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Relative tolerance of Liposcelis bostrychophila (Bad.) and L. entomophila (End.) to some organophosphorus and carbamate insecticides

Published online by Cambridge University Press:  19 September 2011

Edmund C. W. Leong  and
S. H. Ho
Edmund C. W. Leong
Affiliation:
Department of Zoology, National University of Singapore, Lower Kent Ridge Road, Singapore 0511
S. H. Ho*
Affiliation:
Department of Zoology, National University of Singapore, Lower Kent Ridge Road, Singapore 0511
*
* To whom all correspondence should be addressed.
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Abstract

A simple method for the insecticide bioassay of liposcelids is outlined. The contact toxicity of five organophosphorus insecticides (OPs) and two carbamate insecticides (CBMs) was ascertained for Liposcelis bostrychophila and L. entomophila. Liposcelis entomophila was more tolerant to all the insecticides tested than the other species. Malathion was the least toxic OPs to both species, while chlorpyrifos-methyl was the most toxic insecticide tested against L. bostrychophila. These findings are discussed in relation to the infestation of these liposcelids in rice storages.

Résumé

Une méthode simple pour l'essai biologique des insecticides contre les liposcelides est presentée. La toxicité de cinq insecticides organophosphoreux (OPs) et de deux insecticides carbamates (CBMs) contre Liposcelis bostrychophila et L. entomophila a été étudiée. Pour tous les insecticides essayés dans cette étude, L. entomophila s'est montrée plus résistante que L. bostrychophila. Contre ces deux espèces, le malathion est un des OPs moins efficaces, mais le chlorpyrifos-méthyle est l'insecticide le plus toxique contre L. bostrychophila. Ces découvertes sont evaluées par rapport aux infestations de ces liposcelides dans les entrepôts de riz.

Keywords

Liposcelis bostrychophilaL. entomophilaKD50KD95organophosphorus insecticidescarbamate insecticidesLiposcelis bostrychophilaL. entomophilaKD50KD95insecticides organophosphoreuxinsecticides carbamates
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 15 , Issue 3 , June 1994 , pp. 343 - 349
Copyright
Copyright © ICIPE 1994

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