INVESTIGADORES
MURRAY Ana Paula
artículos
Título:
COMPOSITION AND BIOLOGICAL ACTIVITY OF ESSENTIAL OILS FROM LABIATAE AGAINST Nezara viridula (HEMIPTERA: PENTATOMIDAE), SOYBEAN PEST.
Autor/es:
WERDIN GONZALEZ, JORGE; GUTIERREZ, MARIA M.; ANA PAULA MURRAY; ADRIANA FERRERO
Revista:
PEST MANAGEMENT SCIENCE
Editorial:
JOHN WILEY & SONS LTD
Referencias:
Año: 2011 vol. 67 p. 948 - 955
ISSN:
1526-498X
Resumen:
BACKGROUND: Plant essential oils have been recognized as an important natural source of insecticide. This study analyzed the chemical constituents and bioactivity of essential oils that were isolated via hydrodistillation from Origanum vulgare (oregano) and Thymus vulgaris (thyme) against eggs, second instar and adults of Nezara viridula. RESULTS: The major component of oregano was p-cymene and for thyme, thymol. The ovicidal activity was tested by topical application; the essential oil from thyme was more effective. The fumigant activity was evaluated in an enclosed chamber; the LC50 values for oregano were 26.8 and 285.6 µg ml-1 for nymphs and adults, respectively; for thyme were 8.9 µg ml-1for nymphs and 219.2 µg ml-1 for adults. To evaluate contact activity a glass-vial bioassay was used; the LC50 values for oregano were 1.7 and 169.2 µg cm-2 for nymphs and adults, respectively; for thyme were 3.5 and 48.8 µg cm-2, respectively. The LT50 analyzes for contact and fumigant bioassays indicated that thyme was more toxic for nymphs and adults than oregano. Both oils produced repellency on nymphs and adults. CONCLUSION: These results showed that the essential oils from O. vulgare and T. vulgaris could be applicable to the management of N. viridula.