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Martins VDC, Marchesini P, Duque L, França LP, Ferreira YDS, Souza MDC, Monteiro C, Godoy RLDO, de Carvalho MG. Acaricidal activity of a 2-methoxy-clovan-9-ol rich fraction from Eugenia copacabanensis (Myrtaceae) extract on Rhipicephalus microplus (Acari: Ixodidae). Exp Parasitol 2023; 253:108604. [PMID: 37634843 DOI: 10.1016/j.exppara.2023.108604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 08/21/2023] [Accepted: 08/24/2023] [Indexed: 08/29/2023]
Abstract
Rhipicephalus microplus (Ixodidae, canestrini, 1888) is an invasive ectoparasite of cattle which causes high economic losses in emerging countries such as Brazil. Phytochemical compounds have been tested as an alternative to synthetic acaricides due to potentially lower mammalian toxicity. This study evaluated the acaricidal activity against R. microplus of the 2-methoxy-clovan-9-ol rich fraction obtained from Eugenia copacabanensis Kiaersk.leaves, a little known Myrtaceae species from the Brazilian Atlantic Forest. This fraction was obtained by maceration with methanol, partition with n-hexane and purification by normal-phase column chromatography. GC-MS, 1H and 13C NMR and IR analysis contributed to the identification of a major compound as the sesquiterpene 2-methoxy-clovan-9-ol, reported for the first time for the Myrtaceae family. The fraction was tested against R. microplus unfed larvae and engorged females and a 93% larval mortality was observed at the concentration of 50 mg mL-1. Lower concentrations of the solution tested demonstrated a significant difference in egg mass weight, hatching and control percentage. Experiments with 50.0 mg mL-1 showed significative results, with lower concentration and maximum efficacy for both assays. The IC50 values for unfed larvae and engorged females were 21.76 and 11.13 mg mL-1, respectively. These results were similar to those obtained in other studies with isolated botanical compounds and essential oils. The lower IC50 for engorged females than for unfed R. microplus larvae had also been described for other plant materials, including plants from the same Myrtaceae family. The present result suggested different mechanisms of action of the compound on the reproductive biology of engorged females, improving its effect against egg viability. These results are important for tick control, suggesting that 2-methoxy-clovan-9-ol could be a potential natural acaricidal product against both R. microplus unfed larvae and engorged females.
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Affiliation(s)
- Víctor de Carvalho Martins
- Postgraduate Program in Chemistry, Federal Rural University of Rio de Janeiro (UFRRJ), BR-465, Km 7, Seropédica, RJ, 23897-000, Brazil; Laboratory of Natural Product Chemistry, Institute of Chemistry, UFRRJ, BR-465, Km 7, Seropédica, RJ, 23897-000, Brazil; Laboratory of Liquid Chromatography, Embrapa Food Technology, Avenida das Américas, 29501, Rio de Janeiro, RJ, 23020-470, Brazil.
| | - Paula Marchesini
- Postgraduate Program in Veterinary Sciences, UFRRJ, BR-465, Km 7, Seropédica, RJ, 23897-000, Brazil
| | - Lívia Duque
- Postgraduate Program in Biological Sciences, Animal Behavior and Biology, Federal University of Juiz de Fora (UFJF), Rua José Lourenço Kelmer, s/n, Juiz de Fora, Mg, 36036-900, Brazil
| | - Liliana Princisval França
- Laboratory of Natural Product Chemistry, Institute of Chemistry, UFRRJ, BR-465, Km 7, Seropédica, RJ, 23897-000, Brazil
| | - Yasmim da Silva Ferreira
- Laboratory of Natural Product Chemistry, Institute of Chemistry, UFRRJ, BR-465, Km 7, Seropédica, RJ, 23897-000, Brazil
| | - Marcelo da Costa Souza
- RBR Herbarium, Institute of Biological and Health Sciences, UFRRJ, BR-465, Km 7, Seropédica, RJ, 23897-000, Brazil
| | - Caio Monteiro
- Department of Immunology, Microbiology, Parasitology and Pathology, Institute of Tropical Pathology and Public Health, Federal University of Goiás (UFG), Avenida, Esperança, s/n, Campus Samambaia, Goiânia, GO, 74.690-900, Brazil
| | - Ronoel Luiz de Oliveira Godoy
- Laboratory of Liquid Chromatography, Embrapa Food Technology, Avenida das Américas, 29501, Rio de Janeiro, RJ, 23020-470, Brazil
