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Biocide activity of Annona coriacea seeds extract on Rhodnius neglectus (Hemiptera: Reduviidae)
Pinheiro Carneiro, Ângela; Barbosa Pereira, Mônica Josene; Galbiati, Carla.
  • Pinheiro Carneiro, Ângela; Universidade do Estado de Mato Grosso. Cáceres. BR
  • Barbosa Pereira, Mônica Josene; Universidade do Estado de Mato Grosso. Cáceres. BR
  • Galbiati, Carla; Universidade do Estado de Mato Grosso. Cáceres. BR
Rev. biol. trop ; 61(1): 419-427, Mar. 2013. tab
Article in English | LILACS | ID: lil-674091
ABSTRACT
The use of synthetic insecticides for insect control may lead to different kind of problems, such as vector resistance to insecticides. To avoid these problems, a new research area to study botanical products as possible disease vectors controls, has become a feasible alternative. The purpose of this research was to evaluate the biocide activity of the ethanol extract of seeds of Annona coriacea on Rhodnius neglectus (Chagas disease vector) nymphs and adults. For this, different concentrations extracts were evaluated 25, 50, 100 and 200mg/ mL, and water in DMSO (20%) was used as control. The experimental design was completely randomized and we conducted the bioassay with nymphs and adults, with 10 nymphs and 10 adults (five males and five females) per treatment. Extract action was evaluated in both bioassays, in order to identify possible effects of mortality and life cycle interruption of nymphs and adults during a 28-day-period. The results obtained showed that the extract of A. coriacea was able to disrupt the development of nymphs and adults of R. neglectus, with a mortality rate of more than 90%, 36% and 100%, at the highest concentrations, respectively. There was also molting inhibition in nymphs, lower reproductive capacity in females, feeding deterrence and morphological changes in nymphs and adults. We concluded that the extract of A. coriacea has insecticide action on nymphs and adults of R. neglectus.
RESUMEN
La enfermedad de Chagas se convirtió en un problema de salud debido a su importancia epidemiológica, es producida por el protista Trypanosoma cruzi, cuyos insectos vectores son del género Triatoma y Panstrongylus. El objetivo de este estudio fue evaluar la actividad biocida del extracto de Annona coriacea en las ninfas de Rhodnius neglectus y en sus adultos. Se evaluaron 14 concentraciones de 25, 50, 100 y 200mg/ml del extracto etanólico, así como el control, en este caso agua de DMSO (20%). Se utilizo un diseño completamente aleatorizado con tres repeticiones para el bioensayo con 10 ninfas y 10 adultos (cinco machos y cinco hembras) para cada tratamiento. La acción del extracto se observo durante 28 días en ambos bioensayos. Los resultados obtenidos mostraron que el extracto de A. coriacea fue capaz de interrumpir el desarrollo de las ninfas y adultos de R. neglectus, con una mortalidad de más del 90%, 36% y 100%, correspondiendo a las concentraciones más altas. También hubo inhibición de la muda de las ninfas, una menor capacidad reproductiva de las hembras, disuasión alimentaria y cambios morfológicos en las ninfas y adultos. Se concluye que el extracto de A. coriacea presentó acción insecticida en ninfas y adultos de R. neglectus.
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Full text: Available Index: LILACS (Americas) Main subject: Rhodnius / Plant Extracts / Annona / Insect Vectors / Insecticides Limits: Animals Language: English Journal: Rev. biol. trop Journal subject: Biology / Tropical Medicine Year: 2013 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade do Estado de Mato Grosso/BR

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Full text: Available Index: LILACS (Americas) Main subject: Rhodnius / Plant Extracts / Annona / Insect Vectors / Insecticides Limits: Animals Language: English Journal: Rev. biol. trop Journal subject: Biology / Tropical Medicine Year: 2013 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade do Estado de Mato Grosso/BR