Associações binárias de timol, carvacrol e eugenol para o controle de fases imaturas de vida livre de Amblyomma sculptum
Nenhuma Miniatura disponível
Data
2020-08-17
Autores
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Goiás
Resumo
His study aimed to evaluate whether the associations between thymol, carvacrol and eugenol on the immature life stages of Amblyomma sculptum have a synergistic effect, by means of in vitro test and under semi field conditions, as well as to evaluate the cost-benefit ratio of formulations. To assess the synergism, the substances were tested in vitro in isolation and associated at concentrations of 0.3125; 0.625; 1.25; 2.5; 5.0 and 10.0 mg/mL on non-fed larvae; and 2.5; 3.75; 5.0; 7.5; 10.0; 15.0 and 20 mg/mL on non-fed nymphs. For the test in semi field conditions, the two associations that obtained the best efficacy in in vitro tests were selected for application on plots of Panicum maximum artificially infested with A. sculptum larvae. In in vitro tests with larvae, the association between thymol and eugenol demonstrated synergistic effect at all tested concentrations; treatments associating thymol + carvacrol and eugenol + carvacrol demonstrated synergistic effect at a concentration of 5.0 mg/mL. In in vitro tests with nymphs, the association between thymol + eugenol showed synergistic effect at a concentration of 5.0 mg/mL; the association between thymol + carvacrol resulted in a synergistic effect at a concentration of 10.0 mg/mL while treatments with the association of carvacrol + eugenol showed moderate synergism at concentrations of 5.0; 7.5 and 10.0 mg/mL. The association of the substances allowed lower use to achieve mortality rates higher than 95% in in vitro tests, resulting in cost reduction. In semi field conditions the efficacy of the associations was 63.2% for thymol + eugenol association and 42.6% for carvacrol + eugenol association. Thus, depending on concentration, synergistic effects of binary associations between thymol, carvacrol and eugenol were observed for immature stages of A. sculptum, in addition to allowing cost reduction with the active principle for formulation development.
Descrição
Citação
SILVA, F. L. V. Associações binárias de timol, carvacrol e eugenol para o controle de fases imaturas de vida livre de Amblyomma sculptum. 2020. 71 f. Dissertação (Mestrado em Ciência Animal) - Universidade Federal de Goiás, Goiânia, 2020.