Laboratory and field studies for the control of Chagas disease vectors using the fungus Metarhizium anisopliae.
Arch Insect Biochem Physiol
; 105(4): e21745, 2020 Dec.
Article
em En
| MEDLINE
| ID: mdl-33029844
ABSTRACT
Chagas disease is one of the most important insect-vectored diseases in Brazil. The entomopathogenic fungus Metarhizium anisopliae was evaluated against nymphs and adults of Panstrongylus megistus, Triatoma infestans, and T. sordida. Pathogenicity tests at saturated humidity demonstrated high susceptibility to fungal infection. The shortest estimates of 50% lethal time (LT50 ) for P. megistus varied from 4.6 (isolate E9) to 4.8 days (genetically modified strain 157p). For T. infestans, the shortest LT50 was 6.3 (E9) and 7.3 days (157p). For T. sordida, the shortest LT50 was 8.0 days (157p). The lethal concentration sufficient to kill 50% of T. infestans (LC50 ) was 1.9 × 107 conidia/ml for strain 157p. In three chicken coops that were sprayed with M. anisopliae, nymphs especially were well controlled, with a great population reduction of 38.5% after 17 days. Therefore M. anisopliae performed well, controlling Triatominae in both laboratory and field studies.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Panstrongylus
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Triatoma
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Controle Biológico de Vetores
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Metarhizium
Limite:
Animals
País como assunto:
America do sul
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Brasil
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article