| | - Mario Geraldo de Carvalho
- Laboratory of Natural Product Chemistry, Institute of Chemistry, UFRRJ, BR-465, Km 7, Seropédica, RJ, 23897-000, Brazil
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Figueiredo A, Anholeto LA, Cola DF, Fantatto RR, Gainza YA, Dos Santos IB, Viçozzi GP, Ávila DS, Fraceto LF, Chagas ACDS. Acaricides containing zein nanoparticles: a tool for a lower impact control of the cattle tick Rhipicephalus microplus. Vet Parasitol 2023; 318:109918. [PMID: 37054578 DOI: 10.1016/j.vetpar.2023.109918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 03/27/2023] [Accepted: 03/27/2023] [Indexed: 03/30/2023]
Abstract
Nanoformulations containing zein nanoparticles (ZN) can promote the stability and protection of molecules with acaricidal activity. The present study sought to develop nanoformulations with ZN associated with cypermethrin (CYPE) + chlorpyrifos (CHLO) + a plant compound (citral, menthol or limonene), characterize them, and verify their efficacy against Rhipicephalus microplus ticks. Additionally, we aimed to assess its safety in nontarget nematodes found in soil at a site subjected to contamination by acaricides. The nanoformulations were characterized by dynamic light scattering and nanoparticle tracking analysis. Nanoformulations 1 (ZN+CYPE+CHLO+citral), 2 (ZN+CYPE+CHLO+menthol), and 3 (ZN+CYPE+CHLO+limonene) were measured for diameter, polydispersion, zeta potential, concentration, and encapsulation efficiency. Nanoformulations 1, 2, and 3 were evaluated in a range from 0.004 to 0.466 mg/mL on R. microplus larvae and caused mortality > 80% at concentrations above 0.029 mg/mL. The commercial acaricide Colosso® (CYPE 15 g + CHLO 25 g + citronellal 1 g) was evaluated also from 0.004 to 0.512 mg/mL and resulted in 71.9% larval mortality at 0.064 mg/mL. Formulations 1, 2, and 3 at 0.466 mg/mL showed acaricidal efficacy of 50.2%, 40.5%, and 60.1% on engorged females, respectively, while Colosso® at 0.512 mg/mL obtained only 39.4%. The nanoformulations exhibited long residual period of activity and lower toxicity to nontarget nematodes. ZN was able to protect the active compounds against degradation during the storage period. Thus, ZN can be an alternative for the development of new acaricidal formulations using lower concentrations of active compounds.
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Affiliation(s)
- Amanda Figueiredo
- School of Agricultural and Veterinary Sciences, São Paulo State University (UNESP), Rod. Prof. Paulo Donato Castellane, Jaboticabal SP, 14884-900, Brazil
| | - Luís Adriano Anholeto
- Brazilian Agricultural Research Corporation (EMBRAPA), Southeast Livestock Unit, Rod. Washington Luiz, Km 234 s/n, Fazenda Canchim, São Carlos, SP 13560-970, Brazil
| | - Diego Faria Cola
- Institute of Science and Technology of Sorocaba, São Paulo State University (UNESP), Av. Três de março, 511, Alto da Boa Vista, Sorocaba, SP 18087-180, Brazil
| | - Rafaela Regina Fantatto
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Rod. Araraquara-Jaú, km 1, Campos Ville, Araraquara SP, 14800-903, Brazil
| | - Yousmel Alemán Gainza
- School of Agricultural and Veterinary Sciences, São Paulo State University (UNESP), Rod. Prof. Paulo Donato Castellane, Jaboticabal SP, 14884-900, Brazil
| | - Isabella Barbosa Dos Santos
- School of Agricultural and Veterinary Sciences, São Paulo State University (UNESP), Rod. Prof. Paulo Donato Castellane, Jaboticabal SP, 14884-900, Brazil
| | - Gabriel Pedroso Viçozzi
- Laboratory of Biochemistry and Toxicology in Caenorhabditis elegans, Federal University of Pampa, BR 472, Km 592, Uruguaiana, RS 97501-970, Brazil
| | - Daiana Silva Ávila
- Laboratory of Biochemistry and Toxicology in Caenorhabditis elegans, Federal University of Pampa, BR 472, Km 592, Uruguaiana, RS 97501-970, Brazil
| | - Leonardo Fernandes Fraceto
- Institute of Science and Technology of Sorocaba, São Paulo State University (UNESP), Av. Três de março, 511, Alto da Boa Vista, Sorocaba, SP 18087-180, Brazil
| | - Ana Carolina de Souza Chagas
- Brazilian Agricultural Research Corporation (EMBRAPA), Southeast Livestock Unit, Rod. Washington Luiz, Km 234 s/n, Fazenda Canchim, São Carlos, SP 13560-970, Brazil.
