Data/hora: 12/06/2024 07:59:10

Biblioteca(s): | Embrapa Gado de Leite.
Data corrente: | 22/12/2021
Data da última atualização: | 22/12/2021
Autoria: | VALE, L.; PAULA, L. G. F. de; VIEIRA, M. S.; ALVES, S. das G. A.; MORAES JUNIOR, N. R. de; GOMES, M. D. F.; TEIXEIRA, W. F. P.; RIZZO, P. V.; FREITAS, F. M. C.; FERREIRA, L. L.; LOPES, W. D. Z.; MONTEIRO, C.
Afiliação: | LETÍCIA VALE, Universidade Federal de Goias; LUIZA GABRIELLA FERREIRA DE PAULA, Universidade Federal de Goiás; MIRNA SECCHIS VIEIRA, Universidade Federal de Goiás; SUSY DAS GRAÇAS ALECRIM ALVES, Universidade Federal de Goiás; NELIO ROBERTO DE MORAES JUNIOR, Universidade Federal de Goiás; MARCOS DANIEL FILGUEIRAS GOMES, Universidade Federal de Goiás; WESLEN FABRÍCIO PIRES TEIXEIRA, Universidade Federal de Goiás; PRICILA VETRANO RIZZO, CNPGL; FERNANDA MARA CUNHA FREITAS, CNPGL; LORENA LOPES FERREIRA, Universidade Federal de Minas Gerais; WELBER DANIEL ZANETTI LOPES, Universidade Federal de Goiás; CAIO MONTEIRO, Universidade Federal de Goiás.
Título: | Binary combinations of thymol, carvacrol and eugenol for Amblyomma sculptum control: Evaluation of in vitro synergism and effectiveness under semi-field conditions.
Ano de publicação: | 2021
Fonte/Imprenta: | Ticks and Tick-borne Diseases, v. 12, 101816, 2021.
DOI: | https://doi.org/10.1016/j.ttbdis.2021.101816
Idioma: | Inglês
Conteúdo: | This study aimed to investigate the in vitro acaricidal effect of thymol, carvacrol and eugenol (binary combinations) and their synergistic effect on unfed larvae and nymphs of Amblyomma sculptum, estimate the cost to prepare a formulation with these compounds, and evaluate the formulations under semi-field conditions against A. sculptum larvae. To evaluate the acaricidal effect of the compounds alone or their binary combinations (1:1 ratio) the larval packet test was performed using six concentrations (0.3125 to 10.0 mg/mL) for larvae and seven concentrations (2.5 to 20.0 mg/mL) for nymphs. The cost to produce 1 L of thymol, carvacrol and eugenol solutions, combined or alone, was estimated. In the semi-field test, formulations were sprayed on Panicum maximum plots experimentally infested with unfed A. sculptum larvae. In the in vitro tests with larvae, a synergistic effect (synergism and moderate synergism) was observed for thymol + eugenol at all concentrations tested, while thymol + carvacrol and eugenol + carvacrol showed a synergistic effect at the concentration of 5.0 mg/mL. In the in vitro tests with nymphs, thymol + eugenol, thymol + carvacrol and carvacrol + eugenol showed a synergistic effect (synergism and moderate synergism) at a concentration of 5.0 mg/mL and higher. Combining the compounds reduced the concentrations required to obtain mortality rate above 95%, resulting in lower costs. Under semi-field conditions, the treatments with thymol + eugenol and carvacrol + eugenol showed efficacies of 63.2% and 42.6%, respectively. We conclude that, depending on the concentrations, the binary combinations of thymol, carvacrol and eugenol have a synergistic acaricidal effect on unfed A. sculptum larvae and nymphs, and under semi-field conditions the associations between thymol + eugenol and carvacrol + eugenol were effective against A. sculptum larvae.
Palavras-Chave: | Amblyomma sculptum; Timol.
Thesagro: | Acaricida; Larva; Ninfa.
Thesaurus Nal: | Carvacrol; Eugenol; Phenylpropanoids; Ticks.
Categoria do assunto: | O Insetos e Entomologia
Registro original: | Embrapa Gado de Leite (CNPGL)
Exemplares: | CNPGL - (25518-1) - UPC - AP - DD -  -  -  - DIS