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United States Department of Agriculture

Agricultural Research Service

Related Topics

Raymond K Yokomi (Ray)
Crop Diseases, Pests and Genetics Research
Plant Pathology

Phone: (559) 596-2990
Fax: (559) 596-2992

9611 S. RIVERBEND AVE.
PARLIER , CA 93648

Projects
Characterization, Epidemiology and Management Strategies of Citrus Tristeza Virus and Spiroplasma citri on Citrus in California
In-House Appropriated (D)
  Accession Number: 422988
Establish a System to Infect and Maintain Nicotiana Benthamiana and Citrus with the Recombinant CTV
Reimbursable Cooperative Agreement (R)
  Accession Number: 429238
Assessing Impact of MCA13-Reactive Citrus Tristeza Virus Isolates in Tulare County Pest Control District Citrus Orchards
Trust Fund Cooperative Agreement (T)
  Accession Number: 429473
Development of a TaqMan Array Card for Multiplex Detection of Citrus Pathogens by Real-Time PCR
Trust Fund Cooperative Agreement (T)
  Accession Number: 424504
Evaluation of California Mild CTV Strains that Replicate to High Titer in Citrus Rootstocks
Trust Fund Cooperative Agreement (T)
  Accession Number: 428453

Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
The complete mitochondrial genome sequence of Bactericera cockerelli and its comparison with three other psylloidea species -
Wu, F., Deng, X., Wallis, C.M., Trumble, J., Prager, S., Yokomi, R.K., Liang, G., Cen, Y., Chen, J. 2016. The complete mitochondrial genome sequence of Bactericera cockerelli and its comparison with three other psylloidea species. PLoS One. 11(5):e0155318. doi: 10.1371/journal.pone.0155318.
Digital PCR for detection of citrus pathogens -
Selvaraj, V., Maheshwari, Y., Hajeri, S., Yokomi, R.K. 2016. Digital PCR for detection of citrus pathogens. Conference of International Organization of Citrus Virologists. p.71.
Molecular characterization of Peruvian Citrus tristeza virus isolates based on 3’UTR sequences -
Selvaraj, V., Maheshwari, Y., Bederski, K., Hartung, J.S., Hajeri, S., Yokomi, R.K. 2016. Molecular characterization of Peruvian Citrus tristeza virus isolates based on 3’UTR sequences. Conference of International Organization of Citrus Virologists. p.58.
Lateral flow immunoassay for the rapid detection of citrus tristeza virus -
Maheshwari, Y., Selvaraj, V., Ramadugu, C., Keremane, M.L., Hajeri, S., Yokomi, R.K. 2016. Lateral flow immunoassay for the rapid detection of citrus tristeza virus. Conference of International Organization of Citrus Virologists. p.57.
Fighting HLB with Citrus tristeza virus (CTV): Heterogeneity in the genome ends of CTV is an important consideration -
Ng, J., Chen, A., Yokomi, R.K. 2016. Fighting HLB with Citrus tristeza virus (CTV): Heterogeneity in the genome ends of CTV is an important consideration. Citrograph. 7:76-81.
Survey of citrus tristeza virus populations in Central California that react with MCA13 monoclonal antibody -
Yokomi, R.K., Hajeri, S., Barnier, J. 2015. Survey of citrus tristeza virus populations in Central California that react with MCA13 monoclonal antibody. Phytopathology. 105:S4.154.
Nucleotide heterogeneity at the genomic 5’- and 3’-termini of California (CA) isolates of Citrus tristeza virus (CTV) -
Chen, A.Y., Watanabe, S., Yokomi, R.K., Ng, J.C. 2015. Nucleotide heterogeneity at the genomic 5’- and 3’-termini of California (CA) isolates of Citrus tristeza virus (CTV). Phytopathology. 105:S4.27.
Volatile Organic Compound (VOC) profiling of Citrus tristeza virus (CTV) infection in sweet orange citrus varietals using thermal desorption gas chromatography time of flight mass spectrometry (TD-GC/TOF-MS) -
Cheung, W.H., Zhao, W., Pasamontes, A., Kapaun, T., Yokomi, R.K., Swe, M., Fiehn, O., Davis, C.E. 2015. Volatile Organic Compound (VOC) profiling of Citrus tristeza virus (CTV) infection in sweet orange citrus varietals using thermal desorption gas chromatography time of flight mass spectrometry (TD-GC/TOF-MS). Metabolomics. doi: 10.1007/s11306-015-0807-6.
Survey of the auchenorrhyncha in the Salento Peninsula in search of putative vectors of Xylella fastidiosa Pauca Codiro strain -
Cornara, D., Loconsole, G., Boscia, D., Yokomi, R.K., Bosco, D., Porcelli, F., Saponari, M., Martelli, G. 2014. Survey of the auchenorrhyncha in the Salento Peninsula in search of putative vectors of Xylella fastidiosa Pauca Codiro strain. Journal of Plant Pathology. 96(4):S4.98.
Improved real-time PCR diagnosis of citrus stubborn disease by targeting prophage genes of Spiroplasma citri -
Wang, X., Doddapaneni, H., Chen, J., Yokomi, R.K. 2015. Improved real-time PCR diagnosis of citrus stubborn disease by targeting prophage genes of Spiroplasma citri. Plant Disease. 99:149-154.
