Preliminary assays indicate that Antonia ovata (Loganiaceae) and Derris amazonica (Papilionaceae), ichthyotoxic plants used for fishing in Roraima, Brazil, have an insecticide effect on Lutzomyia longipalpis (Diptera: Psychodidae: Phlebotominae)
Mem. Inst. Oswaldo Cruz
;
97(5): 737-742, July 2002. tab, graf
Artigo
em Inglês
| LILACS
| ID: lil-321199
RESUMO
Laboratory-reared Lutzomyia longipalpis (Lutz and Neiva 1912) was tested with extracts of two ichthyotoxic plants, known as timbós, used as fishing poison in the Amazon. Phlebotomines, L. longipalpis, and plants, Antonia ovata and Derris amazonica, were collected in the Raposa-Serra do Sol Indian Reserve, a focus of visceral leishmaniasis in the State of Roraima, Brazil. Extracts were prepared from dried leaves of A. ovata and roots of D. amazonica that were percolated in water, filtered and dried out at 50°C. The solid extract obtained was diluted in water at 150, 200 and 250 mg/ml. The solution was blotted in filter paper placed at the bottom of cylindric glass tubes containing sand flies. For each plant extract and dilution, two series of triplicates with 5 male and 5 female specimens of L. longipalpis were used. Mortality was recorded every 2 h during 72 h of exposure. At 72 h the mortality was as high as 80 percent for extracts of A. ovata (LD50 = 233 mg/ ml), and 100 percent for D. amazonica (LD50 = 212 mg/ ml) whereas in the control groups maximum mortality never surpassed 13 percent. Preliminary assays indicated that A. ovata and D. amazonica displayed significant insecticide effect against L. longipalpis
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Psychodidae
/
Extratos Vegetais
/
Derris
/
Loganiaceae
/
Inseticidas
Limite:
Animais
País/Região como assunto:
América do Sul
/
Brasil
Idioma:
Inglês
Revista:
Mem. Inst. Oswaldo Cruz
Assunto da revista:
Medicina Tropical
/
Parasitologia
Ano de publicação:
2002
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Fiocruz/BR
/
Instituto Nacional de Pesquisas da Amazônia/BR
/
Universidade Federal de Roraima/BR
/
Universidade do Amazonas/BR
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