Correspondence of the LC50 for Arsenic Trioxide in a Diet-incorporation Experiment with the Quantity of Arsenic Ingested as Measured by X-ray, Energy-dispersive Spectrometry

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The LC50 of arsenic trioxide to sixth-instar Choristoneura occidentalis, Freeman was estimated in a diet-incorporation bioassay. The LC50 was compared with levels of arsenic actually present in dead larvae, dead pupae, and surviving adults as measured by X-ray, energy-dispersive spectrometry (XES). Results of these experiments suggested that larvae fed until a threshold value of arsenic caused them to cease feeding. Apparently, individuals that had accumulated sufficient metabolic reserves and consumed less than a lethal concentration of arsenic trioxide developed into pupae or adults of subnormal weight. The value of the feeding cessation threshold as measured by XES appeared to correspond to the LC50 for the larvae estimated by probit analysis.

Document Type: Research Article

Publication date: October 1, 1985

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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.
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