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Synergized Bifenthrin Plus Chlorpyrifos-Methyl for Control of Beetles and Psocids in Sorghum in Australia

Daglish, G.J., Wallbank, B.E. and Nayak, M.K. (2003) Synergized Bifenthrin Plus Chlorpyrifos-Methyl for Control of Beetles and Psocids in Sorghum in Australia. Journal of Economic Entomology, 96 (2). pp. 525-532.

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Publisher URL: http://www.entsoc.org


The efficacy of bifenthrin (0.5 mg/kg) + piperonyl butoxide (7 mg/kg) + chlorpyrifos-methyl (10 mg/kg) against beetle and psocid pests of sorghum was evaluated in silo-scale trials in southeast Queensland, Australia. The pyrethroid bifenthrin was evaluated as a potential new protectant in combination with the organophosphate chlorpyrifos-methyl, which is already registered for control of several insect pests of stored cereals. Sorghum (200 metric tons) was treated after both the 1999 and 2000 harvests and sampled at intervals to assess treatment efficacy and residue decline during up to 7 mo of storage. Generally, test strains of the beetles Rhyzopertha dominica (F.), Tribolium castaneum (Herbst), Oryzaephilus surinamensis (L), and Cryptolestes ferrugineus (Stephens) were prevented from producing live progeny for up to 7 mo. The treatment failed against one strain of R. dominica known to be resistant to bioresmethrin and organophosphates.

Two malathion-resistant strains of O. surinamensis were marginally controlled with 94–100% fewer adult progeny produced. For psocids, no strains of Liposcelis bostrychophila Badonnel, Liposcelis decolor (Pearman), or Liposcelis paeta Pearman produced live progeny, although the control of a field strain of Liposcelis entomophila (Enderlein) was generally poor. Results show that this treatment should protect sorghum for at least 7 mo against most prevalent strains of grain insect in eastern Australia, although control may be limited in areas in which L. entomophila or pyrethroid-resistant R. dominica are present.

Item Type:Article
Corporate Creators:Department of Employment, Economic Development and Innovation (DEEDI), Agri-Science, Crop and Food Science, Plant Science
Business groups:Crop and Food Science
Additional Information:© Entomological Society of America.
Keywords:Synergized bifenthrin; chlorpyrifos-methyl; sorghum; beetles; psocids.
Subjects:Plant pests and diseases > Economic entomology
Plant pests and diseases > Individual or types of plants or trees > Sorghum
Plant culture > Harvesting, curing, storage
Plant pests and diseases > Pest control and treatment of diseases. Plant protection > Pesticides
Live Archive:28 Jan 2004
Last Modified:03 Sep 2021 16:43

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