check for this species in other resources - natural insecticides - Lutzomyia longipalpis check for this species in other resources - Derris amazonica check for this species in other resources - Antonia ovata check for this species in other resources - Roraima - Brazil"/>
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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 97, No. 5, 2002, pp. 737-742
Bioline Code: oc02140
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 97, No. 5, 2002, pp. 737-742

 en Preliminary Assays Indicate that Antonia ovata check for this species in other resources (Loganiaceae) and Derris amazonica check for this species in other resources (Papilionaceae), Ichthyotoxic Plants Used for Fishing in Roraima, Brazil, Have an Insecticide Effect on Lutzomyia longipalpis check for this species in other resources (Diptera: Psychodidae: Phlebotominae)
José Francisco Luitgards-Moura; Eloy Guillermo Castellón Bermudez; Arnaldo Felisberto Imbiriba da Rocha; Pantelis Tsouris & Maria Goreti Rosa-Freitas

Abstract

Laboratory-reared Lutzomyia longipalpis check for this species in other resources (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 check for this species in other resources and Derris amazonica check for this species in other resources , 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% for extracts of A. ovata (LD 50 = 233 mg/ ml), and 100% for D. amazonica (LD 50 = 212 mg/ ml) whereas in the control groups maximum mortality never surpassed 13%. Preliminary assays indicated that A. ovata and D. amazonica displayed significant insecticide effect against L. longipalpis .

Keywords
ichthyotoxic extract - timbó check for this species in other resources - natural insecticides - Lutzomyia longipalpis check for this species in other resources - Derris amazonica check for this species in other resources - Antonia ovata check for this species in other resources - Roraima - Brazil

 
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