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Liu Y, Shen Y, Li X, Dang Y, Li L, Yang K. Enhancing ink adhesion of specialty paper using an interpenetrating polyvinyl alcohol-blocked polyurethane polymer network sizing system. RSC Adv 2022; 12:13267-13278. [PMID: 35520121 PMCID: PMC9062711 DOI: 10.1039/d1ra08139j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Accepted: 04/25/2022] [Indexed: 11/25/2022] Open
Abstract
The printing quality and strength of specialty papers such as money, maps, newspapers and bank notes have been a significance challenge in recent years. The adhesive effect between ink and paper is depend on both the secondary binding force between the molecules and the mechanical anchoring effect of the ink on the paper. Also, the porous and fibrous structures of base paper restrain its application in printed products because of the strong capillary effect leading to the diffusion of ink particles. To address the problems involved in ink diffusion and mechanical reinforcement, surface sizing is an attractive choice from the perspective of paper handling. Herein, the surface sizing system of specialty paper with an interpenetrating polyvinyl alcohol-blocked polyurethane polymer network was applied to fabricate paper of high ink adhesive properties. In the case of the same external factors (gluing temperature, drying time, etc.), the surface sizing effect of paper samples (sizing with TBPU, polyvinyl alcohol and TBPU/PVA system) were evaluated by infrared spectroscopy, X-ray photoelectron spectroscopy, water contact angle measurements and scanning electron microscopy. Some of the pure cotton pulp paper with surface sizing treatment was treated via adhering inks to paper by spraying, smearing and soaking. The bonding strength was tested by peel-off tape tests, soaking tests, and simulated washing tests. The results showed that the water contact angle of the sized-paper increased from 67.6° to 89.7°. The mechanical properties had been greatly improved after treatment and SEM, AFM and XPS analyses indicated an increase in surface roughness and the oxygen-containing polar groups (C
Created by potrace 1.16, written by Peter Selinger 2001-2019
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O, C–OH, –NH–COO– and COOH) enhanced the fixation of ink particles on the fiber surface. These tests indicated that the novel composite system of TBPU/PVA could endow specialty paper with superb mechanical properties and more than 90% ink retention rate. All these advantages of this composite system may contribute to its wide application in the fields of papermaking and printing. The surface sizing system of specialty paper with an interpenetrating polyvinyl alcohol-blocked polyurethane polymer network was applied to fabricate paper of high ink adhesion and mechanical properties.![]()
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Affiliation(s)
- Yihe Liu
- Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology Xi'an 710021 China
| | - Yiding Shen
- Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology Xi'an 710021 China
| | - Xiaorui Li
- Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology Xi'an 710021 China
| | - Yuanyuan Dang
- Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology Xi'an 710021 China
| | - Lintao Li
- Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology Xi'an 710021 China
| | - Kai Yang
- Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology Xi'an 710021 China
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Marchesini P, Lemos ASDO, Bitencourt RDOB, Fiorotti J, Angelo IDC, Fabri RL, Costa-Júnior LM, Lopes WDZ, Bittencourt VREP, Monteiro C. Assessment of lipid profile in fat body and eggs of Rhipicephalus microplus engorged females exposed to (E)-cinnamaldehyde and α-bisabolol, potential acaricide compounds. Vet Parasitol 2021; 300:109596. [PMID: 34695723 DOI: 10.1016/j.vetpar.2021.109596] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 09/21/2021] [Accepted: 09/28/2021] [Indexed: 11/16/2022]
Abstract
