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Resistance to Grain-Protectant Insecticides in Coleopterous Pests of Stored Cereals in Queensland, Australia

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Samples of field populations of Cryptolestes spp., Oryzaephilus surinamensis (L.), Rhyzopertha dominica (F.), Sitophilus oryzae (L.), and Tribolium castaneum (Herbst) were collected from central storages, grain merchants, and farms in Queensland, Australia. First-generation progeny of each sample were exposed to grain treated with commercial formulations of insecticides. These concentrations were chosen to detect new resistances to fenitrothion in T. castaneum, S. oryzae, and Cryptolestes spp., resistance to bioresmethrin + piperonyl butoxide (PB) in R. dominica, and increases in the frequency of resistance to fenitrothion and chlorpyrifos-methyl in O. surinamensis. No new resistance to fenitrothion was detected in T. castaneum, S. oryzae, or Cryptolestes spp. High-level resistance to bioresmethrin + PB (resistance factor ≍130) was detected at three central storages but not on farms or with grain merchants. High-level resistance to fenitrothion was present in almost all O. surinamensis samples from central storages and in more than half the farm samples collected. Resistance to chlorpyrifos-methyl that could result in control failures was detected in 60% of farm samples and in about 40% of samples collected from central storages.

Document Type: Research Article

Publication date: April 1, 1993

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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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