Acaricidal activity of ethanolic extract from aerial parts of Tagetes patula L. (Asteraceae) against larvae and engorged adult females of Rhipicephalus sanguineus (Latreille, 1806)
© Politi et al.; licensee BioMed Central Ltd. 2012
Received: 26 October 2012
Accepted: 4 December 2012
Published: 17 December 2012
The tick Rhipicephalus sanguineus is the species with the largest worldwide distribution and is proven to be involved in the transmission of pathogens such as Babesia canis, Ehrlichia canis, Coxiella burnetii, Rickettsia ricketsii, Rickettsia conorii, among others. Studies have demonstrated acquisition of resistance to some of the active principles used in commercial formulations of acaricides. Tagetes patula (Asteraceae) is a plant with highlighted economic and commercial importance due to the production of secondary metabolites with insecticide and acaricide potential, mainly flavonoids, thiophenes and terpenes.
The in vitro acaricide action of the ethanolic 70% extract from aerial parts of T. patula, obtained by percolation, was evaluated against larvae and engorged adult females of Rhipicephalus sanguineus by immersion test for 5 minutes. The chemical characterization of this extract was done by liquid chromatography coupled with mass spectrometry (LC-MS), using direct injection of sample.
Despite T. patula not proving lethal to adults in any of the concentrations tested, at 50.0 mg/mL oviposition rate decreased by 21.5% and eliminated 99.78% of the larvae. Also it was determined that the best results were obtained with 5 minutes of immersion. From the chromatographic analysis twelve O-glycosylated flavonoids were identified.
This is the first report on the acaricidal activity of T. patula extract against Rh. sanguineus. If we consider the application of the product in the environment, we could completely eliminate the larval stage of development of the ixodid Rh. sanguineus.
The intense agricultural activity, the interaction of man and domestic animals and the recent background of climate change in the world favor the spread of infectious agents transmitted by ticks, leading to the emergence and resurgence of different etiologic agents.
The subclass Acari, class Arachnida, which belongs to ticks and other mites, is a very heterogeneous group presenting great diversity of habits and habitats. Ticks are inserted in the order Ixodida, which can be divided into three families: Argasidae, Ixodidae and Nuttalliellidae. The tick Rhipicephalus sanguineus (Latreille, 1806) is the species currently with the most worldwide spread, due the wide distribution of its natural host, the dog, and also due to nidicolous habits. It is related to the transmission of pathogenic agents, mainly Babesia canis and Ehrlichia canis[4–6]. The parasite can also transmit several Rickettsia species to man, such as Rickettsia rickettsii and R. conorii, the causative agents, respectively, of Rocky Mountain spotted fever in Mexico and South America, and Botonous Fever in the Mediterranean region of Southern Europe and Northern Africa. Fipronil, amitraz, carbaryl and pyrethroids (deltamethrin, permethrin and cypermethrin) are the acaricides most employed for its control[8–13], however, some authors have reported resistance of ticks to commercial formulations containing these compounds. The use exclusive of synthetic products is becoming less viable in practical and economic terms, since its indiscriminate use causes environmental pollution, toxicity to humans and the appearance of chemical residues in products of animal origin. When thinking about the control of Rh. sanguineus ticks, it must be considered that only 5% are found on dogs and the other 95% are free in the environment. Therefore, its effective elimination will require an integrated control strategy, aimed at both the canine population and the environment[16, 17].
Plant extracts can be used to control certain species of ticks such as Hyalomma anatolicum excavatum, Amblyomma americanum, Dermacentor variabilis and even Rh. sanguineus[20–23]. Among the advantages of phytotherapics that currently justify their use are the synergistic effects of its compounds, the combination of mechanisms for substances acting on different molecular targets, the lowest risk of side effects and lower costs in research.
Tagetes patula L. (Asteraceae), popularly known as dwarf marigold or French marigold, is an annual plant with 20–30 cm height, native to North America and widely disseminated worldwide. Its flowers have varied coloration, and may present yellow petals, orange or a mix of these two shades. Is easily cultured and propagated, producing flowers and seeds throughout the year, with high germination rates. The phytochemical investigation of different parts of T. patula has resulted in the isolation of the chemical constituents of several classes of secondary metabolites, such as flavonoids, benzofurans, carotenoids and thiophenes, the latter being responsible for a variety of biocidal effects. Bano et al., from different parts of T. patula (roots, leaves and flowers) isolated and characterized by spectroscopic methods, several thiophenes, steroids and terpenoids: 5′- hydroxymethyl-5-(3-butene-1-ynil)-2,2′-bithiophene; methyl-5-[4-(3- methyl-1- oxobutoxy)-1-butynyl]-2,2’ bithiophene; cholesterol; β-sitosterol (24-R-stigmast-5-ene-3β-ol) (4); stigmasterol [24-(S)-stigmast-5,22E-dien-3β-ol] and lupeol. Flavonoids, such as kaempferol and quercetina, were reported by Ivancheva and Zdravkova. Tarpo[29–31] and Bhardwaj et al., recorded the presence of patuletin-7-O-glucoside (patulitrin), patuletin, quercetagetin, quercetagetin-7-O-glucoside and luteolin in petals of T. patula.
