Biological activity of Bacillus thuringiensis strains against larvae of the blowfly Chrysomya putoria (Wiedemann) (Diptera: Calliphoridae).
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.
Oliveira
Marcio S
MS
Coordenação de Vigilância Ambiental em Saúde, SES-RJ, Rio de Janeiro, RJ, 200315-142. msoliveira@sauderj.gov.br
Nascimento
Marcelo A
MA
Cavados
Clara F G
CF
Chaves
Jeane Q
JQ
Rabinovitch
Leon
L
Lima
Marli M
MM
Queiroz
Margareth M C
MM
D000818:Animals; D001413:Bacillus thuringiensis / Q000502:physiology*; D004175:Diptera / Q000382:microbiology*; D010572:Pest Control, Biological