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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 93, No. 4, 1998, pp. 441-444
Bioline Code: oc98087
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 93, No. 4, 1998, pp. 441-444

 en Studies on the Bacillus sphaericus larvicidal activity against malarial vector species in Amazonia
Ilea Brandao Rodrigues; Waderli Pedro Tadei & Jose Manoel C Silva Dias

Abstract

In this work, bioassays were carried out in laboratory conditions (average
temperature 26+/-2 C) to test ten strains of Bacillus sphaericus,
isolated from Brazilian soils against third instar larvae from anopheline
species recorded as malaria vectors in Amazonian - Anopheles
nuneztovari and An. darlingi. With the former mosquito, three
strains - S2, S20 and S46 showed relative activity, in 24 and 48 hr
exposure to the B. spahericus strains. With the latter only the S2
and S20 were effective in the 48 hr reading. The studied strains that
showed the most adequate response in the Amazonian region were S2 and S20
showing broader and more efficient results. Therefore, S2 was the most
effective when the 24 and 48 hr readings were considered, because it showed
the greatest relative activity values.

Keywords
malaria - biological control - anopheline - Bacillus sphaericus

 
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