This study aimed to perform the chemical characterization by high pressure liquid chromatography coupled to mass spectrometry (HPLC-MS) of the 70% ethanolic extract from aerial parts of T. patula and test the acaricidal action in larvae and engorged adult females of Rh. sanguineus through immersion tests for 5 minutes.
Aerial parts of Tagetes patula (stems, leaves and flowers) were obtained through an agreement signed with the Collection of Medicinal and Aromatic Plants (CPMA) of the Multidisciplinary Center for Chemical, Biological and Agricultural Research (CPQBA), Universidade Estadual de Campinas (UNICAMP). The planting was done in a total area of 100 m2, from seeds of Top Seed Garden line (Agristar®). The harvesting occurred in June 2010. A voucher specimen was deposited under number 1421 in the CPQBA Herbarium.
After the stabilization and drying, the aerial parts of the plant were triturated into cutting mill. The powdered drug was used for preparing the extract by percolation using ethanol 70% (v/v) as the extractor liquid, with average flow rate of 40 drops/minute. After complete evaporation of the solvent, this extract was lyophilized and stored in a desiccator to avoid incorporating humidity and/or contamination.
For the chemical characterization by liquid chromatography coupled to mass spectrometry, the extract was solubilized in MeOH (Baker®, HPLC grade) to give a solution 1.0 mg/ml, which was filtered in expanded polytetrafluoroethylene membrane (PTFE) with pores of 0.45 μm. The final solution was introduced directly into the ESI source using a glass syringe boosted by a pumping system with outflow of 20.0 mL/min.
The solution used in the Adult Immersion Test (AIT) and Larval Immersion Test (LIT) was prepared using Triton-X-100 1.25% (v/v), because ethanol proved toxic in preliminary tests. Serial dilution was prepared so as to obtain test solutions 12.5, 25.0, 50.0 and 100.0 mg/mL.
Collection of ticks
Engorged adult females of Rh. sanguineus were obtained from the colony of the Brazilian Centre of Studies on Tick Morphology (BCSTM), Universidade Estadual Paulista "Julio de Mesquita Filho" (UNESP), Instituto de Biociências (IB), Rio Claro (SP), maintained under controlled conditions (27–28°C, 70-80% RH, 12/12 h photoperiod) in BOD incubator (Eletrolab EL 202/3). These ticks were fed in fabric chambers on the dorsum of New Zealand white rabbits (Oryctolagus cuniculis) [approved by the ethics committee on the use of animal (CEUA), IB-UNESP, protocol number 026/2011], according to the procedure described by Bechara et al..
The mass spectra of the ethanolic 70% extract of aerial parts of T. patula were obtained on a HPLC coupled to a mass spectrometer LCQ Fleet (Thermo Scientific®), equipped with a dispositive of direct insertion of the sample via flow injection analysis (FIA). The studied matrix was analyzed by electrospray ionization (ESI) and the fragmentation in multiple stages (MS2, MS3, MSn) was performed at an ion trap (IT) interface. The negative mode was selected for the generation and analysis of the mass spectra for the first order (MS), and for the remaining experiments in multiple stages (MSn) under the following conditions: capillary voltage −25 V, voltage spray −5 kV, capillary temperature 275°C, carrier gas nitrogen (N2) with a flow of 8 arbitrary units (A.U.), collision gas helium (He). The track acquisition was 100–2000 m/z. The software Xcalibur version 1.3 (Thermo Finigan®) was used to acquire and process data.
Adult Immersion Test (AIT)
Groups of 10 Rhipicephalus sanguineus engorged females, chosen randomly, were immersed for 5 minutes in Petri dishes (5.5 cm diameter, 1.5 cm high) containing 10.0 mL of the respective dilutions of 70% ethanolic extract from aerial parts of T. patula (APEtOH70%): 12.5, 25.0, 50.0 and 100.0 mg/mL, using a solution of Triton X-100 1.25% (v/v) as negative control. The ticks were removed from solution, dried on paper towels and gently allocated individually in sterile 24-well plates, incubated at 27–28°C and 70-80% RH (12/12 h photoperiod) in a BOD incubator. After two weeks it was determined the number of females laying eggs. The eggs were collected, weighed and then placed in glass tubes, which were incubated under the same conditions described above.
Where: ER = reproductive efficiency; = EP product efficiency; * = number of larvae at approximately 1.0 g of eggs (number experimentally obtained).
