Biocidal effect of a hexane-soluble extract of Lippia graveolens Kunth (Verbenaceae) / Efecto biocida del extracto hexánico de Lippia graveolens Kunth (Verbenaceae)
Bol. latinoam. Caribe plantas med. aromát
; 17(4)jul. 2018. tab, ilus, graf
Article
in En
| LILACS
| ID: biblio-915429
Responsible library:
CL1.1
ABSTRACT
Lippia graveolens Kunth (Verbenaceae) is an economically important shrub known in Mexico as Oregano. In this work, the biocidal effect of the hexane extract of L. graveolens leaves was evaluated on two crop pests. Thus, larvae of Spodoptera frugiperda were fed with mixtures of extract and artificial diet. The nematicidal activity was evaluated on juveniles of Meloydogine javanica. Regarding S. frugiperda, quantitative differences between treatments and control were observed in dead pupae, surviving adults, and deformed adults (P < 0.05). All the surviving adults from the extract treatments were deformed. Nematicidal effect was registered, the LC50 and LC90 were 0.672 (0.654-0.690) and 0.965 (0.937-0.998) mg/mL respectively. The extract was characterized by NMR and GC-MS, being thymol the most abundant component (70.6%) in addition to carvacrol (22.8%). The results suggest the consideration of the hexane extract of L. graveolens leaves within the alternatives for the biological control of pests.
RESUMEN
Lippia graveolens Kunth (Verbenaceae) es un arbusto con importancia econoÌmica conocido en MeÌxico como OreÌgano. En eÌste trabajo se evaluoÌ el efecto biocida del extracto hexaÌnico de hojas L. graveolens sobre dos plagas agriÌcolas. AsiÌ, larvas de S. frugiperda fueron alimentadas con mezclas de dieta artificial y extracto. La actividad nematicida fue evaluada en juveniles de Meloydogine javanica, Respecto a S. frugiperda, se observaron diferencias cuantitativas entre tratamiento y control en cuanto a pupas muertas, adultos sobrevivientes y adultos deformes (P < 0.05). Todos los adultos provenientes de tratamientos con extracto estuvieron malformados. Hubo efecto nematicida, calculaÌndose CL50 y CL90 de 0.672 (0.654-0.690) y 0.965 (0.937-0.998) mg/mL respectivamente. El extracto se caracterizoÌ por RMN y CG-EM. Los compuestos maÌs abundantes fueron timol (70.6%), ademas del carvacrol (22.8%). Los resultados sugieren considerar al extracto hexaÌnico de hojas de L. graveolens dentro de las alternativas para el control bioloÌgico de plagas.
Key words
Full text:
1
Index:
LILACS
Main subject:
Plant Extracts
/
Spodoptera
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Plant Leaves
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Lippia
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Antinematodal Agents
Language:
En
Journal:
Bol. latinoam. Caribe plantas med. aromát
Journal subject:
BOTANICA
/
MEDICINA
/
Plantas Medicinais
/
Terapias Complementares
Year:
2018
Type:
Article
/
Project document