title: Biological activity of Bacillus thuringiensis strains against larvae of the blowfly Chrysomya putoria (Wiedemann) (Diptera: Calliphoridae).
abstract: Different strains of Bacillus thuringiensis Berliner were proved to be a powerful biologic insecticide against larvae of several insect orders. Due to the epidemiological importance of blowflies of the Chrysomya Robineau-Desvoidy genus in the production of secondary cutaneous myiasis and mechanic transmission of pathogenic agents, the performance of two strains of B. thuringiensis (LFB-FIOCRUZ 907 and LFB-FIOCRUZ 856) was tested against larvae of Chrysomya putoria (Wiedemann). The LFB-FIOCRUZ 907 strain was tested in four different concentrations, added to the diet; the LFB-FIOCRUZ 856 strain was tested in three concentrations. C. putoria larvae showed sensibility to the treatment with the LFB-FIOCRUZ 907 strain at the tested concentrations. The higher concentration presented the best efficiency, causing higher mortality and reducing larval weight and adult emergence more intensely. The LFB-FIOCRUZ 856 strain showed low toxicity, slightly reducing emergence time of adults at 326 mg/25 g concentration and larval weight at 326 mg/25 g and 86 mg/25 g concentrations.
authors.affiliation: Coordenação de Vigilância Ambiental em Saúde, SES-RJ, Rio de Janeiro, RJ, 200315-142. msoliveira@sauderj.gov.br
authors.forename: Marcio S
authors.initials: MS
authors.lastname: Oliveira
authors.forename: Marcelo A
authors.initials: MA
authors.lastname: Nascimento
authors.forename: Clara F G
authors.initials: CF
authors.lastname: Cavados
authors.forename: Jeane Q
authors.initials: JQ
authors.lastname: Chaves
authors.forename: Leon
authors.initials: L
authors.lastname: Rabinovitch
authors.forename: Marli M
authors.initials: MM
authors.lastname: Lima
authors.forename: Margareth M C
authors.initials: MM
authors.lastname: Queiroz
mesh_terms: D000818:Animals; D001413:Bacillus thuringiensis / Q000502:physiology*; D004175:Diptera / Q000382:microbiology*; D010572:Pest Control, Biological