Detection of entomopathogenic fungi in peridomestic triatomine-infested areas in central Brazil and fungal activity against Triatoma infestans (Klug) (Hemiptera: Reduviidae)
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Data
2004-12
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Resumo
From 148 substrate samples collected in peridomestic triatomine-infested habitats of 24
farms in Central Brazil, 31 isolates of Metarhizium anisopliae (Metsch.) Sorok. and 15 isolates of
Beauveria bassiana (Bals.) Vuill. were obtained. Most of the isolates were found in substrates that
consisted of soil mixed with animal feces or soil only in areas of trees where poultry roost and pig
houses. Fungi were detected with an insect bait method using Triatoma infestans (Klug), and combined
in vitro and in vivo techniques with modified Chase medium and T. infestans. All isolates were highly
virulent to T. infestans third instar nymphs at a relative humidity > 98% and temperature of 25 ± 0.5°C.
However, activity against nymphs was reduced at 75% relative humidity. Results underline the potential
of B. bassiana and M. anisopliae as agents for biological control of vectors of Chagas disease. Both
species occur naturally in peridomestic habitats of triatomines in Central Brazil and may contribute to
control these vectors and to reduce the risk of reinfestation of houses after eliminating domestic
vector species.
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Triatominae, Peridomiciliar, Ocorrência, Beauveria bassiana, Metarhizium anisopliae, Triatominae, Beauveria bassiana, Peridomestic, Metarhizium anisopliae, Occurrence
Citação
LUZ, Christian; ROCHA, Luiz F. N.; NERY, Gustavo V. Detection of entomopathogenic fungi in peridomestic triatomine-infested areas in Central Brazil and fungal activity against Triatoma infestans (Klug) (Hemiptera: Reduviidae). Neotropical Entomology, Londrina, v. 33, n. 6, p. 783-791, Nov./Dec. 2004.