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Lead oxide (PbO), lead carbonate, lead sulfate, and lead chromate are slow acting toxic compounds for tent caterpillars. The order of toxicity is as follows: Chromate> sulfate>carbonate>oxide. There appears to be a direct relationship between toxicity and the molecular weight; an increase in molecular weight increases toxicity. The amount of lead in the body of the insect at the time of death, exclusive of digestive tract, per milligram of body weight, remains constant regardless of the amount of lead oxide eaten.
Document Type: Research Article
Publication date: February 1, 1929
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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.