The potential of Acmella oleracea (Jambu) extract in the control of semi-engorged Rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae) female ticks. Issue 4 (4th July 2018)

• Record Type: Journal Article
• Authors: de Oliveira, Patrícia Rosa; Anholeto, Luis Adriano; Rodrigues, Rodney Alexandre Ferreira; Bechara, Gervásio Henrique; de Carvalho Castro, Karina Neoob; Camargo Mathias, Maria Izabel
• Is Part Of: International journal of acarology. Volume 44:Issue 4/5(2018)
• Page Start: 192
• Page End: 197
• Publication Date: 2018-07-04
• Subjects: Extract -- Rhipicephalus sanguineus -- tick -- natural compound -- potential; Mites -- Periodicals; Mijten; Acarology -- Periodicals; 595.42
• DOI: 10.1080/01647954.2018.1472637
• Languages: English
• ISSNs: 0164-7954

Abstract

ABSTRACT: The present study evaluated the efficacy of Acmella oleracea extract, and the susceptibility of semi-engorged R . sanguineus females exposed to different concentrations of the extract, with lethal concentration 50 % (LC50 ) and confidence interval 95%. The ticks were mounted on Petri dishes and immersed in the different concentrations of the extract, distilled water or ethanol 50% + DMSO 1% for 5 minutes, dried and kept in BOD incubator for 7 days. The results showed the daily mortality rate among semi-engorged R. sanguineus females at different concentrations of the extract. The mortality data obtained in bioassay 2 were subjected to Probit analysis, through which a LC50 of 24, 883 mg/ml (limits: 22, 331 to 28, 003 mg/ml) was determined, at a 95% confidence interval. Thus, this study demonstrated the sensitivity and susceptibility of semi-engorged R. sanguineus females to Acmella oleracea extract. The acaricidal potential was effective as from the application of the extract at the concentration of 12.5 mg/ml and was dose-dependent. i.e., higher mortality rates were observed as the concentration increased, with LC50 of 24, 883 mg/ml reaching 100% at the concentration of 100 mg/ml in 24h.