. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Contribution from the Bureau of Chemistry CARL L. ALSBERG. Chief. jfCftf^1?-f(. Washington, D. C. PROFESSIONAL PAPER July 28, 1919 THE ADULTERATION OF INSECT POWDER WITH POWDERED DAISY FLOWERS (CHRYS- ANTHEMUM LEUCANTHEMUM L.). By R. C. RoAEK, Assistant Chemist for the Insecticide and Fungicide Board, Insecticide and Fungicide Laboratory, Miscellaneous Division, and G. L. Keenan, Microanalyst for the Insecticide and Fungicide Board, Micro- chemical Laboratory. CONTENTS. Adulteration of insect powder 1 Uses for Chrysant
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. Contribution from the Bureau of Chemistry CARL L. ALSBERG. Chief. jfCftf^1?-f(. Washington, D. C. PROFESSIONAL PAPER July 28, 1919 THE ADULTERATION OF INSECT POWDER WITH POWDERED DAISY FLOWERS (CHRYS- ANTHEMUM LEUCANTHEMUM L.). By R. C. RoAEK, Assistant Chemist for the Insecticide and Fungicide Board, Insecticide and Fungicide Laboratory, Miscellaneous Division, and G. L. Keenan, Microanalyst for the Insecticide and Fungicide Board, Micro- chemical Laboratory. CONTENTS. Adulteration of insect powder 1 Uses for Chrysanthemum Leucantheviuin 2 Insecticidal action of Chrysanthemum. Lell~ canthemum 3 Page. Chemistry of Chrysanthemum. Leucan- themuin 3 Morphology of Chrysanthemum Leucan- themum 6 Summary 8 ADULTERATION OF INSECT POWDER. Almost from the time that it first appeared as an article of com- merce, insect powder has been subjected to adulteration with a great variety of substances. Flowers of other plants of the family Com- positse naturally suggested themselves for this purpose, particularly those of the genus Chrysanthemum, to which the three species of genu- ine insect flowers^ belc-ng. Of all the species of Chrysanthemum, G. Leucanthemum probably has been one of those most often utilized for the sophistication of insect powder, a'nd in the course of the ex- amination of commercial insect powders for the Insecticide and Fungi- cide Board, its presence has been frequently detected. This plant, popularly known as "ox-eye daisy," "field daisy," "white weed," and 1 "Insect powder" consists of the powdered flower heads of any of the following species of Chrysanthemum: (1) Chrysanthemuvi (Pyrethrum) cinerariwfolium (Trev.) Bocc. ; (2) Chrys- anthemum (Pyrethrum) roseum Web and Mohr. ; (3) Chrysanthemum Marshallii Asohera (synonym, Pyrethrum carneum M. B.) (Insecticide Decision 1, Insecticide and Fungicide Board, U. S. Department of Agriculture, AugTis
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