Kinetics of action of the extract APEtOH70% in the adult immersion test
In order to determine the correspondence of the exposure time of ticks in the test solution with the results obtained, the Adult Immersion Test with engorged females in 70% ethanolic extract from aerial parts of T. patula (50.0 mg/ml) for 5, 10, 30 and 60 minutes was used. The test conditions were identical to those described above for t = 5 minutes. Results represent the average of two assays, with groups containing five ticks each.
Larval Immersion Test (LIT)
All statistical analyses were performed with StatPlus 2009 software (Soft Analyst®). Results in Adult Immersion Test (mortality, egg laying inhibition, percentage of hatching, product efficiency, among other parameters) were analyzed by Sheffé, Tukey-Kramer and Neuman-Keuls tests (significance level: p < 0.05). Lethal concentrations (LC) to kill 50% and 99% of larvae and their respective 95% confidence intervals (CI) were calculated by probit analysis.
List of the phenolic compounds identified in Tagetes patula by LC/ESI-IT-MS
Product ion scan fragments of [M-H]-
Quercetin-3-O-glucoside (isoquercitrin) or Quercetina-3-O-galactoside (hyperoside)
Patuletin-7-O-glucoside (patulitrin) or 6-O-methyl-quercetin-3-O-glucoside
Peak 1 showed the signal of a deprotonated molecule [MH]- in m/z 285. The fragmentation of second order was not stable, however, from the analysis of the fragments presented in full scan spectra (MS2), the retro-Diels-Alder reaction (RDA) could be observed, with pattern of fragmentation of ions at m/z 151 and at m/z 134, suggesting that this substance is kaempferol.
Peak 2 showed the signal of a deprotonated molecule [MH]- at m/z 331. The second order fragmentation of precursor ion of m/z 331 generated the ion product m/z 316 [M-CH3-H]-. These data, together with literature references, allowed identification of the compound as patuletin.
Peak 3 exhibited the signal of a deprotonated molecule [MH]- at m/z 433. The second order fragmentation generated the ion product m/z 316 [M-H-132]-, corresponding to loss of one pentose unit, suggesting it was quercetin-3-O-pentoside, compatible with quercetin-3-O-xylose isolated in T. maxima.
Peak 4 presented the signal of a deprotonated molecule [MH]- at m/z 463. The second order fragmentation generated the ion product m/z 301 [M-H-162]-, corresponding to loss of one hexose unit, suggesting it was quercetin-3-O-glucoside (isoquercitrin) or quercetin-3-O-galactoside (hyperoside).
Peak 5 exhibited the signal of a deprotonated molecule [MH]- at m/z 493. The second order fragmentation generated the signal m/z 331 [M-H-162]- and the signal of m/z 316 [M-CH3-H]-, suggesting, according to data from the literature, that the compound could be patuletin-7-O-glucoside (patulitrin) or 6-O-methyl-quercetin-3-O-glucoside.
Peak 6 signal showed the signal of a deprotonated molecule [MH]- at m/z 579. The second order fragmentation with precursor ion at m/z 579 generated the signal of m/z 447 [M-H-132]-, attributed to the loss of a xylose unit. Fragmentation of the ion at m/z 447 generated the signal m/z 301 [M-H-146]-, corresponding to loss of one deoxyhexose unit (e.g. rhamnnose). Considering the sequence the loss of sugars led to the proposal that the structure was of quercetin-3-O-rhamnosyl-O-xyloside for this substance.
Peak 7 exhibited the signal of a deprotonated molecule [MH]- at m/z 593. The second order fragmentation generated the signals m/z 447 [M-H-146]- and m/z 301 [M-H-146]-, corresponding to the loss of two deoxyhexose units in sequence, suggesting it was quercetin-3-O-di-rhamnoside.
Peak 8 showed the signal of a deprotonated molecule [MH]- at m/z 609. The second order fragmentation generated three possibilities: signals m/z 447 [M-H-162]- and m/z 301 [M-H-146]-, corresponding to successive loss of a hexose unit and a deoxyhexose unit, suggesting it was quercetin-3-O-glycosyl-7-O-ramnosyl; signals m/z 463 [M-H-146]- and m/z 301 [M-H-162]-, corresponding to successive loss of a deoxyhexose unit and a hexose unit, suggesting it could be quercetin-3-O-ramnosyl-7-O-glucosyl and signals at m/z 447 [M-H-162]- and m/z 285 [M-142-H]-, corresponding to successive loss of two hexose units, suggesting it could be kaempferol-3-O-di-hexoside.
Peak 9 exhibited the signal of a deprotonated molecule [MH]- at m/z 615. The second order fragmentation generated signals m/z 463 [M-H-152]- and m/z 301 [M-H-162]-, corresponding to sequential loss of one galloyl unit and one hexose unit, suggesting it could be quercetin-3-O-hexoside-galloyl.
