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Mulakwa Kamuliwo - One of the best experts on this subject based on the ideXlab platform.
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the efficacy of vectron 20 wp Etofenprox for indoor residual spraying in areas of high vector resistance to pyrethroids and organochlorines in zambia
ISRN Preventive Medicine, 2013Co-Authors: Emmanuel Chanda, Alister Kandyata, Javan Chanda, Faustina N Phiri, Lucy Muzia, Mulakwa KamuliwoAbstract:The selection of insecticide resistance in malaria vectors has the potential to compromise any insecticide-based vector control programme. To ensure that the insecticides used for indoor residual spraying and insecticide-treated nets in Zambia remain effective and their choice is evidence based, insecticide resistance surveillance and monitoring are essential. This study assessed and compared the residual efficacy of Etofenprox (Vectron 20 WP), an ether pyrethroid, at 0.1 g/m2 with pyrethroids: bifenthrin (Bistar 10 WP) and lambda-cyhalothrin (Icon 10 CS) at 25 mg/m2 for indoor residual spraying. We also assessed the resistance status of Etofenprox to local malaria vectors, An. funestus s.s and An. gambiae s.s, using World Health Organization standard protocols. The residual efficacy of Vectron 20 WP on cement, rendered walls of houses lasted for four months with 100% mortality. By the eighth month, the killing effect had reduced to 73.8% compared to 63.3% for bifenthrin and 77.0% for lambda-cyhalothrin. Susceptibility tests using standard World Health Organization assays on An. gambiae s.s showed susceptibility to Etofenprox (0.1%) but some resistance was detected to Anopheles funestus s.s. The product is recommended as an ideal insecticide for indoor residual spraying for malaria control in Zambia as part of a resistance management programme in selected areas of the country.
Emmanuel Chanda - One of the best experts on this subject based on the ideXlab platform.
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the efficacy of vectron 20 wp Etofenprox for indoor residual spraying in areas of high vector resistance to pyrethroids and organochlorines in zambia
ISRN Preventive Medicine, 2013Co-Authors: Emmanuel Chanda, Alister Kandyata, Javan Chanda, Faustina N Phiri, Lucy Muzia, Mulakwa KamuliwoAbstract:The selection of insecticide resistance in malaria vectors has the potential to compromise any insecticide-based vector control programme. To ensure that the insecticides used for indoor residual spraying and insecticide-treated nets in Zambia remain effective and their choice is evidence based, insecticide resistance surveillance and monitoring are essential. This study assessed and compared the residual efficacy of Etofenprox (Vectron 20 WP), an ether pyrethroid, at 0.1 g/m2 with pyrethroids: bifenthrin (Bistar 10 WP) and lambda-cyhalothrin (Icon 10 CS) at 25 mg/m2 for indoor residual spraying. We also assessed the resistance status of Etofenprox to local malaria vectors, An. funestus s.s and An. gambiae s.s, using World Health Organization standard protocols. The residual efficacy of Vectron 20 WP on cement, rendered walls of houses lasted for four months with 100% mortality. By the eighth month, the killing effect had reduced to 73.8% compared to 63.3% for bifenthrin and 77.0% for lambda-cyhalothrin. Susceptibility tests using standard World Health Organization assays on An. gambiae s.s showed susceptibility to Etofenprox (0.1%) but some resistance was detected to Anopheles funestus s.s. The product is recommended as an ideal insecticide for indoor residual spraying for malaria control in Zambia as part of a resistance management programme in selected areas of the country.
M A Ansari - One of the best experts on this subject based on the ideXlab platform.
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impact of Etofenprox vectron 20 wp indoor residual spray on malaria transmission
Indian Journal of Medical Research, 2009Co-Authors: U Sreehari, Raj K. Razdan, P K Mittal, A P Dash, M A AnsariAbstract:wk. Spraying of Etofenprox signifi cantly reduced the density ( P wk. Spraying of Etofenprox signifi cantly reduced the density ( <0.001) and proportion of parous P<0.001) and proportion of parous P An. culicifacies mosquitoes (P mosquitoes (P mosquitoes ( <0.05) in the experimental village. There was a signifi cant reduction in malaria P<0.05) in the experimental village. There was a signifi cant reduction in malaria P cases in the experimental village during the post-spray period when compared to the control village (P (P ( <0.05). No adverse effect was reported by the spraymen and inhabitants during and after the spray. P<0.05). No adverse effect was reported by the spraymen and inhabitants during and after the spray. P Interpretation & conclusion: Indoor residual spray of Etofenprox (0.1 g/m 2 ) with an interval of three months in between two rounds of spray produced the desired impact in reducing the indoor resting density of vector mosquitoes and also in curtailing malaria transmission in the sprayed village when compared with the control village without spray.
