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Czarnobai De Jorge B, Koßmann A, Hummel HE, Gross J. Evaluation of a push-and-pull strategy using volatiles of host and non-host plants for the management of pear psyllids in organic farming. FRONTIERS IN PLANT SCIENCE 2024; 15:1375495. [PMID: 38841281 PMCID: PMC11150531 DOI: 10.3389/fpls.2024.1375495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Accepted: 04/30/2024] [Indexed: 06/07/2024]
Abstract
Introduction Pear decline (PD) is one of the most devastating diseases of Pyrus communis in Europe and North America. It is caused by the pathogen 'Candidatus Phytoplasma pyri' and transmitted by pear psyllids (Cacopsylla pyri, C. pyricola, and C. pyrisuga). Identifying attractant and repellent volatile organic compounds (VOCs) could improve the development of alternative plant protection measurements like push-pull or attract-and-kill strategies against pear psyllids. Our objective was to investigate which chemical cues of the host plant could influence the host-seeking behavior of pear psyllids, and if cedarwood (CWO) and cinnamon bark (CBO) essential oils could serve as repellents. Results and discussion Based on the literature, the five most abundant VOCs from pear plants elicited EAG responses in both C. pyri and C. pyrisuga psyllid species. In Y-olfactometer trials, single compounds were not attractive to C. pyri. However, the main compound mixture was attractive to C. pyri and C. pyrisuga females. CWO and CBO were repellent against C. pyri, and when formulated into nanofibers (NF), both were repellent in olfactometer trials. However, CBO nanoformulation was ineffective in masking the odors of pear plants. In a field trial, attractive, repellent CWO and blank formulated NF were inserted in attractive green sticky traps. C. pyri captures in traps with CWO NF were statistically lower than in traps with the attractive mixture. Nevertheless, no statistical differences in the numbers of caught specimens were observed between CWO NF and those captured in green traps baited with blank NF. Transparent traps captured fewer psyllids than green ones. In a second field study with a completed different design (push-and-count design), dispensers filled with CBO were distributed within the plantation, and attractive green sticky traps were placed around the plantation. The numbers of trapped pear psyllids increased significantly in the border of the treated plantation, showing that psyllids were repelled by the EOs in the plantation. Although further field evaluation is needed to assess and improve their effectiveness, our results show that these aromatic compounds, repellent or attractive both in nanoformulations and marking pen dispensers, offer great potential as an environmentally sustainable alternative to currently applied methods for managing pear decline vectors.
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Affiliation(s)
- Bruna Czarnobai De Jorge
- Laboratory of Applied Chemical Ecology, Institute for Plant Protection in Fruit Crops and Viticulture, Julius Kühn-Institut, Federal Research Centre for Cultivated Plants, Dossenheim, Germany
- Laboratory of Plant Chemical Ecology, Technical University of Darmstadt, Darmstadt, Germany
| | - Alicia Koßmann
- Laboratory of Applied Chemical Ecology, Institute for Plant Protection in Fruit Crops and Viticulture, Julius Kühn-Institut, Federal Research Centre for Cultivated Plants, Dossenheim, Germany
- Laboratory of Plant Chemical Ecology, Technical University of Darmstadt, Darmstadt, Germany
| | - Hans E. Hummel
- Laboratory of Organic Agriculture, Justus-Liebig University of Giessen, Giessen, Germany
- Laboratory of Biodiversity and Ecological Entomology, Illinois Natural History Survey, Champaign, IL, United States
| | - Jürgen Gross
- Laboratory of Applied Chemical Ecology, Institute for Plant Protection in Fruit Crops and Viticulture, Julius Kühn-Institut, Federal Research Centre for Cultivated Plants, Dossenheim, Germany
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Del'Duca A, de Paiva Oliveira GF, de Andrade Faustino M, Borges LA, Sixel ES, Miranda CAS, Rodrigues EM, Medeiros JD, de Sá Guimarães A, Mendonça LC, Cesar DE. Biocontrol capacity of bacteria isolated from sawdust of the dairy cattle production environment. Res Vet Sci 2024; 166:105103. [PMID: 38061143 DOI: 10.1016/j.rvsc.2023.105103] [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: 10/09/2023] [Revised: 11/29/2023] [Accepted: 12/01/2023] [Indexed: 01/01/2024]
Abstract
This research paper aimed to find endemic bacteria from the cattle production system to control the growth of mastitis pathogens. Bacteria were isolated from compost barn sawdust of two dairy cattle systems and later tested to verify their ability to control the growth of Staphylococcus aureus isolates obtained from cattle with mastitis. Bacterial isolates from these systems were tested to verify biocontrol capacity using the double-layer method. A total of 189 isolates were obtained from all samples by considering the morphology of the different bacterial colonies, with 30 isolates showing positive results for the growth control of at least one S. aureus strain and 19 isolates showing the ability to control more than one pathogen strain. The ability to control more than one pathogen and present a significant halo of inhibition in our isolates represents positive traits in the search for cattle mastitis biocontrol microorganisms. Thus, the results obtained represent the range of bacteria capable of controlling the pathogens without the use of antibiotics.
