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EFIKASI KOMBINASI Bacillus thuringiensis israelensis DAN Mesocyclops aspericornis SEBAGAI PENGENDALI HAYATI Aedes aegypti DI GENTONG AIR  [cached]
R. A. Yuniarti,Damar T. B.
Bulletin of Health Research , 2012,
Abstract: EFIKASI KOMBINASI Bacillus thuringiensis israelensis DAN Mesocyclops aspericornis SEBAGAI PENGENDALI HAYATI Aedes aegypti DI GENTONG AIR
Potencial de Bacillus thuringiensis israelensis Berliner no controle de Aedes aegypti
Polanczyk,Ricardo Antonio; Garcia,Marcelo de Oliveira; Alves,Sérgio Batista;
Revista de Saúde Pública , 2003, DOI: 10.1590/S0034-89102003000600020
Abstract: the importance of the entomopathogenic bacterium bacillus thuringiensis israelensis in the control of aedes aegypti is presented. the use and potential of b. thuringiensis israelensis against the mosquito vector of dengue fever is described. other aspects such as insect's resistance development against chemicals and advantages and constraints of using microbial control are discussed. emphasis is given to the importance of the use of this bacterium in brazil, which could contribute significantly to solving the mosquito problem without affecting the environment, humans and others invertebrate organisms in critical regions.
Potencial de Bacillus thuringiensis israelensis Berliner no controle de Aedes aegypti  [cached]
Polanczyk Ricardo Antonio,Garcia Marcelo de Oliveira,Alves Sérgio Batista
Revista de Saúde Pública , 2003,
Abstract: Relata-se a importancia da bactéria entomopatogênica Bacillus thuringiensis israelensis para o controle de Aedes aegypti. S o abordados a utiliza o e potencial de B. thuringiensis israelensis contra o mosquito vetor da dengue. Outros aspectos s o discutidos como a evolu o da resistência dos insetos em rela o aos inseticidas químicos e as vantagens e desvantagens do controle microbiano como estratégia de controle. é dada ênfase à importancia da utiliza o desta bactéria no Brasil como alternativa para resolver o problema em quest o sem afetar o ambiente, o homem e outros vertebrados nas áreas de risco.
Susceptibilidad de cepas de Aedes aegypti (L.) a Bacillus thuringiensis var. israelensis en La Habana Susceptibility of Aedes aegypti (L.) strains from Havana to a Bacillus thuringiensis var. israelensis  [cached]
Zulema Menéndez Díaz,Jinnay Rodríguez Rodríguez,René Gato Armas,Ariamys Companioni Iba?ez
Revista Cubana de Medicina Tropical , 2012,
Abstract: Introducción: entre las estrategias promovidas para el control vectorial se encuentra la integración de los métodos químicos y biológicos, debido a los problemas ambientales e inquietudes en la comunidad provocadas por la acción de los insecticidas orgánicos sintéticos. La bacteria Bacillus thuringiensis var. israelensis en formulación líquida ha sido utilizada ampliamente en programas de control en diversos países y en Cuba ha mostrado alta eficacia a nivel de laboratorio contra Aedes aegypti. Objetivo: determinar la susceptibilidad al Bacillus thuringiensis var. israelensis de Aedes aegypti colectados en los municipios de La Habana, Cuba. Métodos: se emplearon 15 cepas de Aedes aegypti, una de cada municipio de La Habana, a partir de larvas y pupas colectadas en 2010 y una cepa de referencia: Rockefeller. Se utilizó Bacillus thuringiensis var. israelensis, en formulación de tipo suspensión acuosa (Bactivec, Labiofam, Cuba). Para la realización de los bioensayos se siguieron las guías de la Organización Mundial de la Salud para larvicidas bacterianos de uso en salud pública. La mortalidad larvaria se leyó a las 24 h y los resultados se procesaron en el sistema informático estadístico SPSS (11.0) mediante análisis Probit. Resultados: las cepas de mosquitos evaluadas mostraron elevada susceptibilidad al biolarvicida, no se registraron diferencias significativas entre los valores de CL50 de las cepas de Aedes aegypti, ni de