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laboratory evaluation of Etofenprox treated fabrics against vector species of mosquitoes
International pest control, 2002Co-Authors: Neera Kapoor, M A AnsariAbstract:The bioefficacy of Etofenprox treated fabrics was evaluated against An. stephensi, Ae. aegypti and Cx. quinquefasciatus under laboratory conditions. Results revealed that Etofenprox has shown broad spectrum activity against mosquitoes. LD 50 and LD 90 values were 8.0 and 80.0 on cotton fabric for An. stephensi, 20.0 and 95.5 for Ae. aegypti and 35.0 and 98.5 mg/m 2 for Cx. quinquefasciatus. Statistical analysis revealed that there is no significant difference in the susceptibility of vector species of mosquitoes (P>0.05). However, on the basis of the relative toxicity index (RTI) and the persistence of insecticides, Etofenprox treated cotton fabric has produced most consistent results against tested species of mosquitoes.
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Relative efficacy of insecticide treated mosquito nets (Diptera: Culicidae) under field conditions.
Journal of Medical Entomology, 2000Co-Authors: M A Ansari, Raj K. RazdanAbstract:The relative efficacy of insecticide treated mosquito nets was evaluated under field conditions in Dehra village of Dhaulana PHC, District Ghaziabad, U.P., India, during 1996. Nylon nets were impregnated with deltamethrin, cyfluthrin, lambdacyhalothrin, and Etofenprox at 25 mg/m2 by standard methods. Repellent, excito-repellency, killing, and airborne actions were monitored from dusk to dawn by hourly collection of mosquitoes that entered and rested in rooms and also females that landed on treated and untreated mosquito nets. Results revealed 15.3–22.9% repellent action, 98.3–99.3% excito-repellency action, and 100% mortality of females that landed on treated fabrics. No significant differences were observed in the efficacy of different synthetic pyrethroids against anophelines. However, against Culex quinquefasciatus Say there was a significant difference between deltamethrin and Etofenprox. Control of anophelines was more pronounced than Cx. quinquefasciatus. There was no pronounced airborne action with any insecticide tested. Synthetic pyrethroids with strong airborne action may be more appropriate for impregnation of mosquito nets.
Borbala Szabo - One of the best experts on this subject based on the ideXlab platform.
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transgenerational and multigenerational stress gene responses to the insecticide Etofenprox in folsomia candida collembola
Ecotoxicology and Environmental Safety, 2019Co-Authors: Borbala Szabo, Gábor Bakonyi, Zsolt Lang, Janine Marien, Dick Roelofs, Cornelis A M Van Gestel, Aniko SeresAbstract:Abstract Insecticide exposure may cause both transgenerational and multigenerational effects on populations, but the molecular mechanisms of these changes remain largely unclear. Many studies have focused on either transgenerational or multigenerational mechanisms but did neglect the comparative aspects. This study assessed whether the pyrethroid insecticide Etofenprox (formulation Trebon ® 30 EC) shows transgenerational and/or multigenerational effects on the survival and reproduction of Folsomia candida (Collembola) . The activation of stress-related genes was studied to detect whether Etofenprox modifies the expression of reproduction-associated genes in trans- and multigenerational treatments. A laboratory study was carried out for three generations with five insecticide concentrations in LUFA 2.2 soil. In the transgenerational treatment, only the parent generation (P) was exposed, but the subsequent generations were not. In the multigenerational treatment, all three generations were exposed to the insecticide in the same manner. Multigenerational exposure resulted in reduced reproduction effects over generations, suggesting that F. candida is capable of acclimating to enhanced concentration levels of Etofenprox during prolonged exposure over multiple generations. In the transgenerational treatment, the heat shock protein 70 was up-regulated and cytochrome oxidase 6N4v1 expression down-regulated in a dose-dependent manner in the F2 generation. This finding raises the possibility of the epigenetic inheritance of insecticide impacts on parents. Furthermore, CYP6N4v1 expression was oppositely regulated in the trans- and multigenerational treatments. Our results draw attention to the differences in molecular level responses of F. candida to trans- and multigenerational Etofenprox exposure.
