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Effects of Gamma Radiation on the Tobacco Budworm. III. Irradiation of Eggs and Larvae1

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Abstract:

Zero- to 1-, 1- to 2-, and 2- to 3-day-old eggs and 1-, 6-, 9-, and 15-day-o1d larvae of Heliothis virescens (F.) were exposed to several dosages of gamma radiation.

Susceptibility to radiation injury decreased as insect de- velopment proceeded. Eggs irradiated at an early stage of embryonic development were considerably more suscep- tible than those exposed at a later stage. Mortality was high in larvae that hatched from irradiated egg.

Larvae were found to be less sensitive than eggs to gamma radiation. However. irradiation of larvae resulted in marked mortality in subsequent developmental stages. Many of the adults that emerged from irradiated larvae were malformed. Retardation of growth was also noticeable.

Document Type: Research Article

Publication date: April 1, 1969

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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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