Larval Susceptiblity Of Aedes Aegypti And Culex Quinquefasciatus Populations To Chemical Insecticides [susceptibilidade Larval De Populações De Aedes Aegypti E Culex Quinquefasciatus A Inseticidas Químicos]

Objective. To evaluate the susceptibility to chemical insecticides of Culex quinquefasciatus and Aedes aegypt larvae from areas subjected to control treatments or not. Methods. Bioassays for diagnostic concentration and multiple concentration were performed for organophosphate and pyrethroid insecticides according to World Health Organization parameters. The susceptibility was assessed for mosquito larvae collected from an area not subjected to chemical control (Campinas, State of São Paulo, SP) and from other areas (Campo Grande, Mato Grosso do Sul, MS, and Cuiabá, Mato Grosso, MT), in Brazil, subjected to such treatments. Results. Tests for Culex quinquefasciatus larvae from Campinas, SP allowed suspicion of resistance to cypermethrin and gave evidence of resistance to cyfluthrin. Larvae of this species collected in Campo Grande, MS, and Campinas, SP, presented resistance to temephos. For the colony from the latter locality, the following resistance rates were established: RR50=6.36 and RR95=4.94, in relation to a standard susceptible strain. Moreover tests for Aedes aegypti showed similar susceptibility to temephos for a field population from Cuiabá, MT, and a laboratory population. Conclusions. The results indicate resistance of Culex quinquefasciatus to organophosphate and pyrethroid insecticides and make evident the need for evaluation and monitoring of the efficiency of insecticides to be used in mosquito control programs.374523527Bisset, J., Rodríguez, M., Soca, A., Cross-resistance to malathion in Cuba Culex quinquefasciatus induced by larval selection with deltamethrin (1998) Med. Vet. Entomol., 12, pp. 109-112Bracco, J.E., Dalbon, M., Marinotti, O., Barata, J.M.S., Resistência a inseticidas organofosforados e carbamatos em população de Culex quinquefasciatus (1997) Rev. Saúde Pública, 31, pp. 182-183Bracco, J.E., Barata, J.M.S., Marinotti, O., Evaluation of insecticide resistance in a population of Culex quinquefasciatus (Diptera: Culicidae) from São Paulo, Brazil (1999) Mem. Inst. Oswaldo Cruz, 94, pp. 115-120Brown, A.W.A., Insecticide resistance in mosquitoes: A pragmatic review (1986) J. Am. Mosq. Control Assoc., 2, pp. 123-140Campos, J., Andrade, C.F.S., Susceptibilidade larval de duas populações de Aedes aegypti a inseticidas químicos (2001) Rev. Saúde Pública, 35, pp. 232-236Campos, J., Andrade, C.F.S., Recco Pimentel, S.M., Malpighian tubule polytene chromosomes of Culex quinquefasciatus (Diptera, Culicinae) (2003) Mem. Inst. Oswaldo Cruz, 98, pp. 383-386Cutkomp, L.K., Subramanyam, B., Toxicity of pyrethroids to Aedes aegypti larvae in relation to temperature (1986) J. Am. Mosq. Control Assoc., 3, pp. 347-349Fernández, D.M., Rodríguez, M., Bisset, J., Perez, E., (1999) J. Am. Mosq. Control Assoc., 15, p. 421. , Identification of esterase resistance mechanisms in Aedes aegypti from Carabobo State, Venezuela in Summaries of Mosquito Vector Control and Biology in Latin America - A Ninth Symposium, St. Louis, MO, February 1999González, T., Bisset, J.A., Díaz, C., Rodríguez, M.M., Brandolini, M.B., Insecticide resistance in a Culex quinquefasciatus strain from Rio de Janeiro, Brazil (1999) Mem. Inst. Oswaldo Cruz, 94, pp. 121-122(1987), LeOra Software. Polo-PC, probit or logit analysis. Berkeley (CA)Reyes-Lugo, M., Neus, M., Insecticide resistance in Culex quinquefascitus Say 1823 (Diptera: Culicidae) from Zulia State, Venezuela (2000) Rev. Cient-Fac Cienc. Veter., 10, pp. 441-447Yébakima, A., Yp-Tcha, M.M., Reiter, P., Bisset, J., Delay, B., Chevillon, C., Pasteur, N., Detoxifying esterases in Culex pipiens quinquefasciatus from the caribbean countries (1995) J. Am. Mosq. Control Assoc., 11, pp. 363-366Vector resistance to pesticides (1992), World Health Organization. Geneva(WHO - Technical Report

