Occurrence of a Toxic Non-Aldrin Residue in Carrots Grown on Aldrin-Treated Soil1
Authors: GLASSER, R. F.; BLENK, R. G.; DEWEY, J. E.; HILTON, B. D.; WEIDEN, M. H. J.
Source: Journal of Economic Entomology, Volume 51, Number 3, June 1958 , pp. 337-341(5)
Publisher: Entomological Society of America
Abstract:Discrepancies in residues determined by several methods have been noted with soil applications of the insecticide aldrin to carrots. The present study was undertaken to determine the cause of the discrepancies among the three methods used: Drosophila bioassay, total chloride and phenyl azide. The experiments were designed to eliminate external contamination in the field and laboratory, to determine the efficiency of extraction of residues from carrots, and to rigidly test the methods of analysis.
Residues from direct bioassay of the carrots were significantly greater than those from chemical methods, which require preliminary extraction and chromatography. Direct bioassay and bioassay of unchromatogmphed Skellysolve-isopropanol extracts gave the same results. Bioassay residues of chromatographed extracts, however, were the same as the chemical residues, indicating that chromatography had removed a part of the toxic residue. All extractions with Skellysolve alone were less complete than those with Skellysolve-isopropanol.
Additional chromatographic analysis showed the presence of a second toxic constitutent. The sequence of chromatographic elution and the positive response of this compound to the reduction phenyl azide and total chloride methods but not to the phenyl azide method identified the compound as dieldrin. The biological evaluation of aldrin-dieldrin combinations proved the validity of equating the sum of the chemically determined aldrin and dieldrin values with the direct bioassay value.
Document Type: Research Article
Publication date: June 1, 1958
- 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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