Peak 10 showed the signal of a deprotonated molecule [MH]- at m/z 729. The second order fragmentation generated signals at m/z 583 [M-H-146]- and m/z 431 [M-H-152]-, relating to sequential losses of one rhamnose unit and one galloyl unit. These data suggest that the compound may be kaempferol-3-O-rhamnoside-galloyl.
Index of egg laying and percentage of egg laying inhibition in females of Rhipicephalus sanguineus
Weight of the Ticks (g)
Weight of the Eggs (g)
Egg Laying Inhibition (%)
Table2 reveals that there was an increased percentage inhibition of egg laying at the lowest concentrations (12.5 and 25.0 mg/ml) until 50.0 mg/mL, from which the increase of concentration resulted in decreased activity to about half, showing a mathematical pattern expressed by the following equation: y = − 0.006x2 + 0.787x - 2.663 (R2 = 0.964), where y = percentage of inhibition of egg laying and x = concentration of test sample. There were no statistically significant differences between the weight of the animals and their egg weights, avoiding bias in the results.
Values of reproductive efficiency and product efficiency of 70% ethanolic extract from Tagetes patula
Larval mortality rate of Rhipicephalus sanguineus front dilutions of 70% ethanolic extract of Tagetes patula
Number of living larvae
Number of death larvae
Lethal concentrations of 70% ethanolic extract of Tagetes patula in larvae of Rhipicephalus sanguineus
Level of 95% of significance
(0.29 – 0.77)
(1.57 – 2.24)
(3.34 – 4.12)
(7.42 – 7.68)
(32.45 – 37.39)
(49.35 – 55.19)
(108.19 – 123.67)
The use of natural products in the control of brown dog tick Rh. sanguineus has been the focus of research in many countries, especially with the increased resistance that these organisms present to commercial acaricides. The main mechanisms used by resistant ticks to survive against acaricides are: reduction of the penetration rate of the product by changing the outer tegument; changes in metabolism, storage and excretion of the acaricide and changes of the site of action of chemical products. In Brazil, studies that use plant extracts or essential oils against these ticks have been increasingly recurrent, some of them showing promising results.
The coupling of liquid chromatography and mass spectrometry is often used to characterize the chemical constituents of plant extracts. The mass spectrometer is considered as a universal detector, and thus the union brings a time saving element in the analysis of a complex matrix, because it avoids the isolation of its chemical constituents. Besides the chromatographic separation and the information on the molecular weight of substances, fragments of the molecules in question are also obtained, which are important for the structural elucidation of different classes of secondary metabolites. Due to the high sensitivity, this system can detect minor compounds that have been isolated by standard phytochemical techniques. The second order fragmentation (MS/MS) for each of the most representative ions led to the identification of O-glycosylated flavonoids. In this type of flavonoid the O-C bond is more susceptible to cleavage. The break and concomitant rearrangement of the hydroxyl hydrogen, leads to removal of monosaccharides, with losses of 176 mass units (uronic acid), 162 mass units (hexose), 146 mass units (deoxyhexose) or 132 mass units (pentose), allowing determination of the sequence of carbohydrates present in the aglycones. In this work, when compared to positives, the negative mode led to results more elucidative to obtain the chemical composition of the extract of T. patula. Thus, although the positive mode has been evaluated, only the results in negative mode were presented, giving a total of 12 possible compounds in the constitution of the 70% ethanolic extract of the aerial parts from T. patula. These substances are in agreement with records from the literature, which describe the presence of phenolic compounds in various species of Tagetes[41–43, 50–52].
In this study, the immersion test of engorged adult Rh. sanguineus showed no significant rates of death, occurring only in a few isolated cases in the replicates of each test. The most effective concentration tested was 50.0 mg/mL, showing a percentage of inhibition of egg laying of 21.50%. No previous reports testing natural plant extractives against engorged adult females of Rh. sanguineus were found in the literature, precluding comparison with the results presented in this study, making it the pioneer. In a study with Riphicephalus (Boophilus) microplus, Ribeiro et al. found as best result of percentage of egg laying inhibition the value of 19.2% for hexane extract of Hypericum polyanthemum (Guttiferae) (25.0 mg/mL). In another investigation, Ribeiro et al. found values of percentage of egg laying inhibition of R. (Bophilus) microplus ranging between 11.7% and 14.6%, using hexane extract of Calea serrata (Asteraceae).
