Composition of Fluorides and Fluosilicates Sold as Insecticides

Authors: CARTER, R. H.; ROARK, R. C.

Source: Journal of Economic Entomology, Volume 21, Number 5, October 1928 , pp. 762-773(12)

Publisher: Entomological Society of America

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Samples of fluorides and fluosilicates representing the products of 14 manufacturers in the United States were examined chemically and microscopically. Both of these materials may be obtained in a satisfactory degree of purity. In solution all the fluosilicates give an acid reaction; whereas the sodium fluorides show a neutral or alkaline value.

It is believed that the observed variations in the apparent toxicity to insects of different brands of commercial sodium fluosilicate are owing to factors other than variations in fluorine content. Variations in size of crystals cause variations in cubic inches per pound, dusting qualities, adhesive:1ess, and rate of solution, properties which greatly influence the efficacy of a dust insecticide.

Variations in foliage-burning properties of different brands of commercial sodium fluosilicate are likewise probably the result of variations in crystal size.

Document Type: Research Article

Publication date: October 1, 1928

More about this publication?
  • 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.
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