éstas comparadas con la cepa de referencia. Conclusiones: los resultados presentados sugieren que la aplicación de Bacillus thuringiensis var. israelensis sigue siendo una alternativa para el control de poblaciones larvales de Aedes aegypti en la provincia de La Habana. Introduction: the integration of chemical and biological methods is one of the strategies for the vector control, due to the existing environmental problems and the concerns of the community as a result of the synthetic organic insecticide actions. The bacterium called Bacillus thuringiensis var. israelensis in liquid formulation has been widely used in the vector control programs in several countries and has shown high efficacy at lab in Cuba. Objective: to determine the susceptibility of Aedes aegypti collected in the municipalities of La Habana province to Bacillus thuringiensis var. israelensis. Methods: fifteen Aedes aegypti strains, one from each municipality, were used including larvae and pupas collected in 2010 and one reference strain known as Rockefeller. The aqueous formulation of Bacillus thuringiensis var. israelensis (Bactivec, Labiofam, Cuba) was used. T
Estudio de resistencia de Aedes aegypti a Bacillus thuringiensis var: israelensis
Gato Armas,René; Díaz Pérez,Manuel; Bruzón águila,Rosa; Menéndez Díaz,Zulema; González Rizo,Aileen; Hernández González,Yenín; García ávila,Israel;
Revista Cubana de Medicina Tropical , 2008,
Abstract: introduction: prolonged use of insecticides has led to resistance development in different mosquito species including aedes aegypti, although there is no report of resistance to bacillus thuringiensis var. israelensis so far. objectives: to evaluate resistance to bacillus thuringiensis var. israelensis in aedes aegypti populations from places where fluid preparation bactivec (made in labiofam company) has been applied, and in lab strains under selection. methods: larvae were collected in three municipalities of the city of havana province to settle aedes aegypti colonies in the laboratory, which were compared with reference strain called rockefeller in terms of susceptibility to bacillus thuringiensis. the selection experiment was performed by exposing successive generations of a strain susceptible to lethal dose 90 of this biolarvicide. results: resistance index 50 for strains from plaza, cerro and boyeros was 1.07, 0.66 and 0.81 respectively, so they may be considered as susceptible strains. the strain exposed to intensive selection pressure with the biolarvicide showed resistance indexes 50 and 95 equal to 2.7 and 4.6 respectively. the smallest regression line slope was found in the selection strain, which indicated a greater genetic variability in this population. conclusions: these results support the use of bacillus thuringiensis var. israelensis as an alternative for management of immature aedes aegyptis without any evidence whatsoever of emerging resistance in the field population, but some adequate management strategies should be drawn, taking into account the vector′s potentialities to acquire it.
Evaluation of a new tablet formulation based on Bacillus thuringiensis sorovar. israelensis for larvicidal control of Aedes aegypti
Melo-Santos, Maria Alice Varjal de;Sanches, Elizabeth Gomes;Jesus, Fernando Justino de;Regis, Lêda;
Memórias do Instituto Oswaldo Cruz , 2001, DOI: 10.1590/S0074-02762001000600020
Abstract: the effect of sunlight on the efficacy and persistence of an experimental tablet formulation based on bacillus thuringiensis sorovar. israelensis (c4p1) was evaluated against aedes aegypti larvae under simulated field conditions. the initial mortality ranged from 93 to 100%, and the residual activity (3 70% mortality) recorded in containers exposed to sunlight or shade were, respectively, 13-35 days and 40-54 days. the results suggest that c4p1 can provide long-term larvicidal effect and operational advantages.