Infectivity and transmission of Xylella fastidiosa Salento strain by Philaenus spumarius L. (Hemiptera: Aphrophoridae) in Apulia, Italy -
Saponari, M., Loconsole, G., Cornara, D., Yokomi, R.K., De Stradis, A., Boscia, D., Bosco, D., Martelli, G., Krugner, R., Porcelli, F. 2014. Infectivity and transmission of Xylella fastidiosa Salento strain by Philaenus spumarius L. (Hemiptera: Aphrophoridae) in Apulia, Italy. Journal of Economic Entomology. 107(4):1316-1319.
Novel mild strains of Citrus tristeza virus from California and Peru. -
Yokomi, R.K., Hajeri, S., Bederski, K., Giampetruzzi, A., Loconsole, G., Saponari, M. 2014. Novel mild strains of Citrus tristeza virus from California and Peru. Phytopathology. 104:S3.133.
Thirty years of citrus tristeza virus observations in Peru -
Bederski, K., Silvestre, P., Roistacher, C., Giampetruzzi, A., Lonconsole, G., Hartung, J.S., Saponari, M., Yokomi, R.K. 2014. Thirty years of citrus tristeza virus observations in Peru. Society of Citrus Nurserymen International Congress. Available:http://iscn.co.
Genetic diversity of citrus tristeza virus from cross-protected and unprotected citrus trees after 20 years of natural challenge in Peru -
Silvestre, P., Bederski, K., Roistacher, C., Giampetruzzi, A., Loconsole, G., Hartung, J.S., Saponari, M., Yokomi, R.K. 2014. Genetic diversity of citrus tristeza virus from cross-protected and unprotected citrus trees after 20 years of natural challenge in Peru. In: Abstract Book of the 10th Congress, International Society of Citrus Nurseries, Feb 14-19, 2014, Mazatlan, Sinaloa, Mexico.
Deep sequencing of small RNAs from citrus affected by graft-transmissible diseases of unknown etiology leads to discovery of two novel viruses -
Loconsole, G., Giampetruzzi, A., Saldarelli, P., Onelge, N., Yokomi, R.K., Saponari, M. 2015. Deep sequencing of small RNAs from citrus affected by graft-transmissible diseases of unknown etiology leads to discovery of two novel viruses. Acta Horticulturae. 1065(2):817-824.
Past and future of a century old Citrus Tristeza Virus collection: A California citrus germplasm tale -
Wang, J., Bozan, O., Kwon, S., Rucker, T., Yokomi, R.K., Lee, R.F., Folimonova, S., Greer, G., Krueger, R., Bash, J., Vidalakis, G. 2013. Past and future of a century old Citrus Tristeza Virus collection: A California citrus germplasm tale . Frontiers in Microbiology. 4:366. DOI: 10.3389/fmicb.2013.00366.
Rapid differentiation of citrus Hop stunt viroid variants by use of real-time RT-PCR and high resolution melting analysis -
Loconsole, G., Onelge, N., Yokomi, R.K., Abou-Kubaa, R., Savino, V., Saponari, M. 2013. Rapid differentiation of citrus Hop stunt viroid variants by use of real-time RT-PCR and high resolution melting analysis. Molecular and Cellular Probes. 27:221-229.
Validation of high-throughput real time polymerase chain reaction assays for simultaneous detection of invasive citrus pathogens -
Saponari, M., Loconsole, G., Liao, H., Bo, J., Savino, V., Yokomi, R.K. 2013. Validation of high-throughput real time polymerase chain reaction assays for simultaneous detection of invasive citrus pathogens. Journal of Virological Methods. 193:478-486.
Prophages in “Candidatus Liberibacter asiaticus” and Spiroplasma citri -
Chen, J., Deng, X., Wang, X., Yokomi, R.K. 2013. Prophages in “Candidatus Liberibacter asiaticus” and Spiroplasma citri. In: Book of Abstracts, 19th Conference of International Organization of Citrus Virologists. p.78.
Occurrence, sequence polymorphism and population structure of Circulifer tenellus virus 1 in a field population of the beet leafhopper -
Spear, A., Yokomi, R.K., French, R.C., Stenger, D.C. 2013. Occurrence, sequence polymorphism and population structure of Circulifer tenellus virus 1 in a field population of the beet leafhopper. Virus Research. 176:307-311.
Molecular characterization of Cirus tristeza virus isolates associated with stem pitting CTV cross-protection in Peru -
Differentiation of citrus Hop stunt viroid variants by real-time RT-PCR and high resolution melting analysis -
Molecular diversity of Citrus tristeza virus in California -
Wang, J., Yokomi, R.K., Lee, R.F., Folimonova, S., Vidalakis, G. 2013. Molecular diversity of Citrus tristeza virus in California. Phytopathology. 103:S2.156.
Sensitive detection of Spiroplasma citri by targeting prophage sequences -
Wang, X., Yokomi, R.K., Chen, J. 2013. Sensitive detection of Spiroplasma citri by targeting prophage sequences. Phytopathology. 103:S2.157.