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Alvarado TD, Mariezcurrena Berasain MD, Salem AZM, Pinzón Martínez DL. Antimicrobial and Antioxidant Activities of Two Medicinal Plants Cuphea aequipetala var. hispida (Cav.) Koehne and Eryngium comosum Delaroche F Against Bacteria Related to Equine Infections. J Equine Vet Sci 2020; 94:103269. [PMID: 33077075 DOI: 10.1016/j.jevs.2020.103269] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 09/06/2020] [Accepted: 09/07/2020] [Indexed: 12/12/2022]
Abstract
Functional biocompounds beneficial for animals and humans are in Mexican folk herbs. Cuphea and Eryngium species presented antimicrobial potential. Natural antibiotic uses by ethnoveterinary research with medicinal plants in equine infection or digestive diseases need more scientific evidence. Staphylococcus aureus, Escherichia coli, Salmonella enterica serotype Enteritidis are etiological agents in horses responsible for stable infections, abortions, fetal or perinatal deaths, and resistant intrahospital infections. The main objective of the present research was to evaluate the potential of antimicrobial and antioxidant activities of two Mexican medicinal plants Cuphea aequipetala var. hispida (Cav.) Koehne and Eryngium comosum Delaroche F over Listeria monocytogenes ATCC 19115, Staphylococcus sp., E. coli ATCC 25922, and S. enterica serotype Enteritidis ATCC 13076 bacterium reference strains related to equine infections. Determination of total phenol, saponins, antioxidant activity (ABTS), and antimicrobial activity with diffusion-sensitive discs was performed in triplicate. All the strains were sensitive for both extracts except for E. coli strain that was inhibited only by C. aequipetala. Staphylococcus sp. and S. enterica strains were inhibited equally by both extracts. E. comosum extracts tested have shown the highest effect over L. monocytogenes. In summary, antimicrobial activity was similar to the reported activity of Eryngium species extracts with other different solvents. Present extracts are suggested as a potential alternative antibiotic; definitely, more specific equine pathogen inhibition tests are needed in feed additives for horse nutrition research. In conclusion, antimicrobial activities of Cuphea aequipetala var. hispida (Cav.) Koehne and Eryngium comosum Delaroche F over reference strains related to equine infections suggested these medicinal plants as potential antibiotic sources for horse diseases.
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Affiliation(s)
- Tonantzin Díaz Alvarado
- Maestria en Agroindustri Rural, Desarrollo Territorial y Turismo Agroalimentario, Instituto de Ciencias Agropecuarias y Rurales, Universidad Autonoma del Estado de Mexico, Instituto Literario Avenue, Toluca, Estado de Mexico, Mexico
| | | | - Abdelfattah Z M Salem
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Autonoma del Estado de Mexico, Instituto Literario Avenue, Toluca, Estado de Mexico, Mexico
| | - Dora Luz Pinzón Martínez
- Facultad de Ciencias Agricolas, Universidad Autonoma del Estado de Mexico, Instituto Literario Avenue, Toluca, Estado de Mexico, Mexico.
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Tavares TD, Antunes JC, Padrão J, Ribeiro AI, Zille A, Amorim MTP, Ferreira F, Felgueiras HP. Activity of Specialized Biomolecules against Gram-Positive and Gram-Negative Bacteria. Antibiotics (Basel) 2020; 9:E314. [PMID: 32526972 PMCID: PMC7344598 DOI: 10.3390/antibiotics9060314] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 06/01/2020] [Accepted: 06/08/2020] [Indexed: 11/24/2022] Open
Abstract
The increased resistance of bacteria against conventional pharmaceutical solutions, the antibiotics, has raised serious health concerns. This has stimulated interest in the development of bio-based therapeutics with limited resistance, namely, essential oils (EOs) or antimicrobial peptides (AMPs). This study envisaged the evaluation of the antimicrobial efficacy of selected biomolecules, namely LL37, pexiganan, tea tree oil (TTO), cinnamon leaf oil (CLO) and niaouli oil (NO), against four bacteria commonly associated to nosocomial infections: Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli and Pseudomonas aeruginosa. The antibiotic vancomycin and silver nanoparticles (AgNPs) were used as control compounds for comparison purposes. The biomolecules were initially screened for their antibacterial efficacy using the agar-diffusion test, followed by the determination of minimal inhibitory concentrations (MICs), kill-time kinetics and the evaluation of the cell morphology upon 24 h exposure. All agents were effective against the selected bacteria. Interestingly, the AgNPs required a higher concentration (4000-1250 µg/mL) to induce the same effects as the AMPs (500-7.8 µg/mL) or EOs (365.2-19.7 µg/mL). Pexiganan and CLO were the most effective biomolecules, requiring lower concentrations to kill both Gram-positive and Gram-negative bacteria (62.5-7.8 µg/mL and 39.3-19.7 µg/mL, respectively), within a short period of time (averaging 2 h 15 min for all bacteria). Most biomolecules apparently disrupted the bacteria membrane stability due to the observed cell morphology deformation and by effecting on the intracellular space. AMPs were observed to induce morphological deformations and cellular content release, while EOs were seen to split and completely envelope bacteria. Data unraveled more of the potential of these new biomolecules as replacements for the conventional antibiotics and allowed us to take a step forward in the understanding of their mechanisms of action against infection-related bacteria.
