Nayak, M. K. and Collins, P. J. and Kopittke, R. A. (2003) Residual toxicities and persistence of organophosphorus insecticides mixed with carbaryl as structural treatments against three liposcelidid psocid species (Psocoptera: Liposcelididae) infesting stored grain. Journal of Stored Products Research, 39 (4). pp. 343-353.
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Article Link(s): http://dx.doi.org/10.1016/S0022-474X(02)00029-2
Publisher URL: http://www.elsevier.com
Four organophosphorus insecticides, azamethiphos, fenitrothion, chlorpyrifos-methyl, and pirimiphos-methyl were each mixed with carbaryl and evaluated as structural treatments on concrete and galvanized steel panels (0.3×0.3 m) against adults of three liposcelidid psocids: Liposcelis bostrychophila Badonnel, L. entomophila (Enderlein), and L. paeta Pearman. Residual toxicities and persistence of these insecticide mixtures were assessed at 30±1°C, 70±2% r.h., and a photoperiod of 12:12(L:D) h from 1 day after treatment (0 week) and at weeks 1, 2, 4, 6, and 8, and then every 4 weeks up to week 40. Mortality was recorded at exposure periods of 6 h and then every 24 h until end-point was achieved. Significant enhancement in residual toxicities was observed in azamethiphos plus carbaryl against L. entomophila, and chlorpyrifos-methyl plus carbaryl and pirimiphos-methyl plus carbaryl against all three species on steel surfaces, compared with the individual effectiveness of these insecticides reported earlier. We conclude that combining carbaryl with either azamethiphos, chlorpyrifos-methyl, or pirimiphos-methyl as a structural treatment will provide long-term protection (up to 40 weeks) against infestation by all three psocid species on steel storage structures, whilst carbaryl with fenitrothion will give shorter protection (up to 8 weeks). On concrete structures, however, only azamethiphos plus carbaryl will provide long-term protection against L. bostrychophila (up to 28 weeks) and L. paeta (up to 16 weeks). None of the four insecticide mixtures studied would provide long-term protection against an L. entomophila infestation on concrete surfaces.
|Business groups:||Agri-Science, Crop and Food Science|
|Additional Information:||© Elsevier Science Ltd.|
|Keywords:||Liposcelis bostrychophila; Liposcelis entomophila; Liposcelis paeta; organophosphorus insecticides; carbaryl; residual toxicity.|
|Subjects:||Science > Zoology > Invertebrates > Insects|
Plant pests and diseases > Individual or types of plants or trees
Plant culture > Field crops > Grain. Cereals
Plant culture > Harvesting, curing, storage
Plant pests and diseases > Pest control and treatment of diseases. Plant protection > Pesticides
|Deposited On:||09 Dec 2003|
|Last Modified:||25 Oct 2011 06:15|
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