In the present study, the lipid profile from the fat body and eggs of Rhipicephalus microplus was evaluated after exposure of engorged females to (E)-cinnamaldehyde and α-bisabolol, substances which have acaricide potential according to the literature. Engorged females collected from artificially infested cattle were immersed in a concentration of 10.0 mg/mL of each substance. Dissection of the female fat bodies was performed at different times (72 h and 120 h), for subsequent lipid extraction. In addition, on the fifth day of oviposition, were collected 50.0 ml50.0 mL aliquots of the egg mass of each treatment to perform the same lipid extraction procedure. To assess the lipid profiles, the samples were submitted to the thin layer chromatography (TLC) and gas chromatography-mass spectrometry (GCMS) analysis. Furthermore, an in silico analysis was performed using PASS online® software to predict the possible molecular targets of (E)-cinnamaldehyde and α-bisabolol. As result, the main lipids identified from the fat body were triacylglycerides, fatty acids, and cholesterol, whereas, triacylglycerides (TAG), fatty acids (FA), and cholesterol (CHO) and cholesterol esters (CHOE), were identified in the eggs. The results also showed a significant increase (p < 0.05) of CHO in the fat body in the group exposed to (E)-cinnamaldehyde at 72 h (0.12 μg/fat body) and 120 h (0.46 μg/fat body), in the eggs from females treated with this same substance, there was a significant reduction (p < 0.05) in the amount of CHO (0.21 μg), compared to the water control group (0.45 μg). In the GCMS technique, 5 chemical classes were found, and variations were observed between these substances, mainly hydrocarbons and steroids, in the different groups, and (E)-cinnamaldehyde promoted the greatest changes. From the predictions of the in silico study, 38 and 20 targets were selected, respectively, which are mainly related to alterations in lipid metabolism, immune system and nervous system. This study provides the first report of changes in lipid metabolism of R. microplus exposed to (E)-cinnamaldehyde and α-bisabolol, as well as presenting possible activity on the molecular targets of these substances, expanding knowledge for the potential use of these compounds in the development of botanical acaricides.
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Affiliation(s)
- Paula Marchesini
- Programa de Pós-graduação em Ciências Veterinárias da Universidade Federal Rural do Rio de Janeiro, BR-465, Km 7, Seropédica, RJ, 23897-000, Brazil.
| | - Ari Sérgio de Oliveira Lemos
- Laboratório de Produtos Naturais Bioativos, Departamento de Bioquímica, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Rua José Lourenço Kelmer, s / n, Bairro Martelos, Juiz de Fora, MG, 36036-330, Brazil
| | | | - Jéssica Fiorotti
- Programa de Pós-graduação em Ciências Veterinárias da Universidade Federal Rural do Rio de Janeiro, BR-465, Km 7, Seropédica, RJ, 23897-000, Brazil
| | - Isabele da Costa Angelo
- Programa de Pós-graduação em Ciências Veterinárias da Universidade Federal Rural do Rio de Janeiro, BR-465, Km 7, Seropédica, RJ, 23897-000, Brazil
| | - Rodrigo Luiz Fabri
- Laboratório de Produtos Naturais Bioativos, Departamento de Bioquímica, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Rua José Lourenço Kelmer, s / n, Bairro Martelos, Juiz de Fora, MG, 36036-330, Brazil
| | - Lívio Martins Costa-Júnior
- Departamento de Patologia, Universidade Federal do Maranhão, Av. dos Portugueses, 1966, Bacanga, São Luís, MA, 65080-805, Brazil
| | - Welber Daniel Zaneti Lopes
- Departamento de Biociências do Instituto de Patologia Tropical e Saúde Pública da Universidade Federal de Goiás - Avenida Esperança, s/n, Campus Samambaia, Goiânia, GO, 74.690-900, Brazil
| | | | - Caio Monteiro
- Departamento de Biociências do Instituto de Patologia Tropical e Saúde Pública da Universidade Federal de Goiás - Avenida Esperança, s/n, Campus Samambaia, Goiânia, GO, 74.690-900, Brazil
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Duque LS, Marchesini P, Monteiro C, Gomes GA, Soares Rodrigues TH, Mesquita DM, Teixeira ALC, Vale da Silva FL, Marreto LCNL, Maturano R. Acaricidal activity of the essential oils from Leptospermum scoparium, Origanum vulgare and Litsea cubeba on Rhipicephalus microplus: Influence of the solvents and search for fractions with higher bioactivity. Vet Parasitol 2021; 300:109606. [PMID: 34735845 DOI: 10.1016/j.vetpar.2021.109606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 10/15/2021] [Accepted: 10/17/2021] [Indexed: 10/20/2022]