Small RNA profiling reveals phosphorus deficiency as a contributing factor in symptom expression for Citrus Huanglongbing Disease -
Zhao, H., Sun, R., Albrecht, U., Padmanabhan, C., Wang, A., Coffey, M.D., Girke, T., Wang, Z., Close, T.J., Roose, M., Yokomi, R.K., Folimonova, S., Vidalakis, G., Rouse, R., Bowman, K.D., Jin, H. 2013. Small RNA profiling reveals phosphorus deficiency as a contributing factor in symptom expression for Citrus Huanglongbing Disease. Molecular Plant. 6(2):301-310.
Past and future of a century old Citrus Tristeza virus collection: A California citrus germplasm tale -
Wang, J., Orhan, B., Kwon, S., Rucker, T., Yokomi, R.K., Lee, R.F., Folimonova, S.Y., Greer, G., Krueger, R., Bash, J., Vidalakis, G. 2013. Past and future of a century old Citrus Tristeza virus collection: A California citrus germplasm tale. Frontiers in Microbiology. Available:http://www.dx.doi.org/10.3389/fmicb.2013.00366.
Presence of two host races of Aphis gossypii Glover (Hemiptera: Aphididae) collected in Turkey -
Satar, S., Kersting, U., Yokomi, R.K. 2012. Presence of two host races of Aphis gossypii Glover (Hemiptera: Aphididae) collected in Turkey. Annals of Applied Biology. 162:41-49.
Deep sequencing of citrus affected by graft-transmissible diseases of unknown etiology leads to discovery of two novel viruses. -
Loconsole, G., Giampetruzzi, A., Saldarelli, P., Yokomi, R.K., Onelge, N., Saponari, M. 2012. Deep sequencing of citrus affected by graft-transmissible diseases of unknown etiology leads to discovery of two novel viruses. International Citrus Congress Proceedings. S14011, p. 237.
Molecular diversity of Citrus tristeza virus (CTV) strains collected over the past 50 years and maintained in CTV collections in California -
Wang, J., Bozan, O., Kwon, S., Rucker, T., Thomas, C., Yokomi, R.K., Lee, R.F., Folimonova, S., Vidalakis, G. 2012. Molecular diversity of Citrus tristeza virus (CTV) strains collected over the past 50 years and maintained in CTV collections in California. International Citrus Congress Proceedings. S14P06, p.240.
Identification and characterization of Citrus yellow vein clearing virus, a putative new member of the genus Mandarivirus infecting Citrus spp. -
Loconsole, G., Onelge, N., Potere, O., Giampetruzzi, A., Bozan, O., Satar, S., De Stradis, A., Savino, V., Yokomi, R.K., Saponari, M. 2012. Identification and characterization of Citrus yellow vein clearing virus, a putative new member of the genus Mandarivirus infecting Citrus spp. Phytopathology. 102: 1168-1175.
Genetic variation of Spiroplasma citri populations in California revealed by two genomic loci -
Wang, X., Doddapaneni, H., Chen, J., Yokomi, R.K. 2012. Genetic variation of Spiroplasma citri populations in California revealed by two genomic loci . International Citrus Congress Proceedings. S12P35, p. 213.
Investigation of seedling yellows cross protection by mild components of the Dekopon strain of Citrus tristeza virus -
Yokomi, R.K., Saponari, M., Doddapaneni, H. 2011. Investigation of seedling yellows cross protection by mild components of the Dekopon strain of Citrus tristeza virus. Citrograph. 3(4):38-43.
Citrus tristeza virus-aphid interactions -
Harper, S.J., Yokomi, R.K., Dawson, W.O. 2016. Citrus tristeza virus-aphid interactions. In: Brown, J.K., editor. Vector-Mediated Transmission of Plant Pathogens. St. Paul, MN: APS Press. p. 121-130.
Development of a High Throughput Assay for Rapid and Accurate 10-Plex Detection of Citrus Pathogens -
Wang, J., Vidalakis, G., Lee, R., Yokomi, R.K. 2012. Development of a High Throughput Assay for Rapid and Accurate 10-Plex Detection of Citrus Pathogens. Phytopathology. 102:S4.131.
Estimation of incidence and spatial temporal distribution of Citrus Stubborn disease -
Yokomi, R.K., Sisterson, M.S. 2012. Estimation of incidence and spatial temporal distribution of Citrus Stubborn disease. Phytopathology. 102:S4:141.
Genetic differentiation and biology of Citrus Tristeza virus populations spreading in California -
Yokomi, R.K., Saponari, M., Metheny, P., Vidalakis, G. 2012. Genetic differentiation and biology of Citrus Tristeza virus populations spreading in California. International Organization of Citrus Virologists Proceedings. Available: http://www.ivia.es/iocv/archivos/Proceedings_XVIII_Conference/Yokomi_et_al.pdf.
Overview of Current Quarantines and Management of Citrus Pests in California -
Yokomi, R.K. 2012. Overview of Current Quarantines and Management of Citrus Pests in California. In: Proceedings of the American Society of Agronomy. 2012 Conference Proceedings, February 7-8, 2012, Visalia, California. p. 98-105. Available: http://calasa.ucdavis.edu/files/134945.pdf.
