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Activity of Xanthene Dyes Against Black Cutworm Larvae

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Abstract:

The activity of 3 xanthene dyes (rose bengal, erythrosin B, and phloxin B) against 3rd- 6th instars of Agrotis ipsilon (Hufnagel) was investigated in the laboratory. Toxic dyesensitized photooxidation reactions occurred after larvae ingested dye impregnated diet and were exposed to one of 3 levels (9200, 4400, or 1500 lux) of flourescent light intensity. At a concentration of 5 × 10−3 M, ingestion of rose bengal resulted in the highest level of mortality, followed by phloxin B and erythrosin B. The 3 dyes were most effective at the 2 highest light intensities. Mortality in 5th–6th instars as a function of dietary concentration of rose bengal and illumination time showed that LT50 values decreased with increasing dietary concentration. Relative toxicity of rose bengal was described by means of a pseudo 2nd-order rate constant of photooxidation (k2).

Document Type: Research Article

Publication date: June 1, 1980

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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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