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Multigenerational and transgenerational side-effects of an insecticide on eggs of Folsomia candida (Collembola)
Polish Journal of Ecology, 2017Co-Authors: Borbala Szabo, Gábor BakonyiAbstract:ABSTRACT Environmental toxicants such as insecticides are able to provoke epigenetic alterations which can be inherited to future generations. The aim of the current study was to assess whether the insecticide Trebon 10F (containing the active ingredient Etofenprox) causes multigenerational and/or transgenerational effects on the egg traits of the collembolan Folsomia candida. The parent generation was kept in soil treated with three concentrations of the insecticide. The hatched offspring from each treatment were divided into two groups and were treated in the same manner as their parents (multigenerational effect), or remained untreated (transgenerational effect). The parents reacted with smaller eggs to the insecticide in a concentration dependent manner. Both multigenerational and transgenerational effects were detected in the offspring generations. While neither the number of eggs nor the ratios of the egg diameters (shortest/longest diameter) changed, the egg size increased as the Trebon 10F concent...
Ryan G De Leon - One of the best experts on this subject based on the ideXlab platform.
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Toxicity of the Insecticide Etofenprox to Three Life Stages of the Grass Shrimp, Palaemonetes pugio
Archives of Environmental Contamination and Toxicology, 2010Co-Authors: Marie E Delorenzo, Ryan G De LeonAbstract:Opportunities for environmental contamination by the insecticide Etofenprox are increasing as its uses expand from primarily indoor residential to rice cultivation and mosquito control. To provide toxicity data for sensitive saltwater species, effects of Etofenprox were assessed using three life stages of the estuarine grass shrimp, Palaemonetes pugio . Adults, larvae, and embryos were tested in aqueous exposures, while adults and larval shrimp were also tested in the presence of sediment. In addition, sublethal cellular stress biomarkers, glutathione and lipid peroxidation, were examined. Larval shrimp was the most sensitive life stage, with 96-h median lethal concentration (LC_50) of 0.89 μg/l, compared with 1.26 μg/l for adults and 100 μg/l for embryos. Presence of sediment significantly decreased toxicity of Etofenprox to both adult and larval shrimp. Etofenprox exposure (100 μg/l) increased time to hatch in embryos. Lipid peroxidation levels were reduced in adult and larval shrimp after 96 h exposure to Etofenprox, while no effect on glutathione was detected. The results of this study provide new information on the toxicity of Etofenprox to estuarine invertebrates. These data may prove beneficial to the regulation of this pesticide and management of its uses in coastal areas.
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toxicity of the insecticide Etofenprox to three life stages of the grass shrimp palaemonetes pugio
Archives of Environmental Contamination and Toxicology, 2010Co-Authors: Marie E Delorenzo, Ryan G De LeonAbstract:Opportunities for environmental contamination by the insecticide Etofenprox are increasing as its uses expand from primarily indoor residential to rice cultivation and mosquito control. To provide toxicity data for sensitive saltwater species, effects of Etofenprox were assessed using three life stages of the estuarine grass shrimp, Palaemonetes pugio. Adults, larvae, and embryos were tested in aqueous exposures, while adults and larval shrimp were also tested in the presence of sediment. In addition, sublethal cellular stress biomarkers, glutathione and lipid peroxidation, were examined. Larval shrimp was the most sensitive life stage, with 96-h median lethal concentration (LC50) of 0.89 μg/l, compared with 1.26 μg/l for adults and 100 μg/l for embryos. Presence of sediment significantly decreased toxicity of Etofenprox to both adult and larval shrimp. Etofenprox exposure (100 μg/l) increased time to hatch in embryos. Lipid peroxidation levels were reduced in adult and larval shrimp after 96 h exposure to Etofenprox, while no effect on glutathione was detected. The results of this study provide new information on the toxicity of Etofenprox to estuarine invertebrates. These data may prove beneficial to the regulation of this pesticide and management of its uses in coastal areas.