Insect Resistance of Chlorpyrifos-methyl and Permethrin-treated Film Overwraps on Cases of Packaged Food

Authors: Highland, Henry A.; Cline, Daniel L.; Simonaitis, R. A.

Source: Journal of Economic Entomology, Volume 79, Number 3, June 1986 , pp. 775-778(4)

Publisher: Entomological Society of America

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Paperboard shipping cases containing individual meals in plastic pouches were wrapped in polymer films treated with permethrin or chlorpyrifos-methyl. Wraps were sealed and shrunk with heat, after which the cases were stored for 30 months in rooms heavily infested with 11 species of stored-product insects. Because chlorpyrifos-methyl killed all insects in the test room, separate rooms had to be used for the two treated films. Permethrin-treated film, while not toxic to Tribolium castaneum (Herbst) in bioassays, prevented damage to the plastic pouches for 30 months, and no live insects were found in these cases. Pouches in wrapped control cases were scarred by insects within 3 months and insect penetrated pouches were found in unwrapped cases at 6 months. Pouches scarred by insects were found in cases wrapped in chlorpyrifos-methyl-treated film at 15 months, and live insects were found in the cases at 18 months. Live insects were found in wrapped control cases at 6 months, and scarred pouches were present at 9 months. Unwrapped cases contained insect-penetrated pouches at 9 months. Chlorpyrifos-methyl-treated film remained toxic to T. castaneum for <15 weeks in bioassays. Adjacent untreated film wraps and surfaces of untreated cases were toxic for <11 weeks because of translocation of chlorpyrifos-methyl. At 24 months, 18.1% of the original chlorpyrifos-methyl treatment was found in the film and cases, while at the same time 62.1% of the original permethrin treatment was found in the film.

Document Type: Research Article

Publication date: June 1, 1986

More about this publication?
  • 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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