Validation and comparison of a hierarchal sampling plan for estimating incidence of citrus stubborn disease -
Yokomi, R.K., Sisterson, M.S. 2012. Validation and comparison of a hierarchal sampling plan for estimating incidence of citrus stubborn disease. International Organization of Citrus Virologists Proceedings. Available: http://www.ivia.es/iocv/archivos/Proceedings_XVIII_Conference/Yokomi_and_Sisterson.pdf.
Genetic differentiation and biology of Citrus tristeza virus populations spreading in California -
Yokomi, R., Saponari, M., Metheney, P., Vidalakis, G. 2011. Genetic differentiation and biology of Citrus tristeza virus populations spreading in California. In: Proceedings of the 18th Conference of the International Organizaion of Citrus Virologists. Available:http://iocv.org/proceedings/eighteen/Yokomi_et_al.pdf.
Calculation of diagnostic parameters of advanced serological and molecular tissue-print methods for detection of Citrus tristeza virus. A model for other plant pathogens -
Vidal, E., Yokomi, R.K., Moreno, A., Bertolini, E., Cambra, M. 2012. Calculation of diagnostic parameters of advanced serological and molecular tissue-print methods for detection of Citrus tristeza virus. A model for other plant pathogens. Phytopathology. 102:114-121.
Etiology, background, worldwide situation and control of Citrus Tristeza virus and its vectors -
Yokomi, R.K. 2011. Etiology, background, worldwide situation and control of Citrus Tristeza virus and its vectors. Symposium Proceedings. available: http://www.senasica.gob.mx/includes/asp/download.asp?iddocumento=24041&idu
Citrus stubborn disease (CSD) -
Yokomi, R.K. 2013. Citrus stubborn disease (CSD). Review Article. available: http://www.idtools.org/id/citrus/diseases
Citrus-CTV molecular interactions: What is the host side of the story? -
Doddapaneni, H., Saponari, M., Giampetruzzi, A., Loconsole, G., Saldarelli, P., Yokomi, R.K. 2011. Citrus-CTV molecular interactions: What is the host side of the story?. Phytopathology. 101:S43.
Molecular analysis among MCA13-reactive isolates reveals a rapid strategy for assessment of Citrus tristeza virus severity -
Yokomi, R.K., Saponari, M. 2011. Molecular analysis among MCA13-reactive isolates reveals a rapid strategy for assessment of Citrus tristeza virus severity. Acta Horticulturae. 892:251-256.
Estimation of Incidence and Spatial Temporal Distribution of Citrus Stubborn Disease -
Yokomi, R.K., Sisterson, M.S. 2010. Estimation of Incidence and Spatial Temporal Distribution of Citrus Stubborn Disease [abstract]. International Organization of Citrus Virologists Proceedings. 31:s53.
Current status of Citrus tristeza virus in Central California -
Yokomi, R.K., Metheney, P., Grafton-Cardwell, E., Stewart-Leslie, J. 2010. Current status of Citrus tristeza virus in Central California [abstract]. Conference of International Organization of Citrus Virologists. 31:s23.
Genetic differentiation and biology of Citrus tristeza virus populations spreading in eradicative and non-eradicative areas of California -
Yokomi, R.K., Saponari, M., Metheney, P., Vidalakis, G. 2010. Genetic differentiation and biology of Citrus tristeza virus populations spreading in eradicative and non-eradicative areas of California [abstract]. Conference of International Organization of Citrus Virologists. 31:s27.
Tissue-print real-time RT-PCR for accurate detection of Citrus tristeza virus. Validation and comparison with Tissue print-ELISA. -
Vidal, E., Yokomi, R.K., Moreno, A., Bertolini, E., Cambra, M. 2010. Tissue-print real-time RT-PCR for accurate detection of Citrus tristeza virus. Validation and comparison with Tissue print-ELISA [abstract]. International Organization of Citrus Virologists Proceedings. 31:s97.
Profiling of the small RNA populations derived from sour orange seedlings cross-protected against seedling yellows strains of Citrus tristeza virus -
Saponari, M., Doddapaneni, H., Loconsole, G., Giampetruzzi, A., Saldarelli, P., Yokomi, R.K. 2011. Profiling of the small RNA populations derived from sour orange seedlings cross-protected against seedling yellows strains of Citrus tristeza virus. Journal of Plant Pathology. 92(4):S4.71-105.
Studies of Seedling Yellows Amelioration of Citrus tristeza virus Strain Mixtures to Elucidate Mechanisms of Cross Protection -
Saponari, M., Doddapaneni, H., Loconsole, G., Giampetruzzi, A., Saldarelli, P., Yokomi, R.K. 2010. Studies of Seedling Yellows Amelioration of Citrus tristeza virus Strain Mixtures to Elucidate Mechanisms of Cross Protection [abstract]. International Organization of Citrus Virologists Proceedings. 31:s93.
Global Analyses of Small Interfering RNAs from Sour Orange seedlings Infected with Different Citrus tristeza virus Genotypes -
Saponari, M., Giampetruzzi, A., Doddapaneni, H., Loconsole, G., Xiong, Z., Saldarelli, P., Yokomi, R.K. 2010. Global Analyses of Small Interfering RNAs from Sour Orange seedlings Infected with Different Citrus tristeza virus Genotypes[abstract]. International Organization of Citrus Virologists Proceedings. 31:s64.
