Biological activity of Bacillus thuringiensis strains against larvae of the Blowfly Chrysomya putoria (Wiedemann) (Diptera: Calliphoridae)

• Autor(a) principal: Oliveira,Marcio S.
• Data de Publicação: 2006
• Outros Autores: Nascimento,Marcelo A., Cavados,Clara F.G., Chaves,Jeane Q., Rabinovitch,Leon, Lima,Marli M., Queiroz,Margareth M.C.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Neotropical entomology (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000600020
• topic: Fly; entomopathogenic action; biological control

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, sliglity 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.