Evaluation of essential oils as an ecological alternative in the search for control Rhipicephalus microplus (Acari: Ixodidae)

Author(s):  
Rafaelle Vinturelle ◽  
Camila Mattos ◽  
Jéssica Meloni ◽  
Helen D. Lamberti ◽  
Jeane Nogueira ◽  
...  
2020 ◽  
Vol 9 (10) ◽  
pp. e5049108788
Author(s):  
Luciane Neris Cazella ◽  
Herika Line de Marko de Oliveira ◽  
Wanessa de Campos Bortolucci ◽  
Isabelle Luiz Rahal ◽  
Irinéia Paulina Baretta ◽  
...  

Baccharis dracunculifolia, native to Brazil and the main source of “green propolis”, has been reported with several biological activities, and may be a source of bovine tick control substituting synthetic acaricides. Objective: to evaluate the in vitro and ex situ acaricidal activity of B. dracunculifolia leaf and flower essential oils against Rhipicephalus microplus. Methodology: the essential oils were extracted by hydrodistillation and analyzed by a gas chromatography coupled to mass spectrometry; the acaricidal activity of the essential oil was evaluated in vitro against adult females and against the egg hatchability; moreover, the acaricidal activity against tick larvae was evaluated in vitro and ex situ. Results: the major class of the essential oils was oxygenated sesquiterpene (55.1% leaves 50.4% flowers) and the main compounds were (21.5% leaves; 20.6% flowers) and spathulenol (21.8% leaves; 20.3% flowers). The essential oil at 500 mg/mL was effective to control egg hatchability with a reduction of egg laying capacity and decrease of number of adult ticks and larvae. The larvicidal activity of the essential oil had LC99.9 from 35 to 37 mg/mL by probit analysis, and the essential oil from 11 to 14 mg/mL presented 85 to 95% of treatment efficiency in the ex situ test. Conclusion: B. dracunculifolia leaf and flower essential oils are stable and have application potential to control bovine ticks.


2020 ◽  
Vol 32 (4) ◽  
pp. 316-322
Author(s):  
Erlânio Oliveira De Sousa ◽  
Aldilene Da Silva Lima ◽  
Suzana Gomes Lopes ◽  
Lívio Martins Costa-Junior ◽  
José Galberto Martins Da Costa

2019 ◽  
Vol 31 (4) ◽  
pp. 297-304 ◽  
Author(s):  
Karina Neoob De Carvalho Castro ◽  
Lívio Martins Costa-Júnior ◽  
David Fernandes Lima ◽  
Kirley Marques Canuto ◽  
Edy Sousa De Brito ◽  
...  

2021 ◽  
pp. 109584
Author(s):  
Tatiane Aranha da Penha ◽  
Anderson Cássio Campelo Costa ◽  
Aldilene da Silva Lima ◽  
Maria Izabel Camargo-Mathias ◽  
Arie Fitzgerald Blank ◽  
...  

2016 ◽  
Vol 7 (6) ◽  
pp. 1029-1034 ◽  
Author(s):  
Rafael Pazinato ◽  
Andréia Volpato ◽  
Matheus D. Baldissera ◽  
Roberto C.V. Santos ◽  
Dilmar Baretta ◽  
...  

Author(s):  
Paula Marchesini ◽  
Débora Ramos de Oliveira ◽  
Geovany Amorim Gomes ◽  
Tigressa Helena Soares Rodrigues ◽  
Ralph Maturano ◽  
...  

