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RESIDUAL EFFECT OF TWO BACILLUS THURINGIENSIS VAR. ISRAELENSIS PRODUCTS ASSAYED AGAINST AEDES AEGYPTI (DIPTERA: CULICIDAE) IN LABORATORY AND OUTDOORS AT RIO DE JANEIRO, BRAZIL
Bacillus thuringiensis var. israelensis
Inseticida
Controle biológico
Bacillus thuringiensis var. israelensis
Insecticide
Biological control
Afiliación
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Entomologia. Laboratório de Fisiologia e Controle de Artrópodes Vetores. Rio de Janeiro, RJ. Brasil.
Ministério da Saúde. Secretaria Executiva Nacional do Programa de Erradicação de Aedes aegypti. Brasília, DF, Brasil / Faculdade de Medicina de Marília. Marília, SP, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Entomologia. Laboratório de Fisiologia e Controle de Artrópodes Vetores. Rio de Janeiro, RJ. Brasil.
Ministério da Saúde. Secretaria Executiva Nacional do Programa de Erradicação de Aedes aegypti. Brasília, DF, Brasil / Faculdade de Medicina de Marília. Marília, SP, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Entomologia. Laboratório de Fisiologia e Controle de Artrópodes Vetores. Rio de Janeiro, RJ. Brasil.
Resumen en ingles
Resistance of the dengue vector to temephos stimulated its substitution for Bacillus thuringiensis var. israelensis (Bti) since
2001 in Brazil. The persistence of the two Bti formulations employed at that time by the Health Ministry, Vectobac G and Aquabac
G, was assayed under laboratory and outdoor conditions. Both formulations were tested at 0.2 g/10 liters of water, the same
concentration applied in the field for vector control. The tests were done against Ae. aegypti third instar larvae (Rockefeller strain).
In the laboratory, Vectobac G and Aquabac G caused at least 95% mortality until 101 and 45 days after treatment, respectively. In
the outdoor assays, test containers of different materials were treated with either formulation and placed in a shaded area. Larvae
were introduced each 3-6 days and mortality was recorded 24 and 48 hours later. In the first set of assays, performed in June 2001,
mortality levels of 70% or more were attained for 2-5 weeks for both formulations in all containers. The exception was for the iron
one that rusted, resulting in low mortality after seven days. In the second set of assays (August 2001), 70% mortality was attained
for just 1-2 weeks for all the containers and both formulations.
Palabras clave en portugues
Aedes aegyptiBacillus thuringiensis var. israelensis
Inseticida
Controle biológico
Palabras clave en ingles
Aedes aegyptiBacillus thuringiensis var. israelensis
Insecticide
Biological control
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