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Ticks Tick Borne Dis. 2017 Jan;8(1):65-72. doi: 10.1016/j.ttbdis.2016.09.018. Epub 2016 Sep 30.

Potential action of extract of Acmella oleracea (L.) R.K. Jansen to control Amblyomma cajennense (Fabricius, 1787) (Acari: Ixodidae) ticks.

Author information

1
Department of Biology, Institute of Biosciences, São Paulo State University, UNESP, Av. 24 A, no 1515, 199, 13506-900, Rio Claro, SP, Brazil.
2
Division of Chemistry of Natural Products, CPQBA/UNICAMP, Av. Alexandre Cazellato, 999, 13140-000, Paulínia, SP, Brazil.
3
Department of Preventive Veterinary Medicine and Animal Health, University of São Paulo- USP, Av. Prof. Dr. Orlando Marques de Paiva, 87, 05508-270, Cidade Universitária, São Paulo, SP, Brazil.
4
Department of Ecology, Institute of Biosciences, São Paulo State University, UNESP, Av. 24 A, 1515, 13506-900, Rio Claro, SP, Brazil.
5
Embrapa Meio-Norte, BR 343, km 35, CP 341, 64.200-970, Parnaíba, PI, Brazil.
6
Department of Biology, Institute of Biosciences, São Paulo State University, UNESP, Av. 24 A, no 1515, 199, 13506-900, Rio Claro, SP, Brazil. Electronic address: micm@rc.unesp.br.

Abstract

The use of synthetic acaricides is currently the main method to control ticks. However, the indiscriminate use of these chemicals can lead to the selection of resistant individuals and in the accumulation of chemical residues in the environment, contaminating the soil and water streams, consequently affecting the flora, fauna, and the human beings as well. In this sense, the objective of this study was to investigate the acaricidal effect of crude ethanolic extract of Acmella oleracea (L.) R.K. Jansen aerials parts at different concentrations on fed males and semi-engorged females of A. cajennense s.s. An in vitro bioassay (Adult Immersion Test) was carried out to determine the lethal concentration 50 (LC50) of ethanolic extract, calculated by Probit analysis. The results showed that the fed males were sensitive to all the concentrations of A. oleracea ethanolic extract, and mortality rate progressively increased (15-65%) in higher ethanolic extract concentrations. However, semi-engorged females were not sensitive to all the concentrations used here. In the highest concentration (100mg/mL), a mortality rate of 100% was observed after 72h of exposure, indicating that the acaricidal effect would probably be dose-dependent. The LC50 values obtained for the fed A. cajennense s.s males and semi-engorged females were 29.4534mg/mL (limits: 24.4467-41.3847mg/mL) and LC50=17.6335mg/mL (limits: 5.2506-23.5335mg/mL), respectively.

KEYWORDS:

Acaricide; Jambu; LC(50); Natural control; Ticks

PMID:
27707616
DOI:
10.1016/j.ttbdis.2016.09.018
[Indexed for MEDLINE]

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