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Mem Inst Oswaldo Cruz. 2004 Mar;99(2):211-8. Epub 2004 Jun 24.

Activity of oil-formulated Beauveria bassiana against Triatoma sordida in peridomestic areas in Central Brazil.

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  • 1Instituto de Patologia Tropical e Saúde Pública, Caixa Postal 131, 74001-970 Goiânia, GO, Brasil.


Field tests were carried out during the rainy season of 2001/2002 in São Luís de Montes Belos, Goiás, Brazil, to evaluate the potential of the entomopathogenic fungus, Beauveria bassiana, against peridomestic Triatoma sordida. An oil-water formulation of the isolate CG 14 (Embrapa) was applied in triatomine infested hen houses of four farms at a final concentration of 10(6) conidia/cm2. Numbers of T. sordida decreased over the next 25 days, after application of the fungus, and B. bassiana developed on dead insects in one hen house. A high number of B. bassiana colonies was detected in substrates collected in treated hen houses 24 h after application of CG 14. In the following three months the presence of B. bassiana declined to values found before treatment.

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