[Dengue vector control using ether fractions from two plants (Asteraceae) as larvicide]. / Control del vector del dengue utilizando fracciones etéreas de dos plantas (Asteraceae) como larvicidas.
Rev Salud Publica (Bogota)
; 15(2): 227-36, 2013.
Article
em Es
| MEDLINE
| ID: mdl-24892666
OBJECTIVE: Evaluating the larvicidal activity of two ether factions from Asteraceae (the aster, daisy or sunflower family, i.e. Heli opsisoppositifolia (L.) Druce (oxeye, sunflower-like) and Jaegeria hirta (Lag.) Less (weed-like)) on Aedes (Stegomyia) aegypti (L.) final third instar or initial fourth instar larvae near the town of Armenia in the Quindío Department in Colombia. METHODS: H. oppositifolia and J. hirta plants were collected and submitted to phytochemical analysis. Ether fractions were prepared form both species to assess 11 concentrations for determining LC50, LC90 and LC95 lethal concentrations after 24 and 48 h. The LC50, LC90 and LC95 results were used to create a mathematical model for describing lethal population-concentration dynamics. RESULTS: Phytochemical analysis identified tannins, flavonoids, quinones, cardiac glycosides, sterols, lactones, terpenes, courmarins and alkaloids in H. oppositifolia and J. hirta. LC after 48 h regarding J. hirta (LC50 24, LC90 70 and LC95 93 ppm) was lower than those for H. oppositifolia (LC50 39, LC90 77 and LC95 94 ppm). A factorial ANOVA test confirmed this trend: 66 %, F=18.5 and p<0.05 for J. hirta and 34 %, F=18.5 and p<0.05 for H. oppositifolia. The mathematical simulation model suggested that using LC50 every 15 days and LC90 and LC95 every 30 days from either of these species led to the same response compared to using LC90 and LC95 every 30 days or LC50 every 15 days. CONCLUSION: Both species had a larvicidal effect. However, J. Hirta turned out to be more promising as an eventual bioinsecticide for controlling A. Aegypti immature states.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Extratos Vegetais
/
Controle de Mosquitos
/
Asteraceae
/
Aedes
/
Dengue
/
Insetos Vetores
Tipo de estudo:
Evaluation_studies
/
Prognostic_studies
Limite:
Animals
País/Região como assunto:
America do sul
/
Colombia
Idioma:
Es
Revista:
Rev Salud Publica (Bogota)
Assunto da revista:
SAUDE PUBLICA
Ano de publicação:
2013
Tipo de documento:
Article
País de publicação:
Colômbia