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Laboratory and field tests of temephos abate on mosquito larvae and nontarget organisms in rice fields in malaysia



Laboratory and field tests of temephos abate on mosquito larvae and nontarget organisms in rice fields in malaysia



Southeast Asian Journal of Tropical Medicine & Public Health 13(4): 646-653



The toxic effects of Abate (temephos) on mosquito larvae [vectors] and non-target organisms were studied in the rice-field and in the laboratory. In the laboratory tests, Culex tritaeniorhychus larvae and cladoceran zooplanktons (predominantly Diaphanosoma and Moinodaphnia species) were highly susceptible to Abate with LC50 values of 0.27 and < 0.10 ppb, respectively. Other non-target species in decreasing degree of susceptibility to Abate were copepods (Tropodiaptomus spp.), Aplocheilus panchax and Tubifex worms. In field study, Abate at concentrations, 60, 100 and 200 g/ha is effective in maintaining the rice-fields free of Anopheles and Culex mosquitoes for at least 2 days. No mortality was observed for Aplocheilus panchax and Tubifex worms at the above concentrations; populations of cladoceran zooplankton and copepods were reduced up to 7 days posttreatment.

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Accession: 005787429

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PMID: 6189198


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