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Screening of Bacillus thuringiensis strains effective against mosquitoes

Screening of Bacillus thuringiensis strains effective against mosquitoes

Pesquisa Agropecuaria Brasileira 40(2): 103-106

ISSN/ISBN: 0100-204X

The objective of this work was to evaluate 210 Bacillus thuringiensis strains against Aedes aegypti and Culex quinquefasciatus larvae to select the most effective. These strains were isolated from different regions of Brazil and are stored in a Bacillus spp. collection at Embrapa Recursos Geneticos e Biotecnologia, Brasilia, Brazil. The selected strains were characterized by morphological (microscopy), biochemical (SDS-PAGE 10%) and molecular (PCR) methods. Six B. thuringiensis strains were identified as mosquito-toxic after the selective bioassays. None of the strains produced the expected PCR products for detection of cry4, cryl1 and cyt1A genes. These results indicate that the activity of mosquitocidal Brazilian strains are not related with Cry4, Cry11 or Cyt proteins, so they could be used as an alternative bioinsecticide against mosquitoes.

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Accession: 070578574

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