The efficacy of the extracts was determined according to estimated reproduction calculation proposed by Drummond et al.. The reproductive rate is influenced by several factors, the main ones being the temperature and relative humidity. In in vitro experiments these factors are controlled, which means that the results obtained are only due to the treatments. The analysis of variance (ANOVA) shows that the values of PE showed no statistically significant differences between groups. Furthermore, the results presented in Table2 revealed a pattern of action of samples. It was found that there is similarity in the percentage of egg hatchability and in the product efficiency between extreme dilutions (12.5 mg/mL and 100.0 mg/mL) and between the intermediate dilutions (25.0/mL and 50.0 mg/mL). Thus, it can be suggested that the efficiency in the inhibition of posture and/or hatching of the eggs is dose-dependent, i.e., from an optimal concentration, the inhibition rates tend to decay relatively. Overall, the 70% ethanolic extract of the aerial parts of T. patula (APEtOH70%) to 50.0 mg/mL was the most efficient, with a value of PE = 42.45%. Broglio-Micheletti et al. obtained values of product efficiency ranging between 18.35% to 2% ethanolic fraction of leaves of Cymbopogon citratus (Poaceae) and 59.24% to 2% ethanolic fraction of flowers of Syzygium malaccensis (Myrtaceae).
When the exposure time of the ticks in the solutions tested was varied, statistically significant differences between the minimum and maximum were found. Interestingly, the percentage of egg laying inhibition of the group immersed for 5 minutes was almost twice that found in the group immersed for 60 minutes (21.5% and 10.82%, respectively). Further study of the mechanism of action of the extract APEtOH70% should be conducted to explain this finding, however, it can be suggested that 5 minutes is sufficient to obtain the results reported here and increments in the immersion time does not enhance its effectiveness.
Larval immersion tests showed very promising results. The 70% ethanolic extract of aerial parts of T. patula at 50.0 mg/mL and 100.0 mg/mL had mortality rates close 100%. Even at the lowest concentration (12.5 mg/mL), the extract showed mortality rates higher than 70%. Ribeiro et al. obtained similar results, however, against Rh. (Boophilus) microplus. Using methanolic extract of Hypericum polyanthemum in concentrations of 50.0, 25.0, 12.5 and 6.25 mg/ml were obtained mortality rates of 100%, 96.7% (± 1, 5), 84.7% (± 3.5) and 52.7% (± 2.5), respectively.
In this study, 70% ethanolic extract of the aerial parts of T. patula presented larval LC50 and larval LC95 of 7.43 mg/mL and 49.4 mg/mL, respectively. Fernandes et al., performing another type of assay, the classical larval packet test, found for ethanolic extract from stem bark of Magonia pubescens (Sapindaceae) LC50 and LC99 against larvae of Rh. sanguineus of 1.50 mg/mL and 9.99 mg/mL, respectively.
Briefly, in our study it was observed that low mortality rates caused by the tested extract on engorged adult forms and a lethal action close to 100% against larval forms. This discrepancy could be explained by the difference in the composition of the cuticle of both life stages of ticks. According Balashov, the cuticle of the ticks is formed by the outer layer, epicuticle (composed by waxes externally and by proteins internally) and the inner layer, called procuticle (protein and chitin). According Odhiambo, the layer of waxes or lipids is seen only from ecdysis in nymph and in greater quantity in the adult. Therefore, in engorged females, the solvents must first dissolve the lipid layer of the epicuticle in order to achieve the most polar layers of the cuticle, which consist of soluble proteins.
The 70% ethanolic extract of aerial parts of T. patula 50 mg/ml reduced egg laying in 21.5% and eliminated 99.78% of the larvae (LC50 = 7.43 mg/mL), although it was not effective on mortality of engorged female adult of Rh. sanguineus. Also it was determined that the best results were obtained with 5 minutes of immersion. Further studies should be conducted in order to verify the in vitro cytotoxicity of this extract, however, the results reported here are important because it is a pioneering investigation and has suggested a novel methodology using the larval packet test. If we consider the application of the product in the environment, we would completely eliminate one of the developmental stages of the ixodid Rh. sanguineus.
We thank the São Paulo Research Foundation (FAPESP) for financial support and University of Campinas (UNICAMP) by the partnership.
