Control of Tetranychus urticae Koch by extracts of three essential oils of chamomile, marjoram and Eucalyptus
Asian Pacific Journal of Tropical Biomedicine
;
(12): 24-30, 2012.
Artigo
em Inglês
| WPRIM
| ID: wpr-303629
ABSTRACT
<p><b>OBJECTIVE</b>To evaluate the acaricidal activity of extracts of three essential oils of chamomile, marjoram and Eucalyptus against Tetranychus urticae (T. urticae) Koch.</p><p><b>METHODS</b>Extracts of three essential oils of chamomile, marjoram and Eucalyptus with different concentrations (0.5%, 1.0%, 2.0%, 3.0% and 4.0%) were used to control T. urticae Koch.</p><p><b>RESULTS</b>The results showed that chamomile (Chamomilla recutita) represented the most potent efficient acaricidal agent against Tetranychus followed by marjoram (Marjorana hortensis) and Eucalyptus. The LC50 values of chamomile, marjoram and Eucalyptus for adults were 0.65, 1.84 and 2.18, respectively and for eggs 1.17, 6.26 and 7.33, respectively. Activities of enzymes including glutathione-S-transferase, esterase (α-esterase and β-esterase) and alkaline phosphatase in susceptible mites were determined and activities of enzymes involved in the resistance of acaricides were proved. Protease enzyme was significantly decreased at LC50 of both chamomile and marjoram compared with positive control. Gas chromatography-mass spectrometer (GC-MS) proved that the major compositions of Chamomilla recutita are α-bisabolol oxide A (35.251%), and trans-β-farersene (7.758%), while the main components of Marjorana hortensis are terpinene-4-ol (23.860%), p-cymene (23.404%) and sabinene (10.904%).</p><p><b>CONCLUSIONS</b>It can be concluded that extracts of three essential oils of chamomile, marjoram and Eucalyptus possess acaricidal activity against T. urticae.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Farmacologia
/
Resistência a Medicamentos
/
Óleos Voláteis
/
Análise de Sobrevida
/
Química
/
Camomila
/
Tetranychidae
/
Origanum
/
Enzimas
/
Eucalyptus
Limite:
Animais
Idioma:
Inglês
Revista:
Asian Pacific Journal of Tropical Biomedicine
Ano de publicação:
2012
Tipo de documento:
Artigo
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