Plant-feeding insects harbor double-stranded RNA viruses encoding a novel proline-alanine rich protein and a polymerase distantly related to that of fungal viruses -
Spear, A., Sisterson, M.S., Yokomi, R.K., Stenger, D.C. 2010. Plant-feeding insects harbor double-stranded RNA viruses encoding a novel proline-alanine rich protein and a polymerase distantly related to that of fungal viruses. Virology. 404:304-311.
New Perspectives on the Epidemiology of Citrus Stubborn Disease in California Orchards -
Mello, A.F., Yokomi, R.K., Melcher, U., Chen, J., Civerolo, E.L., Wayadande, A., Fletcher, J. 2010. New Perspectives on the Epidemiology of Citrus Stubborn Disease in California Orchards. Plant Health Progress. Online publication,(DOI:10.1094/PHP-2010-0526-04-SY).
Novel double-stranded RNA viruses of plant-feeding insects encode a serine-alanine-proline rich protein and a polymerase distantly related to fungal viruses -
Spear, A., Sisterson, M.S., Yokomi, R.K., Stenger, D.C. 2010. Novel double-stranded RNA viruses of plant-feeding insects encode a serine-alanine-proline rich protein and a polymerase distantly related to fungal viruses. American Society for Virology Meeting Scientific Program. P.79.
First Report of “Candidatus Liberibacter asiaticus” Associated with Huanglongbing in Ethiopia -
De Bac, G., Saponari, M., Loconsole, G., Martelli, G., Yokomi, R.K., Catalano, L., Breithaupt, J. 2010. First Report of “Candidatus Liberibacter asiaticus” Associated with Huanglongbing in Ethiopia. Plant Disease 94(4):482.
Effect of Citrus Stubborn Disease on Navel Orange Production in a Commercial Orchard in California -
Mello, A.F., Yokomi, R.K., Payton, M.E., Fletcher, J. 2010. Effect of Citrus Stubborn Disease on Navel Orange Production in a Commercial Orchard in California. Journal of Plant Pathology. 92:429-438.
Rapid Differentiation and Identification of Potential Severe Strains of Citrus tristeza Virus by Real-Time Reverse Transcription Polymerase Chain Reaction Assays -
Yokomi, R.K., Saponari, M., Sieburth, P.J. 2010. Rapid Differentiation and Identification of Potential Severe Strains of Citrus tristeza Virus by Real-Time Reverse Transcription Polymerase Chain Reaction Assays. Phytopathology. 100:319-327.
Citrus Stubborn Severity is Associated with Spiroplasma Citri Titer but Not with Bacterial Genotype. -
Mello, A.F., Yokomi, R.K., Melcher, U., Chen, J., Fletcher, J. 2009. Citrus Stubborn Severity is Associated with Spiroplasma Citri Titer but Not with Bacterial Genotype. Plant Disease. 94:75-82.
Molecular Detection of Spiroplasma Citri Associated with Stubborn Disease in Citrus Orchards in Syria -
Kubaa, R., Saponari, M., Djelouah, K., Yokomi, R.K., El-Khateeb, A., Jamal, M. 2009. Molecular Detection of Spiroplasma Citri Associated with Stubborn Disease in Citrus Orchards in Syria. Arabian Journal of Plant Protection. 27(V57):93. Available: http://www.asplantprotection.org/PDF/AJPP/27-1_2009/AbstractBook-10th_Arab_Congress_of_Plant_Protection.pdf
Molecular Analysis Among MCA13-reactive Isolates Reveals a Strategy for Rapid Assessment of Citrus tristeza Virus Severity -
Yokomi, R.K., Saponari, M. 2009. Molecular analysis among MCA13-reactive isolates reveals a strategy for rapid assessment of citrus tristeza virus severity. Meeting Abstract. p. 112.
Transmission of different strains of Spiroplasma citri to carrot and citrus by Circulifer tenellus Baker (Hemiptera:Cicadellidae) -
Mello, A.F., Wayadande, A., Yokomi, R.K., Fletcher, J. 2009. Transmission of different strains of Spiroplasma citri to carrot and citrus by Circulifer tenellus Baker (Hemiptera:Cicadellidae). Journal of Economic Entomology. 102(4):1417-1422.
Genetic Diversity of Citrus tristeza Virus Isolates Collected Recently in California -
Yokomi, R.K., Saponari, M., Metheney, P., Polek, M., Vidalakis, G. 2009. Genetic Diversity of Citrus tristeza Virus Isolates Collected Recently in California. Phytopathology 99:S147.
Elevated Background in double antibody sandwich-indirect enzyme-linked immunosorbent assay for the detection of Citrus tristeza virus in mandarin cultivars -
Yokomi, R.K., Polek, M. 2011. Elevated Background in double antibody sandwich-indirect enzyme-linked immunosorbent assay for the detection of Citrus tristeza virus in mandarin cultivars. International Organization of Citrus Virologists Proceedings. p. 36-42.
Assessment of the Citrus tristeza virus isolates detected in spring 2007 at the Lindcove Research and Extension Center, Exeter, California -
Yokomi, R.K., Polek,, M., Grafton-Cardwell,, B., Vidalakis,, G., O'Connell,, N., Saponari,, M. 2011. Assessment of the Citrus tristeza virus isolates detected in spring 2007 at the Lindcove Research and Extension Center, Exeter, California. International Organization of Citrus Virologists Proceedings. p. 28-35.