Abstract
The use of natural products in research on tick control for Rhipicephalus microplus is increasing year by year, with promising results. In this regard, the aim of the present study was to phytochemically characterize the essential oils (EOs) of Leptospermum scoparium, Origanum vulgare and Litsea cubeba, and to evaluate the acaricidal activity of these EOs in solutions prepared using ethanol, dimethylsulfoxide (DMSO) and Tween 80 on larvae and females of R. microplus. In addition, three L. scoparium fractions were also isolated and their acaricidal activity on these larvae and adult females was tested. Gas chromatography and mass spectrometry results showed that cis-calamenene (29.82 %), carvacrol (64.85 %) and geranial (42.44 %) were the majority compounds of L. scoparium, O. vulgare and L. cubeba, respectively. Three fractions were isolated from L. scoparium: A1, rich in sesquiterpene hydrocarbons, and A2 and A3, rich in β-triketones. Bioassays on unfed larvae (immersion test) were performed using all the EOs at concentrations from 2.5 to 10.0 mg/mL; and using the three fractions obtained from L. scoparium EO at concentrations from 0.625 to 10 mg/mL. We observed 100 % mortality of larvae in all treatments with L. scoparium EO at all concentrations (diluted both in DMSO and in ethanol), and in treatments with O. vulgare EO diluted in DMSO. However, L. cubeba EO only gave rise to more than 99 % mortality at a concentration of 10 mg/mL, using the same solvents. For engorged females, the immersion test was performed at concentrations from 2.5 to 10.0 mg/mL. Percentage control greater than 90 % was observed only at the highest concentrations of L. scoparium and O. vulgare EOs diluted in DMSO and ethanol, while L. cubeba EO did not reach 90 % control in any of the treatments. In tests on L. scoparium fractions, larval mortality in the fractions rich in β-triketones (A2 and A3) was above 97 % at a concentration of 2.5 mg/mL, while in the A1 fraction, rich in sesquiterpene hydrocarbons, at the same concentration (2.5 mg/mL), mortality did not reach 22 %. In the adult immersion test, the percentage control was higher than 98 % at the lowest concentration (2.5 mg/mL) of the A1 fraction, while in the treatments with the fractions A2 and A3, the control levels were 16 and 50 %, respectively. Thus, we can conclude that the EOs of L. scoparium, O. vulgare and L. cubeba have acaricidal activity on R. microplus, as also do the fractions derived from L. scoparium EO.
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Affiliation(s)
- Lívia Senra Duque
- Programa de Pós-Graduação em Biodiversidade e Conservação da Natureza, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Minas Gerais, Brazil
| | - Paula Marchesini
- Programa de Pós-Graduação em Ciências Animal, Universidade Federal de Goiás, Goiás, Brazil
| | - Caio Monteiro
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiás, Brazil
| | - Geovany Amorim Gomes
- Centro de Ciências Exatas e Tecnologia, Universidade Estadual Vale do Acaraú, Sobral, Ceará, Brazil
| | | | - Diones Martins Mesquita
- Centro de Ciências Exatas e Tecnologia, Universidade Estadual Vale do Acaraú, Sobral, Ceará, Brazil
| | - Ana Lúcia Coutinho Teixeira
- Laboratório de Nanosistemas e Dispositivos de Entrega de Medicamentos (NanoSYS), Escola de Farmácia, Universidade Federal de Goiás, Goiás, Brazil
| | - Francisca Letícia Vale da Silva
- Laboratório de Nanosistemas e Dispositivos de Entrega de Medicamentos (NanoSYS), Escola de Farmácia, Universidade Federal de Goiás, Goiás, Brazil
| | - Laís Carneiro Naziasene Lima Marreto
- Laboratório de Nanosistemas e Dispositivos de Entrega de Medicamentos (NanoSYS), Escola de Farmácia, Universidade Federal de Goiás, Goiás, Brazil
| | - Ralph Maturano
- Programa de Pós-Graduação em Biodiversidade e Conservação da Natureza, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Minas Gerais, Brazil; Departamento de Zoologia, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Minas Gerais, Brazil.
