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Residual efficacy of four organophosphate insecticides on concrete and galvanized steel surfaces against three liposcelid psocid species (Psocoptera: Liposcelidae) infesting stored products

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Collins, P. J., Nayak, M. K. and Kopittke, R. A. (2000) Residual efficacy of four organophosphate insecticides on concrete and galvanized steel surfaces against three liposcelid psocid species (Psocoptera: Liposcelidae) infesting stored products. Journal of Economic Entomology, 93 (4). pp. 1357-1363. ISSN 0022-0493

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Article Link: https://doi.org/10.1603/0022-0493-93.4.1357

Abstract

Four organophosphate insecticides, azamethiphos, fenitrothion, chlorpyrifos-methyl, and pirimiphos-methyl, were tested as surface treatments on concrete (porous surface) and galvanized steel (nonporous surface) panels (0.3 by 0.3 m) against adults of three Liposcelid psocid spp.—Liposcelis bostrychophila Badonnel, Liposcelis entomophila (Enderlein), and Liposcelis paeta Pearman. Residual efficacy of these chemicals was assessed at 30 ± 1°C, 70 ± 2% RH, and a photoperiod of 12:12 (L: D) h from 1 d after treatment (0 wk) and thereafter at weeks 1, 2, 4, 6, and 8, and then every 4 wk up to week 40. Mortality was recorded at exposure periods of 6 h and then every 24 h until end-point was achieved. L. bostrychophila was the most susceptible species to the organophosphates tested, followed by L. paeta and L. entomophila. We conclude that for long-term protection, azamethiphos is the preferred organophosphate against L. bostrychophila (up to 36 wk on steel and 24 wk on concrete storage surfaces) and L. paeta infestations only on steel surface (up to 28 wk). None of the four organophosphates tested, however, would provide long-term protection against L. paeta on concrete surface and against L. entomophila infestations on either concrete or steel storage surfaces.

Item Type:Article
Subjects:Plant pests and diseases > Economic entomology
Plant pests and diseases > Pest control and treatment of diseases. Plant protection > Pesticides
Live Archive:03 Jan 2024 23:57
Last Modified:03 Jan 2024 23:57

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