Abstract This study aimed to chemically characterize the essential oils (EOs) of Cinnamomum zeylanicum (cinnamon) and Eremanthus erythropappus (candeia) and evaluate their acaricidal activity, together with that of their major compounds and cinnamyl acetate derivative, against Rhipicephalus microplus. Essential oil compounds were identified through gas chromatography. The larval packet test (LPT) at concentrations ranging from 0.31 to 10.0 mg/mL and the adult immersion test (AIT) at concentrations between 2.5 and 60.0 mg/mL were performed. (E)-cinnamaldehyde and α-bisabolol were the major compounds in cinnamon (86.93%) and candeia (78.41%) EOs, respectively. In the LPT, the EOs of cinnamon and candeia and the compounds (E)-cinnamaldehyde, α-bisabolol and cinnamyl acetate resulted in 100% mortality at concentrations of 2.5, 2.5, 5.0, 10.0 and 10.0 mg/mL respectively. In the AIT, percentage control values > 95% were observed for cinnamon and candeia EOs, (E)-cinnamaldehyde and α-bisabolol at the concentrations of 5.0, 60.0, 20.0, and 20.0 mg/mL, respectively, whereas cinnamyl acetate showed low activity. We conclude that EOs and their compounds showed high acaricidal activity, whereas the acetylated derivative of (E)-cinnamaldehyde presented less acaricidal activity on R. microplus engorged females.


2022 ◽  
Vol 9 (1) ◽  
pp. 23
Author(s):  
Lucía Guzmán ◽  
Jorge Luis Malla ◽  
Jorge Ramírez ◽  
Gianluca Gilardoni ◽  
James Calva ◽  
...  

Control measures against common cattle tick Rhipicephalus microplus are of the upmost importance because of considerable, deleterious impact on a farm’s economy. Due to resistance phenomena to synthetic acaricides being a constraint in affected farms, the search for plant derivatives as acaricides has increased dramatically in recent years. In this work, essential oils obtained from two Ecuadorian plants, Ambrosia peruviana and Lepechinia mutica (EOAp, EOLm), traditionally used as insecticides in indigenous communities, were studied on larvae and engorged females at the parasitic stages of R. microplus. Larvae and females were treated with five (0.0625, 0.125, 0.25, 0.50 and 1%) and six concentrations (0.125, 0.25, 0.50, 1, 2 and 4%), respectively, of each EOsAp/Lm. A 98–99% larval mortality was achieved with 0.5% of both EOsAp/Lm. EOAp inhibited oviposition and egg hatching up to 82% and 80%, respectively, and had an overall efficacy of 93.12%. Efficacy of EOLm was 72.84%, due to the low influence of EOLm on reproductive parameters. By steam distillation and GC-MS analysis, γ-Curcumene was identified as the main constituent (52.02%) in the EOAp and Shyobunol (10.80%) in EOLm. The results suggest that major components of both essential oils should be further studied as promissory acaricides against R. microplus.


Author(s):  
Everton Gomes Guimarães dos Santos ◽  
Wallyson André dos Santos Bezerra ◽  
Kevin B. Temeyer ◽  
Adalberto A. Pérez de León ◽  
Livio Martins Costa-Junior ◽  
...  

Abstract This study reports the action of essential oils (EO) from five plants on the activity of native and recombinant acetylcholinesterases (AChE) from Rhipicephalus microplus. Enzyme activity of native susceptible AChE extract (S.AChE), native resistant AChE extract (R.AChE), and recombinant enzyme (rBmAChE1) was determined. An acetylcholinesterase inhibition test was used to verify the effect of the EO on enzyme activity. EO from Eucalyptus globulus, Citrus aurantifolia, Citrus aurantium var.dulcis inhibited the activity of S.AChE and R.AChE. Oils from the two Citrus species inhibited S.AChE and R.AChE in a similar way while showing greater inhibition on R.AChE. The oil from E. globulus inhibited native AChE, but no difference was observed between the S.AChE and R.AChE; however, 71% inhibition for the rBmAChE1 was recorded. Mentha piperita oil also inhibited S.AChE and R.AChE, but there was significant inhibition at the highest concentration tested. Cymbopogon winterianus oil did not inhibit AChE. Further studies are warranted with the oils from the two Citrus species that inhibited R.AChE because of the problem with R. microplus resistant to organophosphates, which target AChE. C. winterianus oil can be used against R. microplus populations that are resistant to organophosphates because its acaricidal properties act by mechanism(s) other than AChE inhibition.


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