Estimation of Citrus Stubborn Disease Incidence in Citrus Groves by real-time PCR -
Yokomi, R.K., Mello,, A.F., Fletcher,, J., Saponari,, M. 2011. Estimation of Citrus Stubborn Disease Incidence in Citrus Groves by real-time PCR. Conference of International Organization of Citrus Virologists. p.131-141.
Differential stylet penetration behaviors of two Aphis gossypii biotypes in relation to host or vector infection with Citrus tristeza virus Reprint Icon -
Gutierrez, J.D., Backus, E.A., Yokomi, R.K., Schreiber, F. 2008. Differential stylet penetration behaviors of two Aphis gossypii biotypes in relation to host or vector infection with Citrus tristeza virus. Entomological Society of America Annual Meeting. Paper No. 36418.
Assessment of Stubborn Disease Incidence in Citrus -
Mello, A.F., Yokomi, R.K., Fletcher, J. 2011. Assessment of Stubborn Disease Incidence in Citrus. In: Proceedings of the International Organization of Citrus Virologists. p. 123-130.
Genetic Diversity of Spiroplasma citri strains from Different Regions, Hosts, and Isolation Dates -
Mello, A.F., Yokomi, R.K., Mulcher, U., Chen, J., Wayadande, A., Fletcher, J. 2008. Genetic Diversity of Spiroplasma citri strains from Different Regions, Hosts, and Isolation Dates. Phytopathology. 98:960-968.
Genetic diversity of Citrus tristeza virus isolates spreading in Central California -
Yokomi, R.K., Polek,, M., Saponari,, M. 2008. Genetic diversity of Citrus tristeza virus isolates spreading in Central California. American Phytopathological Society Abstracts. 98:S178.
Citrus stubborn symptom severity and Spiroplasma citri location within the tress canopy -
Mello,, A.F., Yokomi, R.K., Payton,, M., Fletcher,, J. 2008. Citrus stubborn symptom severity and Spiroplasma citri location within the tress canopy. American Phytopathological Society Annual Meeting. 98:S104.
Use of the Coat Protein (CP) and minor CP Intergene Sequence to Discriminate Severe Strains of Citrus tristeza virus -
Saponari,, M., Yokomi, R.K. 2011. Use of the Coat Protein (CP) and minor CP Intergene Sequence to Discriminate Severe Strains of Citrus tristeza virus. In: Proceedings of the International Organization of Citrus Virologists. p.43-57.
Citrus stubborn disease incidence determined by quantitative real time PCR -
Yokomi, R.K., Mello,, A.F., Fletcher,, J. 2008. Citrus stubborn disease incidence determined by quantitative real time PCR. Journal of Plant Pathology 90 (2, Suppl.) S2.465.
Molecular analyses revealed genetic complexity in Citrus tristeza virus Dekopon isolate and its aphid-transmitted progeny -
Yokomi, R.K., Saponari,, M., Weng,, Z., Xiong,, Z. 2008. Molecular analyses revealed genetic complexity in Citrus tristeza virus Dekopon isolate and its aphid-transmitted progeny [abstract]. Journal of Plant Pathology 90(2, Suppl.),S2.314.
Transmission of Spiroplasma citri to Carrots by Circulifer tenellus -
Mello,, A.F., Yokomi, R.K., Chen, J., Wayadande,, A., Fletcher,, J. 2008. Transmission of Spiroplasma citri to Carrots by Circulifer tenellus. Journal of Plant Pathology 90(2, Suppl.), S2.463.
PCR-based Detection of Spiroplasma Citri Associated with Citrus Stubborn Disease -
Yokomi, R.K., Mello, A., Saponari, M., Fletcher, J. 2008. PCR-based detection of spiroplasma citri associated with citrus stubborn disease. Plant Disease. 92:253-260.
Quantitative Detection of Spiroplasma Citri by Real Time PCR -
Yokomi, R.K., Mello,, A.F., Fletcher,, J., Saponari, M. 2007. Quantitative Detection of Spiroplasma Citri by Real Time PCR. In: Proceedings of the 17th Conference International Organization of Citrus Virologists, October 22-26, 2007, Adana, Turkey. p. 172.
Elevated Background in DAS-I ELISA for the Detection of Citrus Tristeza Virus in Mandarin Varieties -
Yokomi, R.K., Polek,, M. 2007. Elevated Background in DAS-I ELISA for the Detection of Citrus Tristeza Virus in Mandarin Varieties. In: Proceedings of the 17th Conference International Organization of Citrus Virologists, October 22-26, 2007, Adana, Turkey. p. 66.
Rapid Assessment of the Citrus Tristeza Virus Isolates Detected in Spring 2007 at the Lindcove Research and Extension Center, Exeter, Calif. -
Yokomi, R.K., Polek,, M., Grafton-Cardwell,, B., O'Connell,, N. 2007. Rapid Assessment of the Citrus Tristeza Virus Isolates Detected in Spring 2007 at the Lindcove Research and Extension Center, Exeter, California. In: Proceedings of the 17th Conference of International Organization of Citrus Virologists, October 22-26, 2007, Adana, Turkey. p. 58.