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Affiliation(s)
| | | | | | | | | | | | | | - Helena P. Felgueiras
- Centre for Textile Science and Technology (2C2T), Department of Textile Engineering, University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal; (T.D.T.); (J.C.A.); (J.P.); (A.I.R.); (A.Z.); (M.T.P.A.); (F.F.)
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Elghandour MM, Kanth Reddy PR, Salem AZ, Ranga Reddy PP, Hyder I, Barbabosa-Pliego A, Yasaswini D. Plant Bioactives and Extracts as Feed Additives in Horse Nutrition. J Equine Vet Sci 2018. [DOI: 10.1016/j.jevs.2018.06.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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de Aguiar FC, Solarte AL, Tarradas C, Luque I, Maldonado A, Galán-Relaño Á, Huerta B. Antimicrobial activity of selected essential oils against Streptococcus suis isolated from pigs. Microbiologyopen 2018; 7:e00613. [PMID: 29575822 PMCID: PMC6291787 DOI: 10.1002/mbo3.613] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 02/01/2018] [Indexed: 12/03/2022] Open
Abstract
The inhibitory potential by contact and vapor of basil, cinnamon, clove, peppermint, oregano, rosemary, common thyme, and red thyme essential oils (EOs) against 20 strains of Streptococcus suis was determined by the disk diffusion test. The broth microdilution method was used to determine the minimal inhibitory and minimal bactericidal concentration (MIC and MBC) of the four selected oils. Furthermore, the bactericidal power (ratio MBC/MIC) was calculated. The EOs with the major potential in the disk diffusion method were red thyme, common thyme, oregano, and cinnamon (∅ mean 16.5–34.2 mm), whereas cinnamon did not show vapor activity. In the microdilution test, all the EOs showed notable antimicrobial activity (MIC90 and MBC90 312.5–625 μg·ml−1) and a strong bactericidal power (ratio = 1). This is the first study that selects essential oils against S. suis. New studies about the possible synergic effect of EOs with antibiotics and about toxicity and efficacy in in vivo conditions are recommended.
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Affiliation(s)
- Fabiana C de Aguiar
- Departamento de Sanidad Animal, Universidad de Córdoba, International Excellence Agrifood Campus 'CeiA3', Córdoba, Spain
| | - Ana Lucía Solarte
- Departamento de Sanidad Animal, Universidad de Córdoba, International Excellence Agrifood Campus 'CeiA3', Córdoba, Spain
| | - Carmen Tarradas
- Departamento de Sanidad Animal, Universidad de Córdoba, International Excellence Agrifood Campus 'CeiA3', Córdoba, Spain
| | - Inmaculada Luque
- Departamento de Sanidad Animal, Universidad de Córdoba, International Excellence Agrifood Campus 'CeiA3', Córdoba, Spain
| | - Alfonso Maldonado
- Departamento de Sanidad Animal, Universidad de Córdoba, International Excellence Agrifood Campus 'CeiA3', Córdoba, Spain
| | - Ángela Galán-Relaño
- Departamento de Sanidad Animal, Universidad de Córdoba, International Excellence Agrifood Campus 'CeiA3', Córdoba, Spain
| | - Belén Huerta
- Departamento de Sanidad Animal, Universidad de Córdoba, International Excellence Agrifood Campus 'CeiA3', Córdoba, Spain
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Palagi MAF, Feltre K, Gonzaga IVF, de Lima Costa R, de Moraes Filho LAJ, de Carvalho Balieiro JC, de Oliveira Gobesso AA. Supplementation with live yeasts and essential oils does not alter blood, fecal and digestible parameters in horses. Livest Sci 2017. [DOI: 10.1016/j.livsci.2017.10.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Solarte AL, Astorga RJ, Aguiar F, Galán-Relaño Á, Maldonado A, Huerta B. Combination of Antimicrobials and Essential Oils as an Alternative for the Control ofSalmonella entericaMultiresistant Strains Related to Foodborne Disease. Foodborne Pathog Dis 2017; 14:558-563. [DOI: 10.1089/fpd.2017.2295] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Affiliation(s)
- Ana Lucía Solarte
- Department of Animal Health, Veterinary Faculty, University of Cordoba, Cordoba, Spain
| | - Rafael Jesús Astorga
- Department of Animal Health, Veterinary Faculty, University of Cordoba, Cordoba, Spain
| | - Fabiana Aguiar
- Department of Animal Health, Veterinary Faculty, University of Cordoba, Cordoba, Spain
| | - Ángela Galán-Relaño
- Department of Animal Health, Veterinary Faculty, University of Cordoba, Cordoba, Spain
| | - Alfonso Maldonado
- Department of Animal Health, Veterinary Faculty, University of Cordoba, Cordoba, Spain
| | - Belén Huerta
- Department of Animal Health, Veterinary Faculty, University of Cordoba, Cordoba, Spain
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