A survey of the chemical composition of the commercially available fluorine compounds was made. Fifty-seven samples of fifteen different materials were received from sixteen different sources. The percentage purity of these compounds in general was of a high order. The principal fluorine compounds that are now used as insecticides are sodium fluoride, sodium fluosilicate, barium fluosilicate, sodium fluoaluminate, potassium fluoaluminate and "calcium fluosilicate compound." A few years ago some of these compounds were unavailable. Others were variable in composition, and their high density and other physical properties made them ill-suited for spraying and especially for dusting. At the present time, however, pure fluorine compounds are available, and their physical properties have been improved by admixture of silica and in other ways so that they are quite satisfactory for spraying and dusting purposes.
Document Type: Research Article
Publication date: December 1, 1932
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Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.