Investigation of activity of monoterpenes and phenylpropanoids against immature stages of Amblyomma cajennense and Rhipicephalus sanguineus (Acari: Ixodidae)
| Autor: | Renata da Silva Matos, Erik Daemon, Ralph Maturano, Diego Melo, Geovany Amorim Gomes, Tatiane Oliveira Souza Senra, Viviane Zeringóta, Fernanda Calmon, Mário Geraldo de Carvalho, Caio Márcio de Oliveira Monteiro |
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| Rok vydání: | 2013 |
| Předmět: |
Veterinary medicine
Ixodidae Propanols Rhipicephalus sanguineus Amblyomma cajennense Toxicology chemistry.chemical_compound Animals Acari Carvacrol Nymph Thymol Acaricides General Veterinary biology Dose-Response Relationship Drug General Medicine biology.organism_classification Eugenol Dose–response relationship Infectious Diseases chemistry Insect Science Larva Monoterpenes Parasitology |
| Zdroj: | Parasitology research. 112(10) |
| ISSN: | 1432-1955 |
| Popis: | The objective of this study was to assess the acaricidal activity of carvacrol, thymol, eugenol, and (E)-cinnamaldehyde on unengorged larvae and nymphs of Amblyomma cajennense and Rhipicephalus sanguineus, using the modified larval packet test. Carvacrol, eugenol, and (E)-cinnamaldehyde were tested at concentrations of 2.5, 5.0, 10.0, 15.0, and 20.0 μl/ml, while thymol was tested at concentrations of 2.5, 5.0, 10.0, 15.0, and 20.0 mg/ml, in all cases with 10 repetitions per treatment. For the A. cajennense larvae, mortality rates caused by carvacrol, thymol, eugenol, and (E)-cinnamaldehyde at the lowest concentration were 45.0, 62.7, 10.2, and 81.6%, respectively, reached 100% at the concentration of 5.0 μl/ml for carvacrol and (E)-cinnamaldehyde and 5.0 mg/ml for thymol, while this mortality was observed at 15.0 μl/ml for eugenol. For the nymphs of this species, carvacrol and thymol caused 100% mortality starting at a concentration of 5.0 μl/ml and 10.0 mg/ml, respectively, while eugenol caused 100% mortality at 20.0 μl/ml and the mortality caused by (E)-cinnamaldehyde did not exceed 64%. In the tests with R. sanguineus larvae, the lowest concentration of carvacrol and (E)-cinnamaldehyde resulted in 100% mortality, while this percentage was observed starting at 10.0 μl/ml for eugenol. For nymphs, carvacrol and thymol at the smallest concentration caused 100% lethality, unlike the results for eugenol and (E)-cinnamaldehyde, where 100% mortality was only observed starting at the concentration of 10.0 μl/ml. The results obtained indicate that the tested substances have acaricidal activity on unengorged larvae and nymphs of A. cajennense and R. sanguineus. |
| Databáze: | OpenAIRE |
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