- Massard CL, Fonseca AH: Carrapatos e doenças transmitidas, comuns ao homem e aos animais. A Hora Vet. 2004, 135: 15-23.Google Scholar
- Guimarães JH, Tucci EC, Barros-Battesti DM: Ectoparasitos de importância veterinária. 2001, Editora Plêidade, São PauloGoogle Scholar
- Pegram RG, Keirans JE, Clifford CM, Walker JB: Clarification of the Rhipicephalus sanguineus group (Acari, Ixodoidea, Ixodidae). II. Rh. sanguineus (Latreille, 1806) and related species. Syst Parasitol. 1987, 10: 27-44. 10.1007/BF00009100.View ArticleGoogle Scholar
- Smith RD, Sells DM, Stephenson EH, Ristic M, Huxoll DL: Development of Ehrlichia canis, causative agent of canine ehrlichiosis, in the tick Rhipicephalus sanguineus and its differentiation from a symbiotic rickettsia. Am J Vet Res. 1976, 37 (2): 119-126.PubMedGoogle Scholar
- Gothe R, Wegerot S, Walden R, Walden A: Epidemiology of Babesia canis and Babesia gibsoni infections in dogs in Germany. Kieintierpraxis. 1989, 34 (7): 309-320.Google Scholar
- Dantas-Torres F: The brown dog tick, Rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae): from taxonomy to control. Vet Parasitol. 2008, 152 (3–4): 173-185.View ArticlePubMedGoogle Scholar
- Swango LJ, Bankemper KW, Kong LI: Infecções bacterianas, riquetsiais, protozoais e outras. Tratado de medicina veterinária interna: moléstias do cão e do gato. Edited by: Ettinger SJ. 1992, Manole, São Paulo, 277-311. 3Google Scholar
- Alcaíno H, Gorman T, Acosta P, Fredes F: Evaluación de cinco esquemas de control con cipermetrina del Rhipicephalus sanguineus en la Región Metropolitana de Chile. Arch Med Vet. 1995, 27: 45-51.Google Scholar
- Franc M, Cadiergues MC: Activity of a deltamethrin shampoo against Ctenocephalides felis and Rhipicephalus sanguineus in dogs. Vet Parasitol. 1999, 81: 341-346. 10.1016/S0304-4017(98)00257-X.View ArticlePubMedGoogle Scholar
- Jernigan AD, Mctier TL, Chieffo C, Thomas CA, Krautmann MJ, Hair JA, Young DR, Wang C, Rowan TG: Efficacy of selamectin against experimentally induced tick (Rhipicephalus sanguineus and Dermacentor variabilis) infestations on dogs. Vet Parasitol. 2000, 91: 359-375. 10.1016/S0304-4017(00)00305-8.View ArticlePubMedGoogle Scholar
- Otranto D, Lia RP, Cantacessi C, Galli G, Paradies P, Mallia E, Capelli G: Efficacy of a combination of imidacloprid 10%/permethrin 50% versus fipronil 10%/(S)-methoprene 12%, against ticks in naturally infected dogs. Vet Parasitol. 2005, 130: 293-304. 10.1016/j.vetpar.2005.04.014.View ArticlePubMedGoogle Scholar
- World Health Organization: Pesticides and their Application for the Control of Vectors and Pests of Public Health Importance. 2006, Geneva, 6Google Scholar
- Roma GC, Furquim KCS, Bechara GH, Camargo-Mathias MI: Permethrin-induced morphological changes in oocytes of Rhipicephalus sanguineus (Acari: Ixodidae) semi-engorged females. Food Chem Toxicol. 2010, 48: 825-830. 10.1016/j.fct.2009.12.016.View ArticlePubMedGoogle Scholar
- Miller RJ, George JE, Guerrero F, Carpenter L, Welch JB: Characterization of acaricide resistance in Rhipicephalus sanguineus (Latreille) (Acari: Ixodidae) collected from the Corozal Army Veterinary Quarantine Center. Panama. J Med Entomol. 2001, 38: 298-302. 10.1603/0022-2585-38.2.298.View ArticlePubMedGoogle Scholar
- Paião JCV, Monteiro AC, Kronka S: Susceptibility of the cattle tick Boophilus microplus (Acari: Ixodidae) to isolates of the fungus Beauveria bassiana. W J Microbiol Biotechnol. 2001, 17 (3): 245-251. 10.1023/A:1016653700599.View ArticleGoogle Scholar
- Dantas-Torres F, Figueredo LA, Faustino MAG: Ectoparasitos de cães provenientes de alguns municípios da região metropolitana do Recife, Pernambuco, Brasil. Rev Bras Parasitol Vet. 2004, 13 (4): 151-154.Google Scholar
- Prette N, Monteiro AC, Garcia MV, Soares VE: Patogenicidade de isolados de Beauveria bassiana para ovos, larvas e ninfas ingurgitadas de Rhipicephalus sanguineus. Ciênc Rural. 2005, 35 (4): 855-861.View ArticleGoogle Scholar
- Abdel-Shafy S, Zayed AA: In vitro acaricidal effect of plant extract of neem seed oil (Azadirachta indica) on egg, immature, and adult stages of Hyalomma anatolicum excavatum (Ixodoidea: Ixodidae). Vet Parasitol. 2002, 106: 89-96. 10.1016/S0304-4017(02)00023-7.View ArticlePubMedGoogle Scholar
