Larvicidal activity of Bacillus sphaericus 2362 against Anopheles nuneztovari, anopheles darlingi and Anopheles braziliensis (diptera, culicidae)

• Autor(a) principal: Rodrigues, Iléa Brandão
• Data de Publicação: 1999
• Outros Autores: Tadei, Wanderli Pedro, Silva Dias, José Manuel Cabral da
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional do INPA
• Texto Completo: https://repositorio.inpa.gov.br/handle/1/16437
• topic: Bacterial Toxin; Binb Protein, Bacillus Sphaericus; Insecticide; Animals; Anopheles; Bioassay; Comparative Study; Disease Carrier; Female; Insect Control; Methodology; Time; Animal; Anopheles; Bacterial Toxins; Biological Assay; Female; Insect Control; Insect Vectors; Insecticides; Time Factors

In this present study, preliminary data was obtained regarding the mortality rate of the Amazonian anophelines, Anopheles nuneztovari, Anopheles darlingi and Anopheles braziliensis when subjected to treatment with Bacillus sphaericus strain 2362, the WHO standard strain. Initially, experiments were conducted to test the mortality rate of the three species of anopheline larvae. The third larval instar of An. nuneztovari and the second and third larval instars of An. darlingi proved to be the least susceptible. In other experiments, the same three mosquito species were tested with the standard strain 2362, An. nuneztovari was the least susceptible to this insect pathogen, while An. braziliensis was the most susceptible. This latter species showed a difference in the level of LC50 concentration, when compared to the former, of 2.4, 2.5 and 1.8 in readings taken 24, 48 and 72 hours after exposure to the bacillus.