Efficacy of carvacrol on Rhipicephalus (Boophilus) microplus engorged female ticks (Canestrini, 1887) (Acari: Ixodidae): effects on mortality and reproduction.
Autor: Pereira Junior, Amilcar Machado; Camargo-Mathias, M. I.; Daemon, E.; Peconick, A. P.; Lima-Souza, J. R.; Oliveira, P. R.; Braga, A. S.; Lara, L. J.; Remedio, R. N.
Publication year: 2020
Natural product research
issn:1478-6427 1478-6419
doi: 10.1080/14786419.2019.1569657
Abstract:
The activity of carvacrol was evaluated in R. microplus female ticks by estimating the mean lethal concentration (LC(50)) and the acaricidal efficacy. Ticks were subjected to the Adult Immersion Test (AIT) to calculate LC(50). From this value, the AIT was performed again at the concentrations of 20%, 40%, 60%, 80% and 100% of the LC(50). Two control groups were established: one treated with distilled water and one with the solvent (ethanol 50%). The following parameters were evaluated: female weight before oviposition, egg mass weight, pre-oviposition and incubation period, hatching percentage, egg production index, fecundity rate, estimated reproduction, reduction in oviposition and hatching, and product efficacy. The obtained LC(50) was 20.11 mg/mL. Egg mass weight, egg production index, pre-oviposition and fecundity rates of groups treated with 80% and 100% of LC(50) were statistically different when compared to control groups. The product efficacy in groups treated with 100% of LC(50) was 61.10%.
Language: eng
Rights:
Pmid: 30761912
Tags: Female; Animals; Body Weight; Mortality; Phytotherapy; control; Fertility; Lethal Dose 50; Reproduction; Acaricides/*pharmacology; cattle; Cymenes/*pharmacology; LC50; Oviposition/*drug effects; Rhipicephalus/*drug effects/*physiology; ticks
Link: https://pubmed.ncbi.nlm.nih.gov/30761912/