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Vale L, de Paula LGF, Vieira MS, Alves SDGA, Junior NRDM, Gomes MDF, Teixeira WFP, Rizzo PV, Freitas FMC, Ferreira LL, Lopes WDZ, Monteiro C. Binary combinations of thymol, carvacrol and eugenol for Amblyomma sculptum control: Evaluation of in vitro synergism and effectiveness under semi-field conditions. Ticks Tick Borne Dis 2021; 12:101816. [PMID: 34555713 DOI: 10.1016/j.ttbdis.2021.101816] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Revised: 08/14/2021] [Accepted: 08/15/2021] [Indexed: 01/26/2023]
Abstract
This study aimed to investigate the in vitro acaricidal effect of thymol, carvacrol and eugenol (binary combinations) and their synergistic effect on unfed larvae and nymphs of Amblyomma sculptum, estimate the cost to prepare a formulation with these compounds, and evaluate the formulations under semi-field conditions against A. sculptum larvae. To evaluate the acaricidal effect of the compounds alone or their binary combinations (1:1 ratio) the larval packet test was performed using six concentrations (0.3125 to 10.0 mg/mL) for larvae and seven concentrations (2.5 to 20.0 mg/mL) for nymphs. The cost to produce 1 L of thymol, carvacrol and eugenol solutions, combined or alone, was estimated. In the semi-field test, formulations were sprayed on Panicum maximum plots experimentally infested with unfed A. sculptum larvae. In the in vitro tests with larvae, a synergistic effect (synergism and moderate synergism) was observed for thymol + eugenol at all concentrations tested, while thymol + carvacrol and eugenol + carvacrol showed a synergistic effect at the concentration of 5.0 mg/mL. In the in vitro tests with nymphs, thymol + eugenol, thymol + carvacrol and carvacrol + eugenol showed a synergistic effect (synergism and moderate synergism) at a concentration of 5.0 mg/mL and higher. Combining the compounds reduced the concentrations required to obtain mortality rate above 95%, resulting in lower costs. Under semi-field conditions, the treatments with thymol + eugenol and carvacrol + eugenol showed efficacies of 63.2% and 42.6%, respectively. We conclude that, depending on the concentrations, the binary combinations of thymol, carvacrol and eugenol have a synergistic acaricidal effect on unfed A. sculptum larvae and nymphs, and under semi-field conditions the associations between thymol + eugenol and carvacrol + eugenol were effective against A. sculptum larvae.
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Affiliation(s)
- Letícia Vale
- Post-graduate program in Animal Science, Federal University of Goiás (UFG). Avenida Esperança, s/n, Campus Samambaia, Goiânia, Goiás, 74.690-900 Brazil
| | - Luiza Gabriella Ferreira de Paula
- Post-graduate program in Animal Science, Federal University of Goiás (UFG). Avenida Esperança, s/n, Campus Samambaia, Goiânia, Goiás, 74.690-900 Brazil
| | - Mirna Secchis Vieira
- Post-graduate program in Animal Science, Federal University of Goiás (UFG). Avenida Esperança, s/n, Campus Samambaia, Goiânia, Goiás, 74.690-900 Brazil
| | - Susy das Graças Alecrim Alves
- Graduation in veterinary medicine in Federal University of Goiás (UFG). Avenida Esperança- s/n, Campus Samambaia, Goiânia, Goiás, 74690-900 Brazil
| | - Nélio Roberto de Moraes Junior
- Post-graduate program in Animal Science, Federal University of Goiás (UFG). Avenida Esperança, s/n, Campus Samambaia, Goiânia, Goiás, 74.690-900 Brazil
| | - Marcos Daniel Filgueiras Gomes
- Post-graduate program in Animal Science, Federal University of Goiás (UFG). Avenida Esperança, s/n, Campus Samambaia, Goiânia, Goiás, 74.690-900 Brazil
| | - Weslen Fabrício Pires Teixeira
- Post-graduate program in Animal Science, Federal University of Goiás (UFG). Avenida Esperança, s/n, Campus Samambaia, Goiânia, Goiás, 74.690-900 Brazil
| | - Pricila Vetrano Rizzo
- Núcleo de Apoio à Transferência de Tecnologia da Embrapa Gado de Leite no Centro-Oeste - Embrapa Arroz e Feijão - Rodovia GO 462, Km 12, Zona Rural - Santo Antônio de Goiás - GO - CEP: 75.375-000
| | - Fernanda Mara Cunha Freitas
- Núcleo de Apoio à Transferência de Tecnologia da Embrapa Gado de Leite no Centro-Oeste - Embrapa Arroz e Feijão - Rodovia GO 462, Km 12, Zona Rural - Santo Antônio de Goiás - GO - CEP: 75.375-000
| | - Lorena Lopes Ferreira
- Veterinary School, Federal University of Minas Gerais (UFMG). Avenida Presidente Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, Minas Gerais, 31270-901 Brazil