Avaliação preliminar de óleos essenciais de plantas como repelentes para Aedes albopictus (Skuse, 1894) (Diptera: Culicidae)

Óleos essenciais de plantas têm sido formulados de forma caseira ou colocados no mercado de forma artesanal para repelir mosquitos hematófagos. O presente trabalho avaliou o possível efeito repelente de alguns excipientes normalmente usados em formulações comerciais e de óleos essenciais de nove plantas, sobre fêmeas de Aedes albopictus. Os testes foram realizados em caixas contendo mosquitos, oferecendo-se uma área definida de dedos da mão tratados ou não. Exceto pelo creme Lanatte e os géis de carbopol, as substâncias excipientes avaliadas mostraram ação repelente. Apenas os óleos provenientes de citronela (5 e 10%) resultaram em repelência expressiva, com índices médiosde proteção acimade 98%. Os resultados indicam que a metodologia empregada é adequada para a avaliação preliminar de produtos com potencial para a repelência de mosquitos

Evaluation Of Electronic Mosquito-repelling Devices Using Aedes Albopictus (skuse) (diptera: Culicidae) [avaliação De Aparelhos Eletrônicos Repelentes De Mosquitos Usandose Aedes Albopictus (skuse) (diptera: Culicidae)]

The mosquito-repelling devices Anti-Pic®, Mosquito Repeller® DX-600 and Bye-Bye Mosquito® were evaluated in boxes for experimentation by exposing human hands to Aedes albopictus (Skuse) adults. Two sets of tests were performed based on 15 min. expositions. In the first set both hands were introduced in the box, one of them holding the device on. In the second set only one hand was introduced each time, holdind the device on or off. The devices failed to show efficiency in both evaluations. A seemingly 30.3% repellency due to Anti-Pic® in the first set of experiments was not confirmed in the second set. It was discussed the value of such devices for dengue prevention.303497499Belton, P., An acoustic evaluation of electronic repellers (1981) Mosquito News, 41, pp. 751-755Belton, P., Attraction of male mosquitoes to sound (1994) J. Amer. Mosq. Control. Assoc, 10, pp. 297-301Combemale, P., Deruaz, D., Villanova, D., Guilaumont, P., Les insectifuges ou les répellents (1992) Ann. Dermatol. Venereol, 119, pp. 411-434Curtis, C.F., Fact and fiction in mosquito attraction and repulsion (1986) Parasitol. Today, 2, pp. 316-318Foster, W.A., Lutes, K.I., Tests of ultrasonic emissions on mosquito attraction to host is a flight chamber (1985) J. Amer. Mosq. Control. Assoc, 1, pp. 199-202Fradin, M.S., Mosquitoes and mosquito repellent: A clinician's guide (1998) An. Int. Med, 128, pp. 931-940Rutledge, L.C., Wirtz, R.A., Buescher, M.D., Mehr, Z.A., Mathematical models of the effectiveness and persistence of mosquito repellents (1985) J. Amer. Mosq. Control Assoc, 1, pp. 56-62Singleton, R.E., Evaluation of two mosquito-repelling devices (1977) Mosquito News, 37, pp. 195-199Wishart, G., Riordan, D.F., Flight responses to various sounds by adult males of Aedes aegypti (L.) (Diptera: Culicidae) (1959) Can. Entomol., 91, pp. 181-19