- Carroll JF, Maradufu A, Warthen JDJ: An extract of Commiphora erythraea: a repellent and toxicant against tick. Entomol Exp Appl. 1989, 53: 111-116. 10.1111/j.1570-7458.1989.tb01294.x.View ArticleGoogle Scholar
- Fernandes FF, D’Alessandro WBD, Freitas EPS: Toxicity of extract of Magonia pubescens (Sapindales: Sapindaceae) St. Hil. to control the brown dog tick, Rhipicephalus sanguineus (Latreille) (Acari: Ixodidae). Neotrop Entomol. 2008, 37 (2): 205-208. 10.1590/S1519-566X2008000200016.View ArticlePubMedGoogle Scholar
- Arnosti A, Brienza PD, Furquim KCS, Chierice GO, Neto SC, Bechara GH, Sampieri BR, Camargo-Mathias MI: Effects of Ricinus communis oil esters on salivary glands of Rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae). Exp Par. 2011, 127: 569-574. 10.1016/j.exppara.2010.10.009.View ArticleGoogle Scholar
- Denardi SE, Bechara GH, Oliveira PR, Camargo-Mathias MI: Ultrastructural analysis of the oocytes of female Rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae) ticks subjected to the action of Azadirachta indica A. Juss (Neem). Ultrastruct Pathol. 2012, 36 (1): 56-67. 10.3109/01913123.2011.588819.View ArticlePubMedGoogle Scholar
- Sampieri BR, Arnosti A, Nunes PH, Furquim KCS, Chierice GO, Camargo-Mathias MI: Ultrastructural changes in the ovary cells of engorged Rhipicephalus sanguineus female ticks treated with esters of ricinoleic acid from castor oil (Ricinus communis). Microsc Res Tech. 2012, 75: 683-690. 10.1002/jemt.21112.View ArticlePubMedGoogle Scholar
- Yunes RA, Pedrosa RC, Cechinel-Filho V: Fármacos e fitoterápicos: a necessidade do desenvolvimento da indústria de fitoterápicos no Brasil. Quim Nova. 2001, 24 (1): 147-152. 10.1590/S0100-40422001000100025.View ArticleGoogle Scholar
- Gilman EF: University of Florida, Cooperative Extension Service, Institute of Food and Agricultural Sciences. 1999, Fact Sheet FPS-571: Tagetes patula French marigold. FloridaGoogle Scholar
- Massera PE, Rodriguez T, Giulietti AM: Thiophene production in transformed roots cultures of Tagetes filifolia. Biotec Lett. 1998, 20 (6): 573-577. 10.1023/A:1005353829091.View ArticleGoogle Scholar
- Bano H, Ahmed SW, Azhar I, Ali MS, Alam N: Chemical constituents of Tagetes patula L. Pak J Pharm Sci. 2002, 15 (2): 1-12.PubMedGoogle Scholar
- Ivancheva S, Zdravkova M: Flavonoids in Tagetes patula. Fitoterapia. 1993, 64: 555-558.Google Scholar
- Tarpo E: Patuletin isolation form Tagetes patula flowers. Farmasia. 1967, 15: 685-688.Google Scholar
- Tarpo E: Isolation of patulitrine from the flowers of Tagetes patula. Farmasia. 1968, 16: 93-98.Google Scholar
- Tarpo E: Isolation of quercetagetin from Tagetes patula flowers. Farmasia. 1969, 17: 739-744.Google Scholar
- Bhardwaj DK, Bisht MS, Uain SC, Metha CK, Sharma GC: Quercetagetin 5-methyl ether from the petal of Tagetes patula. Phytochemistry. 1980, 19: 713-714. 10.1016/0031-9422(80)87053-1.View ArticleGoogle Scholar
- Bechara GH, Szabó MPJ, Ferreira BR, Garcia MV: Rhipicephalus sanguineus in Brazil: feeding and reproductive aspects under laboratorial conditions. Rev Bras Parasitol Vet. 1995, 4: 61-66.Google Scholar
- Ribeiro VLS, Avancini C, Gonçalves K, Toigo E, Von Poser G: Acaricidal activity of Calea serrata (Asteraceae) on Boophilus microplus and Rhipicephalus sanguineus. Vet Parasitol. 2008, 151: 351-354. 10.1016/j.vetpar.2007.11.007.View ArticlePubMedGoogle Scholar
- Sabatini GA, Kemp DH, Hughes S, Nari A, Hansen J: Tests to determine LC50 and discriminating doses for macrocyclic lactones against the cattle tick. Boophilus microplus. Vet Parasitol. 2001, 95: 53-62. 10.1016/S0304-4017(00)00406-4.View ArticlePubMedGoogle Scholar
- Drummond RO, Ernest SE, Trevino JL, Gladney WJ, Graham OH: Boophilus annulatus and Boophilus microplus: Laboratory test of insecticides. J Econ Entomol. 1973, 66 (1): 130-133.View ArticlePubMedGoogle Scholar
- Shaw RD: Culture of an organophosphorus-resistant strain of Boophilus microplus (Can.) and an assessment of its resistance spectrum. Bull Entomol Res. 1966, 53: 563-578.Google Scholar
