellaneous Division, Bureau of Chemistry; N. Perrine, Assistant in Plant Fumigation, Federal Horticultural Board, and A. B. Duckett,1 Scientific Assistant, Stored-Product Insect Investigations, Bureau of CONTENTS. Introduction 1 Review of literature 2 Purpose of investigation 4 Experimental work 4 Summary 15 Bibliography
. Department bulletin. Agriculture; Agriculture. Washington, D. C. May 9, 1923 ABSORPTION AND RETENTION OF HYDROCYANIC ACID BY FUMIGATED FOOD PRODUCTS. By E. L. Griffin, Assistant Chemist, and I. E. Neifert, Junior Chemist, Insecticide and Fungicide Laboratory, Miscellaneous Division, Bureau of Chemistry; N. Perrine, Assistant in Plant Fumigation, Federal Horticultural Board, and A. B. Duckett,1 Scientific Assistant, Stored-Product Insect Investigations, Bureau of CONTENTS. Introduction 1 Review of literature 2 Purpose of investigation 4 Experimental work 4 Summary 15 Bibliography 16 INTRODUCTION. Hydrocyanic acid, in the gaseous form, is used extensively in the United States as a fumigant for the destruction of insects and rodents, particularly the brown rat {Mus norvegicus). Probably the earliest recorded use of this gas for killing insects3 was that by J. T. Bell (4),4 who in 1877 employed it to rid an insect cabinet of insect pests. Credit is given to Dr. D. W. Coquillet for being the first to suggest the use of hydrocyanic acid gas for destroying insects on plants. In 1886, while employed as an agent of the United States Depart- ment of Agriculture, he began experiments with it which later showed its value for the destruction 01 scale insects infesting citrus trees Since 1886 the use of hydrocyanic acid gas as a fumigant has been extended greatly, until it now includes the fumigation of dwellings, barracks, etc. ), for the destruction of certain insects which are ordinarily classed as vermin, such as roaches, water bugs, and bed- bugs, and the fumigation of warehouses and mills (7, 8) against certain insects that destroy food products. More recently this gas 1 Deceased. * H. L. Sanford assisted in the fumigation work and J. J. T. Graham assisted in making the analyses of the stored grains. As the plants and plant products coming in at the various ports of entry from foreign countries frequently are infested with insects new to the United States,
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