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

Memorias do Instituto Oswaldo Cruz

PubMedID: 15250478

Luz C, Rocha LF, Nery GV, Magalhães BP, Tigano MS. Activity of oil-formulated Beauveria bassiana against Triatoma sordida in peridomestic areas in Central Brazil. Mem Inst Oswaldo Cruz. 2004;99(2):211-8.
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.