| | - Welber Daniel Zanetti Lopes
- Post-graduate program in Animal Science, Federal University of Goiás (UFG). Avenida Esperança, s/n, Campus Samambaia, Goiânia, Goiás, 74.690-900 Brazil; Institute of Tropical Pathology and Public Health, Federal University of Goiás (UFG). Rua 235, s/n, Setor Universitário, Goiânia, Goiás, 74605-050 Brazil
| | - Caio Monteiro
- Post-graduate program in Animal Science, Federal University of Goiás (UFG). Avenida Esperança, s/n, Campus Samambaia, Goiânia, Goiás, 74.690-900 Brazil; Institute of Tropical Pathology and Public Health, Federal University of Goiás (UFG). Rua 235, s/n, Setor Universitário, Goiânia, Goiás, 74605-050 Brazil.
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Nyahangare ET, Mvumi BM, McGaw LJ, Eloff JN. Addition of a surfactant to water increases the acaricidal activity of extracts of some plant species used to control ticks by Zimbabwean smallholder farmers. BMC Vet Res 2019; 15:404. [PMID: 31706312 PMCID: PMC6842498 DOI: 10.1186/s12917-019-2078-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 09/05/2019] [Indexed: 11/23/2022] Open
Abstract
Background Many studies have revealed that bioactive compounds for different indications are not extracted from plants with water, the only extractant practically available to rural communities. We compared the acaricidal activity of acetone extracts of 13 species used traditionally to protect cattle against ticks. We also investigated if the extraction of biologically active compounds against Rhipicephalus (Boophilus) decoloratus ticks could be enhanced by adding a liquid soap that is locally available to smallholder farmers. Methods A total of 13 plant species selected based on reported traditional use in Zimbabwe, were dried and finely ground before extraction with water, or water plus a surfactant, or acetone. The adapted Shaw Larval Immersion Test (SLIT) method was used to determine the activity of acetone and crude water extracts with or without liquid soap against the tick larvae. The activity of four fractions of crude acetone extracts (extracted using solvents of different polarity), of the most active plant species, Maerua edulis (tuber and leaf) was also compared to identify the most active fraction. Results Aqueous plant extracts were not toxic to ticks, but the addition of 1% liquid soap as a surfactant increased mortality of the R. (B) decoloratus larvae significantly. With the Maerua edulis tuber extract, the efficacy of the 1% liquid soap was comparable to that of the amitraz based commercial synthetic acaricide. The use of acetone as an extractant, also increased the mortality of the tick larvae in all the plant species. With M. edulis (tuber and leaf), Monadenium lugardae and Kleinia sp. acetone extracts, the activity was comparable to that of the positive control (a commercially available amitraz-based synthetic acaricide). The non-polar fractions of the acetone extract of leaf and tuber of M. edulis caused up to 100% mortality. This indicates that non-polar to intermediate polarity compounds are responsible for the acaricidal activity. Conclusion Organic solvents such as acetone extracted active compounds but water did not. By adding commonly available dishwashing soap to water active compounds were extracted leading to a high acaricidal activity of the plant extracts. In some cases, it was as active as non-polar extracts and a synthetic commercial acaricide (positive control). This approach makes it possible for the smallholder farmers and traditional healers to extract biologically active compounds from plants by using water.
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Affiliation(s)
- Emmanuel T Nyahangare
- Department of Animal Science, Faculty of Agriculture, University of Zimbabwe, P O Box MP167, Mt Pleasant, Harare, Zimbabwe.,Phytomedicine Programme, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, Pretoria, 0110, South Africa
| | - Brighton M Mvumi
- Department of Soil Science & Agricultural Engineering, Faculty of Agriculture, University of Zimbabwe, P O Box MP167, Mt Pleasant, Harare, Zimbabwe
| | - Lyndy J McGaw
- Phytomedicine Programme, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, Pretoria, 0110, South Africa
| | - Jacobus N Eloff
- Phytomedicine Programme, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, Pretoria, 0110, South Africa.
