Effects of Gamma Radiation on Some Insects Affecting Man1

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The LD-50 of gamma radiation from cobalt-60 against the body louse (Pediculus humanus humanus L.), house fly (Musca domestica L.), American cockroach (Periplaneta americana (L.)), German cockroach (Blattella germanica (L.)), firebrat (Thermobia domestica (Pack.)), bed bug (Cimex lectularius L.), and Pharaoh ant (Monomorium pharaonis (L.)) ranged from 130 r for half- day-old house fly eggs to 190,000 r for body louse nymphs and Pharaoh ant queens. Doses required to cause 100% mortality ranged from 600 r to 250,000 r. Among the species tested, the LD-50 varied inversely with the size of the insect. Reproduction in body lice was inhibited at dosages of 75,000 r or higher. DDT resistant body lice were as susceptible to gamma rays as non- DDT-resistant lice.

Document Type: Research Article

Publication date: June 1, 1959

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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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