Assessment of different Lippia sidoides genotypes regarding their acaricidal activity against Rhipicephalus (Boophilus) microplus

Abstract The aim of this study was to select different genotypes of Lippia sidoides with the highest activity against larvae and engorged females of the tick Rhipicephalus (Boophilus) microplus. The germplasms studied were LSID006, LSID102, LSID103 and LSID104. The LSID104 genotype, that presented carvacrol as a major constituent, was the germplasm with the worst larvicide effect (LC50 2.99 mg/mL). The LSID006 genotype was the least effective against engorged females (LC50 12.46 mg/mL), and it was chemically similar to the LSID102 genotype, which presented the highest acaricide activity (LC50 2.81 mg/mL). We conclude that chemical similarity of the germplasms was not correlated with acaricide activity against R. (B.) microplus. The essential oil of L. sidoides is a potent natural agent. However, the findings of this work provide a better understanding for product development based on this natural product, which must consider synergic effects or the action of minor compounds.

Download Full-text

Acaricidal activity of the essential oil from Tetradenia riparia (Lamiaceae) on the cattle tick Riphicephalus (Boophilus) microplus (Acari; Ixodidae)

Planta Medica ◽

10.1055/s-0031-1282986 ◽

2011 ◽

Vol 77 (12) ◽

Author(s):

ZC Gazim ◽

CM Rezende ◽

LE Cortez ◽

DA Cortez

Keyword(s):

Essential Oil ◽

Acaricidal Activity ◽

Boophilus Microplus ◽

Cattle Tick

Download Full-text

Acaricidal activity of Lippia gracilis essential oil and its major constituents on the tick Rhipicephalus (Boophilus) microplus

Veterinary Parasitology ◽

10.1016/j.vetpar.2012.12.046 ◽

2013 ◽

Vol 195 (1-2) ◽

pp. 198-202 ◽

Cited By ~ 48

Author(s):

Elizangela Mércia de Oliveira Cruz ◽

Livio Martins Costa-Junior ◽

Jessika Andreza Oliveira Pinto ◽

Darlisson de Alexandria Santos ◽

Sandra Alves de Araujo ◽

...

Keyword(s):

Essential Oil ◽

Acaricidal Activity ◽

Boophilus Microplus

Download Full-text

Chemical Composition and Acaricidal Activity of Nemuaron vieillardii Essential Oil against the Cattle Tick Rhipicephalus (Boophilus) microplus

Natural Product Communications ◽

10.1177/1934578x1601101235 ◽

2016 ◽

Vol 11 (12) ◽

pp. 1934578X1601101

Author(s):

Nicolas Lebouvier ◽

Thomas Hue ◽

Joseph Brophy ◽

Edouard Hnawia ◽

Mohammed Nour

Keyword(s):

Gas Chromatography ◽

Chemical Composition ◽

Essential Oil ◽

Tick Control ◽

Acaricidal Activity ◽

Boophilus Microplus ◽

Gas Chromatography Mass Spectrometry ◽

Cattle Tick ◽

Caryophyllene Oxide ◽

Human Carcinogen

Essential oil from leaves of Nemuaron vieillardii (Baill.) Baill., a shrub used in the kanak pharmacopeia, was analyzed by gas chromatography and combined gas chromatography-mass spectrometry. The main compounds identified were safrole (49.7%), linalool (8.0%), δ-cadinene (5.1%), caryophyllene oxide (4%) and α-copaene (2.4%). This chemical composition is consistent with leaf oils of the Atherospermataceae family and demonstrates the proximity of the two genera Nemuaron and Atherosperma as regards to their essential oil compositions. The modified Larval Packet Test (LPT) was used to assess acaricidal effect of N. vieillardii essential oil on larvae of the cattle tick Rhipicephalus (Boophilus) microplus and LC50 was then calculated to 14.67%. High content of safrole in this oil which is suspected of being a human carcinogen, poses the problem of the use of this oil in a perspective of development of alternative tick control strategy and in the traditional medicinal consumption of Nemuaron vieillardii.

Download Full-text

New Labdanes with Antimicrobial and Acaricidal Activity: Terpenes of Callitris and Widdringtonia (Cupressaceae)

Antibiotics ◽

10.3390/antibiotics9040173 ◽

2020 ◽

Vol 9 (4) ◽

pp. 173 ◽

Cited By ~ 3

Author(s):

Nicholas J. Sadgrove ◽

Haytham Senbill ◽

Ben-Erik Van Wyk ◽

Ben W. Greatrex

Keyword(s):

South Africa ◽

Essential Oil ◽

Essential Oils ◽

South African ◽

Acaricidal Activity ◽

Chemical Similarity ◽

Lower Yield ◽

Isopimaric Acid ◽

Diterpene Acids ◽

Sandaracopimaric Acid

In spite of the evidence for antimicrobial and acaricidal effects in ethnobotanical reports of Callitris and Widdringtonia, the diterpene acids from Widdringtonia have never been described and no comparison to the Australian clade sister genus Callitris has been made. The critically endangered South African Clanwilliam cedar, Widdringtonia wallichii (syn. W. cedarbergensis), of the Cederberg Mountains was once prized for its enduring fragrant timbers and an essential oil that gives an aroma comparable to better known Mediterranean cedars, predominantly comprised by widdrol, cedrol, and thujopsene. In South Africa, two other ‘cedars’ are known, which are called W. nodiflora and W. schwarzii, but, until now, their chemical similarity to W. wallichii has not been investigated. Much like Widdringtonia, Callitris was once prized for its termite resistant timbers and an ‘earthy’ essential oil, but predominantly guaiol. The current study demonstrates that the essential oils were similar across all three species of Widdringtonia and two known non-volatile diterpene acids were identified in leaves: the pimaradiene sandaracopimaric acid (1) and the labdane Z-communic acid (2) with a lower yield of the E-isomer (3). Additionally, in the leaves of the three species, the structures of five new antimicrobial labdanes were assigned: 12-hydroxy-8R,17-epoxy-isocommunic acid (4), 8S-formyl-isocommunic acid (5), 8R,17-epoxy-isocommunic acid (6), 8R-17R-epoxy-E-communic acid (7), and 8R-17-epoxy-E-communic acid (8). Australian Callitris columellaris (syn. C. glaucophylla) also produced 1 and its isomer isopimaric acid, pisiferal (9), and pisiferic acid (10) from its leaves. Callitris endlicheri (Parl.) F.M.Bailey yielded isoozic acid (11) as the only major diterpene. Diterpenes 4–6, pisiferic acid (10), spathulenol, and guaiol (12) demonstrated antimicrobial and acaricidal activity.

Download Full-text