- Abbott WS: A method of computing the effectiveness of an insecticide. J Econ Entomol. 1925, 18: 265-267.View ArticleGoogle Scholar
- FAO: Food and Agriculture Organization: Resistance management and integrated parasites control in ruminants. Guidelines, Module 1: Ticks - Acaricide Resitance, Diagnosis, Management and Prevention. 2004, Rome, 25-77.Google Scholar
- Tereschuk ML, Riera MVQ, Guillermo RC, Abdala LR: Antimicrobial activity of flavonoids from leaves of Tagetes minuta. J Ethnopharmacol. 1997, 56: 227-232. 10.1016/S0378-8741(97)00038-X.View ArticlePubMedGoogle Scholar
- Abdala LR: Flavonoids of the aerial parts from Tagetes lucida (Asteraceae). Biochem Syst Ecol. 1999, 27: 753-754. 10.1016/S0305-1978(99)00011-3.View ArticleGoogle Scholar
- Abdala LR: Flavonoids of Tagetes stenophylla Robinson (Asteraceae) as taxonomic markers. Biochem Syst Ecol. 2000, 28: 717-718. 10.1016/S0305-1978(98)00040-4.View ArticlePubMedGoogle Scholar
- Parejo I, Jáuregui O, Viladomat F, Bastida J, Codina C: Characterization of acylated flavonoid-O-glycosides and methoxylated flavonoids from Tagetes maxima by liquid chromatography coupled to electrospray ionization tandem mass spectrometry. Mass Spectrom. 2004, 18: 2801-2810.Google Scholar
- Guinot P, Gargadennec A, Valette G, Fruchier A, Andary C: Primary flavonoids in marigold dye: extraction, structure, and involvement in dyeing process. Phytochem Anal. 2008, 19: 46-51. 10.1002/pca.1014.View ArticlePubMedGoogle Scholar
- Mabry TJ, Markham KG, Thomas MB: The Systematic identification of flavonoids. 1970, Springer-Verlag Publication, New YorkView ArticleGoogle Scholar
- Furlong J: Práticas de Manejo Sanitário em Bovinos de Leite. Juiz de Fora: EMBRAPA Gado de Leite - Área de Comunicação Empresarial. Booohilus microplus, o carrapato dos bovinos. 2000, 17-33.Google Scholar
- Benavides A, Montoro P, Bassarello C, Piacente S, Pizza C: Catechin derivatives in Jatropha macrantha stems: characterisation and LC/ESI/MS/MS quali-quantitative analysis. J Pharmac Biomed Anal. 2006, 40: 639-647. 10.1016/j.jpba.2005.10.004.View ArticleGoogle Scholar
- Zhou S, Hamburger M: Application of liquid chromatography-atmospheric pressure ionization mass spectrometry in natural products analysis. Evaluation and optimization of electrospray and heated nebulizer interfaces. J Chromatogr. 1996, 755: 189-204. 10.1016/S0021-9673(96)00617-6.View ArticleGoogle Scholar
- Wolfender JL, Maillard M, Marston A, Hostettmann K: Mass spectrometry of underivatised naturally occurring glycosides. Phytochem Anal. 1992, 3: 193-214. 10.1002/pca.2800030502.View ArticleGoogle Scholar
- Abdala LR, Seeligmann P: Natural Distribution of Flavonoids in Tagetes minuta. Biochem Syst Ecol. 1995, 23 (5): 567-568. 10.1016/0305-1978(95)00045-V.View ArticleGoogle Scholar
- Abdala LR: Tagetes tenuifolia Cav. (Asteraceae): some chemosystematic implications of their flavonoids. Biochem Syst Ecol. 2001, 29: 861-863. 10.1016/S0305-1978(00)00115-0.View ArticlePubMedGoogle Scholar
- Abdala LR: Chemosystematic interpretations of the flavonoids identified in Tagetes gracilis (Asteraceae). Biochem Syst Ecol. 2003, 31: 323-325. 10.1016/S0305-1978(02)00156-4.View ArticleGoogle Scholar
- Ribeiro VLS, Toigo E, Bordignon SAL, Gonçalves K, Von Poser G: Acaricidal properties of extracts from the aerial parts of Hypericum polyanthemum on the cattle tick Boophilus microplus. Vet Parasitol. 2007, 147: 199-203. 10.1016/j.vetpar.2007.03.027.View ArticlePubMedGoogle Scholar
- Broglio-Micheletti SMF, Valente ECN, Souza LA, Dias NS, Araújo AMN: Extratos de plantas no controle de Rhipicephalus (Boophilus) microplus (Canestrini, 1887) (Acari: Ixodidae) em laboratório. Rev Bras Parasitol Vet. 2009, 18 (4): 44-48. 10.4322/rbpv.01804008.View ArticlePubMedGoogle Scholar
- Balashov YS: Blood sucking ticks (Ixodidae) vectors of diseases of man and animals. Misc Pub Entomol Soc Am. 1972, 8: 161-376.Google Scholar
- Odhiambo TR: Current themes in tropical science: physiology of ticks. 1980, Pergamon, OxfordGoogle Scholar
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