Chemical composition and acaricidal activity of essential oil from Lippia sidoides on larvae of Dermacentor nitens (Acari: Ixodidae) and larvae and engorged females of Rhipicephalus microplus (Acari: Ixodidae)
| Autor: | Erik Daemon, Renata da Silva Matos, Gilvandete M. P. Santiago, Roberto Wagner da Silva Góis, Viviane Zeringóta, Tatiane Oliveira Souza Senra, Caio Márcio de Oliveira Monteiro, Fernanda Calmon, Geovany Amorim Gomes, Mário Geraldo de Carvalho |
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| Rok vydání: | 2012 |
| Předmět: |
Zygote
Gas Chromatography-Mass Spectrometry law.invention chemistry.chemical_compound Animal science law Botany Oils Volatile Rhipicephalus Animals Acari Carvacrol Thymol Acaricides Essential oil Dermacentor General Veterinary biology Hatching General Medicine biology.organism_classification Survival Analysis Plant Leaves Infectious Diseases chemistry Larva Insect Science Rhipicephalus microplus Biological Assay Female Parasitology Gas chromatography Lippia Ixodidae |
| Zdroj: | Parasitology Research. 111:2423-2430 |
| ISSN: | 1432-1955 0932-0113 |
| DOI: | 10.1007/s00436-012-3101-9 |
| Popis: | The aim of this work was to identify the compounds and to investigate the acaricidal activity of the essential oil from the leaves of Lippia sidoides on Rhipicephalus microplus and Dermacentor nitens. The oil was obtained by hydrodistillation and analyzed by gas chromatography (GC/FID) and gas chromatography/mass spectrometry. In total, 15 compounds comprising 99.97 % of the total peak area were identified. The main constituent of the essential oil was thymol (67.60 %). The acaricidal activity was assessed by the modified larval packet test, with oil concentrations of 2.5, 5.0, 10.0, 15.0, and 20.0 μl/ml, and by the female immersion test with concentrations of 10.0, 20.0, 40.0, 60.0, and 80.0 μl/ml. The mortality of the R. microplus and D. nitens larvae was greater than 95 % starting at concentrations of 10.0 and 20.0 μl/ml, respectively. In the test with the engorged females, the L. sidoides essential oil starting at a concentration of 40.0 μl/ml caused a significant reduction (p < 0.05) in the values of the egg mass weight and egg production index. The viability of the eggs was affected in all the treated groups, with significantly lower hatching rates (p < 0.05) in relation to the control group. The control percentages at concentrations of 10.0, 20.0, and 30.0 μl/ml were 54, 57, and 72 %, and reached 100 % at the highest two concentrations (60.0 and 80.0 μl/ml). Therefore, it can be concluded that the essential oil from the leaves of L. sidoides has acaricidal activity on R. microplus and D. nitens. |
| Databáze: | OpenAIRE |
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