The Effect of Soap on the Toxicity of a Pyrethrum Product Known as "Red Arrow"
Author: BADERTSCHER, A. E.
Source: Journal of Economic Entomology, Volume 24, Number 1, February 1931 , pp. 268-277(10)
Publisher: Entomological Society of America
Abstract:A study of the toxicity of "Red Arrow" at varying concentrations, of potassium cocoanut fatty acid soap at varying concentrations, and of mixtures of "Red Arrow" and additional soap with "Red Arrow" variable and soap constant, and with soap variable and "Red Arrow" constant. All tested on the green spiraea aphis (Aphis spiraecola Patch). The results indicate that "Red Arrow" diluted with tap-water does not function at its maximum efficiency, probably because the surface tension of .the aqueous carrier is too high to permit sufficient penetration into the internal tissues of the insect through the breathing system. This study further indicates that the efficiency of "Red Arrow" is increased almost four times when diluted with water containing enough soap (0.4%) to condition the aqueous carrier to very nearly 30 dynes.
A study of the relative toxicity of samples of "Red Arrow" manufactured in 1927, 1928, 1929, and 1930 respectively, kept under normal storage conditions and tested October, 1930 on honey bees (A pis mellifera Linn.) and on the black bean plant louse (Aphis rumicis Linn.) This study shows that the various samples of "Red Arrow" tested have lost very little if any of their toxicity.
Document Type: Research Article
Publication date: February 1, 1931
- 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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