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Anholeto LA, Oliveira PRD, Rodrigues RAF, Spindola CDS, Labruna MB, Pizano MA, Castro KNDC, Camargo-Mathias MI. Potential action of extract of Acmella oleracea (L.) R.K. Jansen to control Amblyomma cajennense (Fabricius, 1787) (Acari: Ixodidae) ticks. Ticks Tick Borne Dis 2017; 8:65-72. [DOI: 10.1016/j.ttbdis.2016.09.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Revised: 08/23/2016] [Accepted: 09/29/2016] [Indexed: 10/20/2022]
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Cruz PB, Barbosa AF, Zeringóta V, Melo D, Novato T, Fidelis QC, Fabri RL, de Carvalho MG, Oliveira Sabaa-Srur AU, Daemon E, Monteiro CMO. Acaricidal activity of methanol extract of Acmella oleracea L. (Asteraceae) and spilanthol on Rhipicephalus microplus (Acari: Ixodidae) and Dermacentor nitens (Acari: Ixodidae). Vet Parasitol 2016; 228:137-143. [DOI: 10.1016/j.vetpar.2016.08.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 08/23/2016] [Accepted: 08/31/2016] [Indexed: 12/20/2022]
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Acute Oral Mammalian Toxicity and Effect of Solvents on Efficacy of Maerua edulis (Gilg. & Ben.) De Wolf against Rhipicephalus (Boophilus) decoloratus Koch, 1844 (Acarina: Ixodidae), Tick Larvae. BIOMED RESEARCH INTERNATIONAL 2016; 2016:7078029. [PMID: 27660762 PMCID: PMC5021860 DOI: 10.1155/2016/7078029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 07/06/2016] [Accepted: 07/21/2016] [Indexed: 11/18/2022]
Abstract
Efficacy and toxicity of aqueous and organic solvents extracts of Maerua edulis against ticks and mice, respectively, were determined. Ground leaves were extracted separately using cold water, cold water plus surfactant (1% v/v liquid soap), hot water plus surfactant, hexane, or methanol to make 25% w/v stock solutions from which serial dilutions of 5, 10, 20, and 25% were made. For each concentration, 20 Rhipicephalus decoloratus tick larvae were put in filter papers impregnated with extracts and incubated for 48 h at 27°C and 85-90% RH for mortality observation after 24 h and 48 h. In the toxicity experiment, hot water plus surfactant treatments of 5, 10, 20, and 25% (w/v) M. edulis were administered in suspension per os to sexually mature Balb/C mice and observed for clinical signs and mortality for 72 h. Larvae mortality was highest (>98%) in methanol-extracted M. edulis treatments (20 and 25%), which was not different from the amitraz-based control (Tickbuster®). Mortality was also higher in the hot water than in cold water plus surfactant treatments (P < 0.05). No postadministration adverse health effects were observed in the mice. These results suggest that M. edulis is an effective tick remedy best extracted using methanol or hot water plus surfactant.
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Evaluation of the combined effect of thymol, carvacrol and ( E )-cinnamaldehyde on Amblyomma sculptum (Acari: Ixodidae) and Dermacentor nitens (Acari: Ixodidae) larvae. Vet Parasitol 2015; 212:331-5. [DOI: 10.1016/j.vetpar.2015.08.021] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Revised: 08/12/2015] [Accepted: 08/19/2015] [Indexed: 11/18/2022]
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de Oliveira Souza Senra T, Zeringóta V, de Oliveira Monteiro CM, Calmon F, Maturano R, Gomes GA, Faza A, de Carvalho MG, Daemon E. Assessment of the acaricidal activity of carvacrol, (E)-cinnamaldehyde, trans-anethole, and linalool on larvae of Rhipicephalus microplus and Dermacentor nitens (Acari: Ixodidae). Parasitol Res 2013; 112:1461-6. [DOI: 10.1007/s00436-013-3289-3] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Accepted: 01/09/2013] [Indexed: 10/27/2022]
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