Dataset Information

Acaricidal and Repellent Effects of Essential Oils against Ticks: A Review.

ABSTRACT: Tick control is a priority in order to prevent the transmission of vector-borne diseases. Industrial chemical acaricides and repellents have been the most efficient tools against hard ticks for a long time. However, the appearance of resistances has meant the declining effectiveness of the chemicals available on the market. The trend today is to develop alternative control methods using natural products to replace nonefficient pesticides and to preserve the efficient ones, hoping to delay resistance development. Traditional in vitro evaluation of acaricidal activity or resistance to synthetic pesticides have been reviewed and they mainly focus on just one species, the one host tick (Rhipicephalus (Boophilus) microplus (Acari: Ixodidae)). Recent reports have called for the standardization of natural product components, extraction techniques, and experimental design to fully discover their acaricidal potential. This study reviews the main variables used in the bibliography about the efficiency of natural products against ticks, and it proposes a unification of variables relating to ticks, practical development of bioassays, and estimation of ixodicidal activity.

SUBMITTER: Selles SMA

PROVIDER: S-EPMC8617816 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature

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Acaricidal and Repellent Effects of Essential Oils against Ticks: A Review.

Selles Sidi Mohammed Ammar SMA Kouidri Mokhtaria M González Marta G MG González Julia J Sánchez María M González-Coloma Azucena A Sanchis Jaime J Elhachimi Latifa L Olmeda A Sonia AS Tercero José Maria JM Valcárcel Félix F

Pathogens (Basel, Switzerland) 20211026 11

Tick control is a priority in order to prevent the transmission of vector-borne diseases. Industrial chemical acaricides and repellents have been the most efficient tools against hard ticks for a long time. However, the appearance of resistances has meant the declining effectiveness of the chemicals available on the market. The trend today is to develop alternative control methods using natural products to replace nonefficient pesticides and to preserve the efficient ones, hoping to delay resist ...[more]

PMID: 34832535

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Project description:A study was carried out to evaluate the acaricidal activities of crude methanolic extract of leaves of six medicinal plants, namely, Vernonia amygdalina, Calpurnia aurea, Schinus molle, Ricinus communis, Croton macrostachyus, and Nicotiana tabacum, against Rhipicephalus (Boophilus) decoloratus and Rhipicephalus pulchellus using an in vitro adult immersion test. Five graded concentrations of the crude extracts, 6.25, 12.5, 25, 50, and 100?mg/ml, were tested at different time intervals, and temporal changes in tick viability were recorded for 24 hours. Diazinon (0.1%) and distilled water were used as positive and negative controls, respectively. Standard procedures were applied to screen the phytochemical constituents of the tested plant parts. Phytochemical screening showed the presence of a condensed amount of tannins in all extracts. Starting from 30?min post exposure, the 100?mg/ml concentration of C. aurea and R. communis extracts has caused significantly higher mortality (P < 0.05) compared to the diazinon. A significant increase in tick mortality started 2?hr post exposure with diazinon and 50 and 100?mg/ml concentrations of S. molle. Vernonia amygdalina extract and diazinon showed a significant increase in tick mortality 3?hr post exposure with 100?mg/ml concentration. Similarly, a significant increase in tick mortality started 2?hr post exposure with diazinon and 100?mg/ml concentrations of C. macrostachyus and N. tabacum. At 24?hr post exposure, diazinon and 50 and 100?mg/ml concentrations of all the extracts have caused significantly higher tick mortality than the rest of the concentrations (P < 0.05). Higher concentrations of all the extracts had showed a comparable and strong acaricidal effect on Rhipicephalus (Boophilus) decoloratus and Rhipicephalus pulchellus having no significant difference with that of the positive control (P > 0.05) at 24?hr post exposure period. Tick killing activity of all evaluated plant extracts increases with increasing exposure time and concentration as well. Thus, all the tested plants could be used against Rhipicephalus (Boophilus) decoloratus and Rhipicephalus pulchellus as a potential alternative to substitute commercially available drugs. We recommend further study on fractionating each component separately and validating the materials.

Dataset Information

Acaricidal and Repellent Effects of Essential Oils against Ticks: A Review.

Publications

Acaricidal and Repellent Effects of Essential Oils against Ticks: A Review.

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