Chitin synthesis inhibitor effect on <i>Aedes aegypti</i> populations susceptible and resistant to organophosphate temephos

Martins, Ademir Jesús; Belinato, Thiago Affonso; Lima, José Bento Pereira; Valle, Denise

doi:10.1002/ps.1547

Cited by 38 publications

(51 citation statements)

References 16 publications

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“…There was no correlation among the tested populations between altered susceptibility to novaluron and resistance to temephos or deltamethrin, in contrast to the findings of Martins et al (2008). These authors observed that in Ae.…”

Section: Discussionmentioning

confidence: 67%

“…Novaluron emergence inhibition (EI) quantitative assays were adapted from Martins et al (2008). Briefly, L3 larvae were exposed to eight concentrations of novaluron in transparent plastic cups containing 150 mL of solution.…”

Section: Methodsmentioning

confidence: 99%

“…We found high novaluron slope values for all of the populations evaluated, a result that indicates homogeneity of the populations regarding this characteristic. The lowest slope, indicating higher heterogeneity, was found for the Henrique jorge population, which exhibited the highest novaluron resistance ratio (RR 90 of 1.71).There was no correlation among the tested populations between altered susceptibility to novaluron and resistance to temephos or deltamethrin, in contrast to the findings of Martins et al (2008). These authors observed that in Ae.…”

mentioning

confidence: 87%

“…Lethal concentrations (LCs) and resistance ratios (RRs) were calculated by probit analysis (Raymond 1985) and by comparison with Rockefeller LC values, respectively. According to criteria adopted in Brazil in 2006, a temephos RR above 3.0 represents the cut-off level for triggering resistance management strategies (Montella et al 2007).Novaluron emergence inhibition (EI) quantitative assays were adapted from Martins et al (2008). Briefly, L3 larvae were exposed to eight concentrations of novaluron in transparent plastic cups containing 150 mL of solution.…”

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confidence: 99%

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The efficacy of a chitin synthesis inhibitor against field populations of organophosphate-resistant Aedes aegypti in Brazil

Fontoura

Bellinato

Valle

et al. 2012

Mem. Inst. Oswaldo Cruz

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Key words: Aedes aegypti -chitin synthesis inhibitors -temephos -deltamethrin -novaluron -cross-resistance Among the arboviruses transmitted by mosquitoes throughout the world, dengue is presently the most relevant; it is endemic to all of the continents, except Europe (Nogueira et al. 2001, Forattini 2002, Claro et al. 2004. Brazil has an alarming dengue incidence with several outbreaks all over the country and an increasing incidence of severe cases. Therefore, major public health campaigns target this disease (Teixeira et al. 1999, Câ-mara et al. 2007, MS/SVS 2009.Specific drugs and an effective vaccine against dengue virus are not yet available (Durbin & Whitehead 2010). Consequently, the only way to control the dengue epidemiological network is to target the virus' vector, Aedes aegypti (Medronho 2006. Although the elimination of potential Aedes breeding sites is increasingly considered a crucial component of dengue control, the utilisation of chemical insecticides is still a common measure. Until very recently, the most commonly used insecticides against Aedes in Brazil were the organophosphate temephos and the pyrethroid deltamethrin, which are used to control the larval and adult populations, respectively .The continuous use of chemical insecticides can lead to the dissemination of resistance and the consequent failure of the control efforts. Therefore, alternative methods of controlling disease-transmitting vectors are urgently needed. Two examples are entomopathogenic bacteria and insect growth regulators (IGRs). The biological insecticide Bacillus thuringiensis serovar israelensis (Bti) has been employed against Ae. aegypti in various municipalities of Brazil. However, the reduced field persistence of commercially available Bti formulations is an obstacle; under tropical conditions, the maximal residual effect observed lasted four weeks .In contrast to the classical chemical insecticides and biolarvicides, IGRs are not directly toxic, but act selectively on the development, metamorphosis or reproduction of the target insect species (Hoffmann & Lorenz 1998, Martins & Silva 2004. Among IGRs, the chitin synthesis inhibitors (CSIs) act by interfering with the synthesis or deposition of chitin on the exoskeleton or other chitinised internal structures, such as the peritrophic matrix (Merzendorf & Zimoch 2003, Merzendorf 2005.Novaluron is a CSI that is already utilised in agriculture. It is highly effective against Coleoptera, Homoptera and Lepidoptera larvae of several crop pests . It can act through ingestion, as verified in the larvae of the moth species Spodoptera littoralis and Helicoverpa armigera, or through contact, as reported with the flies Bemisia tabaci and Trialeurodes vaporariorum (Ishaaya et al. 1996(Ishaaya et al. , 1998. Novaluron is also efficient against Ae. aegypti larvae, as reported by Mulla et al. (2003) and Arredondo-jiménez and Valdez-Delgado (2006). Because novaluron is recommended by the World Health Organization for use in drinking water, it represents a potential tool in the con...

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Section: Discussionmentioning

confidence: 67%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 87%

mentioning

confidence: 99%

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The efficacy of a chitin synthesis inhibitor against field populations of organophosphate-resistant Aedes aegypti in Brazil

Fontoura

Bellinato

Valle

et al. 2012

Mem. Inst. Oswaldo Cruz

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“…10 The organophosphate temephos was widely used as larvicide for the control of dengue vectors in Martinique. Strong levels of resistance to organophosphates have also been detected in Southeast Asia, 11 South America, 12 and the Caribbean. 9 In Martinique, temephos was replaced in 2009 by Bacillus thuringiensis var israeliensis ( Bti ) after European Biocide legislation (European Directive 98/8EC, February 1998).…”

Section: Introductionmentioning

confidence: 99%

Field Efficacy of New Larvicide Products for Control of Multi-Resistant Aedes aegypti Populations in Martinique (French West Indies)

Marcombe¹,

Darriet²,

Agnew³

et al. 2011

The American Journal of Tropical Medicine and Hygiene

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Abstract. World-wide dengue vector control is hampered by the spread of insecticide resistance in Aedes aegypti . We report the resistance status of a wild Ae. aegypti population from Martinique (Vauclin) to conventional larvicides ( Bacillus thuringiensis var israeliensis [ Bti ] and temephos) and potential alternatives (spinosad, diflubenzuron, and pyriproxyfen). The efficacy and residual activity of these insecticides were evaluated under simulated and field conditions. The Vauclin strain exhibited a high level of resistance to temephos, a tolerance to insect growth regulators, and full susceptibility to spinosad and Bti . In simulated trials, pyriproxyfen and Bti showed long residual activities in permanent breeding containers (28 and 37 weeks), whereas under field conditions they failed to curtail Ae. aegypti populations after four weeks. Conversely, diflubenzuron and spinosad showed a residual efficacy of 16 weeks, suggesting that these chemicals may be promising alternatives to Bti and temephos for controlling insecticide-resistant Ae. aegypti populations.

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Biopolymers from Animals

Shaik

Moussian

2013

Handbook of Biopolymer‐Based Materials

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Chitin synthesis inhibitor effect on Aedes aegypti populations susceptible and resistant to organophosphate temephos

Cited by 38 publications

References 16 publications

The efficacy of a chitin synthesis inhibitor against field populations of organophosphate-resistant Aedes aegypti in Brazil

The efficacy of a chitin synthesis inhibitor against field populations of organophosphate-resistant Aedes aegypti in Brazil

Field Efficacy of New Larvicide Products for Control of Multi-Resistant Aedes aegypti Populations in Martinique (French West Indies)

Biopolymers from Animals

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