Biological and Molecular Characterization of Two Virulent CTV Isolates Found in Central California -
Yokomi, R.K., Saponari,, M. 2007. Biological and Molecular Characterization of Two Virulent CTV Isolates Found in Central California. In: Proceedings of the 17th International Organization of Citrus Virologists. p. 71.
Characterization of Citrus Tristeza Virus Isolates by Single-strand Conformation Polymorphism Analysis of the Coat Protein Gene -
Saponari,, M., Yokomi, R.K. 2007. Characterization of Citrus Tristeza Virus Isolates by Single-strand Conformation Polymorphism Analysis of the Coat Protein Gene. In: Proceedings of the 17th International Organization of Citrus Virologists, October 22-26, 2007, Adana, Turkey. p. 139
Use of the CP and CPm Intergene Sequences to Discriminate CTV Strains -
Saponari,, M., Yokomi, R.K. 2007. Use of the CP and CPm Intergene Sequences to Discriminate CTV Strains. In: Proceedings of the 17th International Organization of Citrus Virologists, October 22-26, 2007, Adana, Turkey. p. 138.
Assessment of Stubborn Disease Incidence in Citrus -
Mello,, A.F., Yokomi, R.K., Fletcher,, J. 2007. Assessment of Stubborn Disease Incidence in Citrus. In: Proceedings of the 17th International Organization of Citrus Virologists, October 22-26, 2007, Adana, Turkey. p. 173.
Real-time RT-PCR assay for detection and differentiation of Citrus tristeza virus isolates -
Saponari,, M., Yokomi, R.K. 2007. Real-time RT-PCR assay for detection and differentiation of Citrus tristeza virus isolates. Journal of Plant Pathology 89 (3, supplement):S60.
Quantitative Detection of Citrus tristeza virus (CTV) in Citrus and Aphids by Real-time Reverse Transcription-PCR (TaqMan®) Reprint Icon -
Saponari, M., Keremane, M.L., Yokomi, R.K. 2008. Quantitative Detection of Citrus tristeza virus (CTV) in Citrus and Aphids by Real-time Reverse Transcription-PCR (TaqMan®). Journal of Virological Methods. 147:43-53.
PCR-based Detection of Spiroplasma citri Associated with Citrus Stubborn Disease -
Yokomi, R.K., Mello, A.F., Saponari, M., Fletcher, J. 2007. PCR-based Detection of Spiroplasma citri Associated with Citrus Stubborn Disease. Phytopathology. 97:S127.
Real-time RT-PCR Assay for Detection and Differentiation of Citrus Tristeza Virus Isolates -
Saponari, M., Yokomi, R.K. 2007. Real-time RT-PCR Assay for Detection and Differentiation of Citrus Tristeza Virus Isolates. Phytopathology. 97:S104.
Genetic Diversity of Spiroplasma citri Isolates from Different Geographical Regions, Plant Hosts, and Dates of Isolations -
Mello, A.F., Yokomi, R.K., Melcher, U., Chen, J., Fletcher, J. 2007. Genetic Diversity of Spiroplasma citri Isolates from Different Geographical Regions, Plant Hosts, and Dates of Isolations. Phytopathology. 97:S75.
Spiroplasma citri Infection Affects Yield and Fruit Quality in Commercial Citrus Grove in California -
Mello, A.F., Fletcher, J., Yokomi, R.K. 2007. Spiroplasma citri Infection Affects Yield and Fruit Quality in Commercial Citrus Grove in California. Phytopathology. 97:S74.
MOLECULAR TECHNIQUES TO ASSESS GENETIC DIVERSITY AMONG ISOLATES OF SPIROPLASMA CITRI. -
Mello, A.F.S., Yokomi, R.K., Melcher, U., Chen, J.C., Fletcher. J. 2006. Molecular techniques to assess genetic diversity among isolates of Spiroplasma citri [abstract]. 16th International Congress International Organization for Mycoplasmology (IOM), St John's College Cambridge, UK, July 9-14, 2006.
IDENTIFICATION OF INFECTION LOCI OF SPIROPLASMA CITRI IN THE SAN JOAQUIN VALLEY. -
Yokomi, R.K., Mello, A., Fletcher, J., Chen, J.C. 2006. Identification of infection loci of Spiroplasma citri in the San Joaquin Valley. Phytopathology 97:S172. APS Net. 2006 Pacific Division Meeting Abstracts, June 13-16, 2006 - Boise, ID. Posted online Oct. 2, 2006. http://www.apsnet.org/ meetings/div/pc06abs.asp.
ASSESSMENT OF GENETIC DIVERSITY IN SPIROPLASMA CITRI BY RAPD, REP-PCR AND BACTERIOPHAGE PRIMERS -
Mello, A.F., Yokomi, R.K., Melcher, U., Chen, J., Fletcher, J. 2006. Assessment of Genetic Diversity in Spiroplasma citri by RAPD, rep-PCR and Bacteriophage Primers. Meeting Abstract. Phytopathology 96:S77
MULTIPLEX TAQMAN-BASED PCR FOR SENSITIVE AND ACCURATE QUANTIFICATION OF CITRUS HLB AND CVC PATHOGENS; CANDIDATUS LIBERIBACTER AND XYLELLA FASTIDIOSA -
Lin, H., Doddapaneni, H., Civerolo, E.L., Yao, J., Yokomi, R.K., Bai, X., Cao, H., Zhao, X., Wen, R. 2006. Multiplex taqman-based pcr for sensitive and accurate quantification of citrus hlb and cvc pathogens; candidatus liberibacter and xylella fastidiosa [Abstract]. Proceedings of the Huanglongbing-greening International Workshop. p. 83.
