Impact of water renewal on the residual effect of larvicides in the control of Aedes aegypti

Pontes, Ricardo José Soares; Filho, Fábio Fernandes Dantas; Alencar, Carlos Henrique; Regazzi, Ana Cláudia Ferreira; Cavalcanti, Luciano Pamplona de Góes; Ramos, Alberto Novaes; Lima, José Wellington de Oliveira

doi:10.1590/s0074-02762010000200019

Cited by 14 publications

(12 citation statements)

References 5 publications

(5 reference statements)

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“…Finally, formulation A showed 100% mortality for about 20 days but with more rapid loss of residual effect of all the other products studied, only 15% mortality at 90 days. Also, Pontes et al (2010) evaluate the residual effect of three larvicides under laboratory conditions for 100 days in A. aegypti. In the B. thuringiensis israelensis (Bti)-WDG test, mortality was sustained above 90% for up to 35 days.…”

Section: Residual Effectmentioning

confidence: 99%

Evaluation of time toxicity, residual effect, and growth-inhibiting property of Carapa guianensis and Copaifera sp. in Aedes aegypti

et al. 2011

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Oils of Carapa guianensis and Copaifera spp. are well-known in the Amazonian region as natural insect repellents, and studies have reported their efficiency as larvicide against some mosquito species. However, toxicity persistence and effect on mosquito development have not yet been evaluated. Thus, the objective of this study was to evaluate the initial time of larvicidal activity, residual effect, and the effect of very low concentrations of these oils on Aedes aegypti. Different concentrations of the oils were used to evaluate the initial time of larval mortality and residual effect, as well as, the development of larvae, pupae, and adults. Results demonstrated that the lethal effect started mainly between the first 2 and 3 h of larvae exposure to oils, when using concentrations which ranged from 500 mg/L of C. guianensis and 90 mg/L of Copaifera sp. The toxic effect remained with total efficiency (100% mortality) until the sixth day for Copaifera sp. and 12th day for C. guianensis. When using sublethal dosages (ranging from 140 mg/L of C. guianensis to 26 mg/L of Copaifera sp.) mortality was observed after the larval molt. Also, imperfection of pupae and adult development and unsuccessful emergence of adults were observed. A product of botanical origin that could break the development of immature stage of mosquitoes and inhibit the emergence of adults should be essential in vector control. Thus, our results provide new information for a better understanding in using C. guianensis and Copaifera sp. oils with a potential to be used as a natural insecticide.

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Section: Residual Effectmentioning

confidence: 99%

Evaluation of time toxicity, residual effect, and growth-inhibiting property of Carapa guianensis and Copaifera sp. in Aedes aegypti

et al. 2011

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“…Previous studies have indicated that water renewal can have a negative infl uence on the larvicide residual activity used in vector control programs (44) .…”

Section: Discussionmentioning

confidence: 99%

A biodegradable device for the controlled release of Piper nigrum (Piperaceae) standardized extract to control Aedes aegypti (Diptera, Culicidae) larvae

Custódio

Oliveira

Moterle

et al. 2016

Rev. Soc. Bras. Med. Trop.

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Introduction:The signifi cant increase in dengue, Zika, and chikungunya and the resistance of the Aedes aegypti mosquito to major insecticides emphasize the importance of studying alternatives to control this vector. The aim of this study was to develop a controlled-release device containing Piper nigrum extract and to study its larvicidal activity against Aedes aegypti. Methods: Piper nigrum extract was produced by maceration, standardized in piperine, and incorporated into cotton threads, which were inserted into hydrogel cylinders manufactured by the extrusion of carrageenan and carob. The piperine content of the extract and thread reservoirs was quantifi ed by chromatography. The release profi le from the device was assessed in aqueous medium and the larvicidal and residual activities of the standardized extract as well as of the controlled-release device were examined in Aedes aegypti larvae. Results: The standardized extract contained 580mg/g of piperine and an LC 50 value of 5.35ppm (24h) and the 3 cm thread reservoirs contained 13.83 ± 1.81mg of piperine. The device showed zero-order release of piperine for 16 days. The P. nigrum extract (25ppm) showed maximum residual larvicidal activity for 10 days, decreasing progressively thereafter. The device had a residual larvicidal activity for up to 37 days. Conclusions: The device provided controlled release of Piper nigrum extract with residual activity for 37 days. The device is easy to manufacture and may represent an effective alternative for the control of Aedes aegypti larvae in small water containers.

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“…The last few decades experienced the use of insecticides of biological origin against the larvae of Aedes aegypti (Cheng et al 2003;Harvae and Kamath 2004;Koodalingam et al 2009;Kumar et al 2010;Oliveira et al 2010). In recent times, there has been major concern for the promotion of plant-based insecticides including microbial (Melo-Santos et al 2001;Wang and Jaal 2005;Pontes et al 2010) and insect growth regulators (Sihunincha et al 2005;Vythilingam et al 2005). However, recent reports have shown that the use of microbes like Bacillus sphaericus as a potent biolarvicide in India is limited due to the development of resistance towards these compounds in the laboratory and in the field conditions (Poopathi and Tyagi 2002;Singh and Prakash 2009).…”

Section: Discussionmentioning

confidence: 99%

Biochemical evidence of efficacy of potash alum for the control of dengue vector Aedes aegypti (Linnaeus)

Preet

Sneha

2010

Parasitol Res

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Aedes aegypti is the primary vector of dengue, yellow fever and chikungunya in India and other South East Asian countries, and novel insecticides for vector control are urgently needed. In the present investigation, efficacy of potash alum, a traditionally known double salt in Indian and Chinese medicine system, was tested against the larvae of dengue vector, A. aegypti. LC(50,) LC(90) and LC(99) values were recorded for various instar larvae where I instar larvae were found to be the most susceptible and IV instar larvae as the least susceptible one. The LC(50) values of crude and standard potash alum of various instar larvae ranged between 15.29 and 48.53 ppm and 20.50-65.10 ppm, respectively. Biochemical changes were also evidenced in IV instar A. aegypti larvae following a sublethal exposure for 24 h in the levels of various nutrient reserves and primary metabolites such as sugar, glycogen, lipids and proteins suggesting possible mode of action responsible for larval mortality. Sugar and glycogen concentrations were measured as 24.6 and 10.67 μg per five larvae in controls which were significantly (p<0.05) reduced by 32.11-93.98% and 39.26-94.47%, respectively, in larvae treated with crude alum. In controls, protein and lipid content were recorded as 210.74 and 94.71 μg per five larvae which dropped up to 26.53% and 25.5%, respectively, in larvae following treatment with crude alum. Moreover, drastic changes were also recorded for DNA content with 25.39-44.17% decrease in crude alum-treated larvae. It is evident from these results that potash alum, a fairly cheaper and readily available ecofriendly compound could be recommended as a potential chemical larvicide against dengue vector at mosquito breeding sites in the vicinity of human dwellings.

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Impact of water renewal on the residual effect of larvicides in the control of Aedes aegypti

Cited by 14 publications

References 5 publications

Evaluation of time toxicity, residual effect, and growth-inhibiting property of Carapa guianensis and Copaifera sp. in Aedes aegypti

Evaluation of time toxicity, residual effect, and growth-inhibiting property of Carapa guianensis and Copaifera sp. in Aedes aegypti

A biodegradable device for the controlled release of Piper nigrum (Piperaceae) standardized extract to control Aedes aegypti (Diptera, Culicidae) larvae

Biochemical evidence of efficacy of potash alum for the control of dengue vector Aedes aegypti (Linnaeus)

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