Protection of Wheat Seed with Diatomaceous Earth

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Laboratory tests were made to determine the relative effectiveness of dosages of diatomaceous earth proportional to 4, 6, and 8 1bs. per ton of grain in preventing or controlling insect infestations in wheat seed. Effectiveness of treatments was tested against the rice weevil, Sitophilus oryzae (L.); the granary weevil, Sitophilus granarius (L.); the lesser grain borer, Rhyzopertha Dominica (F.); the confused flour beetle, Tribolium confusum Jacquelin duVal; the saw-toothed grain beetle, Oryzaephilus, surinamensis (L.); and the flat grain beetle, Cryptolestes pusillus (Schönherr).

Tests were made under constant conditions of 80°±1. and 60%± 5% relative humidity. Untreated control samples of wheat were completely riddled by the end of 6 months after initial exposure to insects. Results show that 4 Ibs. of diatomaceous earth per ton or grain would prevent infestations for 6 months, and 6 1bs. per ton would last 9 months. The 8-lbs.-perton treatment was still effective when the experiment was terminated 12 months after initial exposure to insects. The results indicate that diatomaceous earth offers promise as a means of protecting seeds against insects, and it was concluded that more extensive trials should be undertaken with this material.

Document Type: Research Article

Publication date: June 1, 1963

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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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