Insect Disinfestation of Shelled Pecans, Almonds, and Walnuts by Gamma Radiation1

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Shelled pecans, almonds, and English walnuts were infested with the Indian meal moth, Plodia interpunctella (Hübner), the red flour beetle, Tribolium castaneum (Herbst); or the sawtoothed grain beetle, Oryzaephilus surinamensis (L.), and then treated with 10, 20, or 40 krad of gamma radiation. Reproduction by the beetles was greatly reduced or eliminated by the 10-krad treatment , and at higher levels no offspring were produced. All P. interpunctella were not eliminated by the 10-krad dosage, and I survived the 20-krad treatment. Control was complete with 40 krad. A practical level of insect control in bulk nutmeats could probably be achieved by a 20- to 25-krad treatment, but in packaged nutmeats 40 krad would probably be needed to prevent all signs of feeding damage.

Document Type: Research Article

Publication date: February 1, 1972

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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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