INITIAL SURVEY FOR SPIROPLASMA CITRI, A LEAFHOPPER-TRANSMITTED PATHOGEN INFECTING CITRUS AND OTHER CROPS IN CENTRAL CALIFORNIA. -
Yokomi, R.K., Mello, A., Kallsen, C., Nunez, J., Gorden, J., O’Connell, N., Freeman, M., Chen, J.C., Fletcher, J. 2006. Initial survey for Spiroplasma citri, a leafhopper-transmitted pathogen infecting citrus and other crops in central California [abstract]. In: Abstracts 90th Annual Meeting Pacific Branch ESA, Maui, Hawaii, March 5-8, 2006. p.108-109.
TRANSMISSION AND SPREAD OF CITRUS TRISTEZA VIRUS IN CENTRAL CALIFORNIA. -
Yokomi, R.K., Polek, M., Gumpf, D.J. 2010. TRANSMISSION AND SPREAD OF CITRUS TRISTEZA VIRUS IN CENTRAL CALIFORNIA. In: Karasev, A.V., and M.E. Hilf, editors. Citrus Tristeza Virus Complex and Tristeza Diseases. APS Press, St. Paul, MN. p. 151-165.
BIOLOGICAL CHARACTERIZATION OF AN INTERNATIONAL COLLECTION OF CITRUS TRISTEZA VIRUS (CTV) ISOLATES -
BIOCHARCTERIZATION OF AN INTERNATIONAL COLLECTION OF CITRUS TRISTEZA VIRUS (CTV) ISOLATES. -
INCIDENCE, TRANSMISSIBILITY, AND GENOTYPE OF CITRUS TRISTEZA VIRUS (CTV) ISOLATES FROM A CTV ERADICATIVE AND A NON-ERADICATIVE DISTRICT IN CENTRAL CALIFORNIA -
Yokomi, R.K., Deborde, R.L. 2005. Incidence, transmissibility, and genotype of citrus tristeza virus (CTV) isolates from a CTV eradicative and a non-eradicative district in central california. Plant Disease. 89(8):859-866.
AMINO ACID SEQUENCE VARIATIONS ASSOICATED WITH APHID TRANSMISSIBILITY OF CITRUS TRISTEZA VIRUS. -
Roy, G., Yokomi, R.K., Ullman, D. 2005. Amino acid sequence variations assoicated with aphid transmissibility of citrus tristeza virus.[Abstract]. Phytopathology. 95:S91.
TRANSMISSION PROFILES OF CALIFORNIA CITRUS TRISTEZA VIRUS ISOLATES BY THE COTTON APHID, APHIS GOSSYPII (HOMOPTERA: APHIDIDAE). -
Yokomi, R.K. 2005. Transmission profiles of California Citrus tristeza virus isolates by the cotton aphid, Aphis gossypii (homoptera: aphididae). Entomology Society of America Pacific Branch 89th Annual Meeting. p.103
BIOCHARACTERIZATION OF AN INTERNATIONAL COLLECTION OF CITRUS TRISTEZA VIRUS (CTV) ISOLATES -
Garnsey, S.M., Civerolo, E.L., Gumpf, D.J., Paul, C., Hilf, M.E., Lee, R.F., Brlanskyr, R.H., Yokomi, R.K., Hartung, J.S. 2004. Biocharacterization of an international collection of citrus tristeza virus (CTR) isolates. International Organization of Citrus Virologists Abstracts, Page 49.
BIOLOGICAL CHARACTERIZATION OF AN INTERNATIONAL COLLECTION OF CITRUS TRISTEZA VIRUS (CTV)ISOLATES -
Garnsey, S.M., Civerolo, E.L., Gumpf, D.J., Paul, C., Hilf, M.E., Lee, R.F., Brlansky, R.H., Yokomi, R.K., Hartung, J.S. 2007. Biological characterization of an international collection of citrus tristeza virus (ctv)isolates. In: Proceedings of Conference of International Organization of Citrus Virologists. p. 75-93.
PRELIMINARY EVALUATION OF TWO BIOTYPES OF APHIS GOSSYPII ON THE TRANSMISSION OF CITRUS TRISTEZA VIRUS. -
Yokomi, R.K., Joost, J.H., Backus, E.A. 2004. Preliminary evaluation of two biotypes of aphis gossypii on the transmission of citrus tristeza virus. [Abstract] Conference of International Organization of Citrus Virologists. p.136.
TRANSMISSIBILITY AND GENOTYPE ANALYSIS OF CENTRAL CALIFORNIA ISOLATES OF CITRUS TRISTEZA CLOSTEROVIRUS -
Yokomi, R.K. 2004. Transmissibility and genotype analysis of Central California isolates of Citrus tristeza closterovirus. Phytopathology 94:S-131.
APHELINUS DALMAN (1820) -
CITRUS TRISTEZA VIRUS -
TOXOPTERA CITRICIDA -
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