Susceptibility of Aedes aegypti larvae to temephos and Bacillus thuringiensis var israelensis in integrated control
Andrande,Carlos Fernando S. de; Modolo,Maurício;
Revista de Saúde Pública , 1991, DOI: 10.1590/S0034-89101991000300004
Abstract: the susceptibility of field collected aedes aegypti larvae was evaluated in terms of median lethal time (lt50) and final mortality, when treated with temephos, bacillus thuringiensis var israelensis as well as mixtures of these two agents. third instar larvae were shown to be more susceptible than early and late fourth instar ones to the entomopathogen. survival of some individuals when exposed to temephos suggest possible resistance. temporal synergism in early fourth instar larvae was detected when they were exposed to mixtures of bti-temephos. the possibility of this integrated treatment is commented on.
Evaluation of a new tablet formulation based on Bacillus thuringiensis sorovar. israelensis for larvicidal control of Aedes aegypti  [cached]
Melo-Santos Maria Alice Varjal de,Sanches Elizabeth Gomes,Jesus Fernando Justino de,Regis Lêda
Memórias do Instituto Oswaldo Cruz , 2001,
Abstract: The effect of sunlight on the efficacy and persistence of an experimental tablet formulation based on Bacillus thuringiensis sorovar. israelensis (C4P1) was evaluated against Aedes aegypti larvae under simulated field conditions. The initial mortality ranged from 93 to 100%, and the residual activity ( > or = 70% mortality) recorded in containers exposed to sunlight or shade were, respectively, 13-35 days and 40-54 days. The results suggest that C4P1 can provide long-term larvicidal effect and operational advantages.
Dynamics of the control of Aedes (Stegomyia) aegypti Linnaeus (Diptera, Culicidae) by Bacillus thuringiensis var israelensis, related with temperature, density and concentration of insecticide
Duque L, Jonny E.;Navarro-Silva, Mario Ant?nio;
Revista Brasileira de Entomologia , 2006, DOI: 10.1590/S0085-56262006000400014
Abstract: the dynamics of the control of aedes (stegomyia) aegypti linnaeus, (diptera, culicidae) by bacillus thuringiensis var israelensis has been related with the temperature, density and concentration of the insecticide. a mathematical model for biological control of aedes aegypti with bacillus thuringiensis var israelensis (bti) was constructed by using data from the literature regarding the biology of the vector. the life cycle was described by differential equations. lethal concentrations (lc50 and lc95) of bti were determined in the laboratory under different experimental conditions. temperature, colony, larvae density and bioinsecticide concentration presented marked differences in the analysis of the whole set of variables; although when analyzed individually, only the temperature and concentration showed changes. the simulations indicated an inverse relationship between temperature and mosquito population, nonetheless, faster growth of populations is reached at higher temperatures. as conclusion, the model suggests the use of integrated control strategies for immature and adult mosquitoes in order to achieve a reduction of aedes aegypti.
Aplicación de formulaciones de Bacillus thuringiensis var. israelensis SH-14 contra Aedes (S) aegypti
Gomes de Assump??o Filho,Uranis; da Costa Silva,Wellington;
Revista Cubana de Medicina Tropical , 2004,
Abstract: the effficacy of 3 formulations of bacillus thuringiensis var. israelensis sh-14: bactivec; g and wdg was evaluated in 4 districts of the municipality of nova iguacu, rio de janeiro, brazil, that had high levels of aedes (s) aegypti (diptera: culicidae) infectation and represented a high risk for dengue transmission. after the inital use of these 3 biolarvicides, weekly postreatment surveys were done to evaluate its permanence. the location of ovitraps in each district allowed to detect the slowest index of positivity in the district where bactivec was used (x2 = 29.40; p= 0.000). this biolarvicide made possible the highest reduction of the house index (95.4 %) with a permanence of 62 days (x2 = 35.34, p= 0.000). the participation of the community of botafogo district, where these results and the slowest percentage of closed houses (z= 13.11; p= 0.000) were obtained, was significant.
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