Skip to main content
ARS Home » Pacific West Area » Parlier, California » San Joaquin Valley Agricultural Sciences Center » Crop Diseases, Pests and Genetics Research » People & Locations » Christopher Wallis
Christopher Wallis (PhD)
Crop Diseases, Pests and Genetics Research
Research Plant Pathologist

Phone: (559) 596-2805
Fax: (559) 596-2921

9611 S. RIVERBEND AVE.
PARLIER, CA 93648

(Employee information on this page comes from the REE Directory. Please contact your front office staff to update the REE Directory.)

Projects
Development of Applied Management Systems for Diseases of Perennial Crops with Emphasis on Vector-Borne Pathogens of Grapevine and Citrus
In-House Appropriated (D)
  Accession Number: 441572
Identifying Vulnerabilities in Vector-host-pathogen Interactions of Grapevine and Citrus Pathosystems to Advance Sustainable Management Strategies
In-House Appropriated (D)
  Accession Number: 442038
Identification of Novel Central Valley Trichoderma Isolates for Biological Control of Pierce’s Disease in California
Reimbursable Cooperative Agreement (R)
  Accession Number: 442782
Pilot Citrus Breeding Research Project at the USDA-ARS San Joaquin Valley Agricultural Sciences Center in Parlier, CA
Reimbursable Cooperative Agreement (R)
  Accession Number: 441099
Identification of Novel Central Valley Insect-Attacking Fungi for Biocontrol of Glassy-Winged Sharpshooter and Vine Mealybug
Trust Fund Cooperative Agreement (T)
  Accession Number: 443900

Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Top-down proteomic identification of protein biomarkers of Xylella fastidiosa subsp. fastidiosa using MALDI-TOF-TOF-MS and MS/MS Reprint Icon - (Peer Reviewed Journal)
Fagerquist, C.K., Wallis, C.M., Chen, J. 2023. Top-down proteomic identification of protein biomarkers of Xylella fastidiosa subsp. fastidiosa using MALDI-TOF-TOF-MS and MS/MS. International Journal of Mass Spectrometry. 489. Article 117051. https://doi.org/10.1016/j.ijms.2023.117051.
Exploring potential induction of grapevine (Vitis spp.) root phenolic compounds by ring nematodes, Mesocriconema xenoplax Reprint Icon - (Peer Reviewed Journal)
Wallis, C.M. 2022. Exploring potential induction of grapevine (Vitis spp.) root phenolic compounds by ring nematodes, Mesocriconema xenoplax. BMC Research Notes. 15:375. https://doi.org/10.1186/s13104-022-06262-2.
Glassy-winged sharpshooters cease feeding and avoid plants treated with sub-lethal doses of the neonicotinoid insecticide imidacloprid Reprint Icon - (Peer Reviewed Journal)
Sisterson, M.S., Uchima, S.Y., Wallis, C.M., Krugner, R. 2022. Glassy-winged sharpshooters cease feeding and avoid plants treated with sub-lethal doses of the neonicotinoid insecticide imidacloprid. Journal of Economic Entomology. 116(1):240-248. https://doi.org/10.1093/jee/toac201.
Mixed infections of fungal trunk pathogens and induced systemic phenolic compound production in grapevines Reprint Icon - (Peer Reviewed Journal)
Wallis, C.M., Gorman, Z.J., Galarneau, E.R., Baumgartner, K. 2022. Mixed infections of fungal trunk pathogens and induced systemic phenolic compound production in grapevines. Frontiers in Fungal Biology. 3. Article 1001143. https://doi.org/10.3389/ffunb.2022.1001143.
Microplate bioassay to examine the effects of grapevine-isolated stilbenoids on survival of root knot nematodes Reprint Icon - (Peer Reviewed Journal)
Wallis, C.M. 2022. Microplate bioassay to examine the effects of grapevine-isolated stilbenoids on survival of root knot nematodes. BMC Research Notes. 15. Article 220. https://doi.org/10.1186/s13104-022-06106-z.
Identification of protein biomarkers of Xylella fastidiosa using MALDI-TOF-TOF-MS/MS and top-down proteomic analysis - (Proceedings)
Fagerquist, C.K., Wallis, C.M., Chen, J. 2022. Identification of protein biomarkers of Xylella fastidiosa using MALDI-TOF-TOF-MS/MS and top-down proteomic analysis. Proceedings of the ASMS Conference on Mass Spectrometry and Allied Topics. ID 310588.
Potential effects of Grapevine leafroll-associated virus 3 or Grapevine red blotch virus infection on foliar phenolic and amino acid levels Reprint Icon - (Peer Reviewed Journal)
Wallis, C.M. 2022. Potential effects of Grapevine leafroll-associated virus 3 or Grapevine red blotch virus infection on foliar phenolic and amino acid levels. BMC Research Notes. 15. Article 213. https://doi.org/10.1186/s13104-022-06104-1.
Current research to control agricultural pests and disease vectors at the USDA-ARS San Joaquin Valley Agricultural Sciences Center - (Abstract Only)
Amino acid, sugar, phenolic, and terpenoid profiles are capable of distinguishing Citrus tristeza virus infection status in citrus cultivars: Grapefruit, lemon, mandarin, and sweet orange Reprint Icon - (Peer Reviewed Journal)
Wallis, C.M., Gorman, Z.J., Rattner, R., Hajeri, S., Yokomi, R.K. 2022. Amino acid, sugar, phenolic, and terpenoid profiles are capable of distinguishing Citrus tristeza virus infection status in citrus cultivars: Grapefruit, lemon, mandarin, and sweet orange. PLoS ONE. 17(5) Article e0268255. https://doi.org/10.1371/journal.pone.0268255.
A comprehensive review of zebra chip disease in potato and its management through breeding for resistance/tolerance to 'Candidatus Liberibacter solanacearum' and its insect vector Reprint Icon - (Review Article)
Prager, S., Cohen, A., Cooper, W.R., Novy, R.G., Rashed, A., Wenninger, E., Wallis, C.M. 2022. A comprehensive review of zebra chip disease in potato and its management through breeding for resistance/tolerance to 'Candidatus Liberibacter solanacearum' and its insect vector. Pest Management Science. 78:3731-3745. https://doi.org/10.1002/ps.6913.
Identification of protein biomarkers of Xylella fastidiosa using MALDI-TOF-TOF-MS/MS and top-down proteomic analysis - (Abstract Only)
Insights regarding resistance of ‘Nemaguard’ rootstock to the bacterium Xylella fastidiosa Reprint Icon - (Peer Reviewed Journal)
Krugner, R., Rogers, E.E., Burbank, L.P., Wallis, C.M., Ledbetter, C.A. 2022. Insights regarding resistance of ‘Nemaguard’ rootstock to the bacterium Xylella fastidiosa. Plant Disease. 106(8):2074-2081. https://doi.org/10.1094/PDIS-01-22-0136-RE.
Isolation and characterization of grapevine Trichoderma spp. for biological control of vineyard diseases - (Proceedings)
Wallis, C.M., Gorman, Z.J., Chen, J. 2021. Isolation and characterization of grapevine Trichoderma spp. for biological control of vineyard diseases. CDFA Pierce's Disease Control Program Research Symposium. p.123.
Monitoring vine mealybug resistance to imidacloprid - (Proceedings)
Sisterson, M.S., Burbank, L.P., Naegele, R.P., Wallis, C.M. 2021. Monitoring vine mealybug resistance to imidaclopridIn, Symposium Proceedings: Pierce’s Disease and Other Designated Pests and Diseases of Winegrape, pp. 366.
Mitochondrial genome resource of a grapevine strain of Trichoderma harzianum, a potential biological control agent for fungal canker diseases Reprint Icon - (Peer Reviewed Journal)
Wallis, C.M., Chen, J., Perez de Leon, A.A. 2022. Mitochondrial genome resource of a grapevine strain of Trichoderma harzianum, a potential biological control agent for fungal canker diseases. Phytofrontiers. 2(2):143-146. https://doi.org/10.1094/PHYTOFR-08-21-0052-A.
Characterization of grapevine fungal canker pathogens using fatty acid methyl ester (FAME) profiles Reprint Icon - (Peer Reviewed Journal)
Wallis, C.M., Lawrence, D., Travadon, R., Baumgartner, K. 2021. Characterization of grapevine fungal canker pathogens using fatty acid methyl ester (FAME) profiles. Mycologia. 114(1):203-213. https://doi.org/10.1080/00275514.2021.1983396.
Host metabolomic responses to CTV infection - (Abstract Only)
Wallis, C.M., Rattner, R., Gorman, Z., Hajeri, S., Yokomi, R.K. 2021. Host metabolomic responses to CTV infection. Meeting Abstract. Proceedings of the 2021 Citrus Research Conference.
Testing and utilization of grapevine-isolated Trichoderma spp. for improved control of grapevine trunk diseases Reprint Icon - (Abstract Only)
Wallis, C.M. 2021. Testing and utilization of grapevine-isolated Trichoderma spp. for improved control of grapevine trunk diseases. American Phytopathological Society Abstracts. 111. https://doi.org/10.1094/PHYTO-111-10-S2.1.
Nutritional niche overlap analysis as a method to identify potential biocontrol fungi against trunk pathogens Reprint Icon - (Peer Reviewed Journal)
Wallis, C.M. 2021. Nutritional niche overlap analysis as a method to identify potential biocontrol fungi against trunk pathogens. Biocontrol. 66:559-571. https://doi.org/10.1007/s10526-021-10091-w.
A comparison of the metabolomic response of grapevine to infection with Ascomycete wood-infecting fungi - (Peer Reviewed Journal)
Phenolic compound induction in plant-microbe and plant-insect interactions: a meta-analysis Reprint Icon - (Peer Reviewed Journal)
Wallis, C.M., Galameau, E. 2020. Phenolic compound induction in plant-microbe and plant-insect interactions: a meta-analysis. Frontiers in Plant Science. 11:580753. https://doi.org/10.3389/fpls.2020.580753.
Grapevine phenolic compounds influence cell surface adhesion of Xylella fastidiosa and bind to lipopolysaccharide Reprint Icon - (Peer Reviewed Journal)
Lee, S.A., Burbank, L.P., Wallis, C.M., Rogers, E.E. 2020. Grapevine phenolic compounds influence cell surface adhesion of Xylella fastidiosa and bind to lipopolysaccharide. PLoS ONE. 15(10):e0240101. https://doi.org/10.1371/journal.pone.0240101.
Role of phenolic compounds in imparting tolerance to Xylella fastidiosa in Pierce’s disease susceptible and resistant grapevines Reprint Icon - (Peer Reviewed Journal)
Wallis, C.M., Zeilinger, A.R., Sicard, A., Beal, D., Walker, A., Almeida, R.P. 2020. Role of phenolic compounds in imparting tolerance to Xylella fastidiosa in Pierce’s disease susceptible and resistant grapevines. PLoS One. 15(8):e0237545. https://doi.org/10.1371/journal.pone.0237545.
Determining roles of grapevine (Vitis spp.) stilbenoids on providing host resistance to root knot nematodes, Meloidogyne incognita Reprint Icon - (Peer Reviewed Journal)
Wallis, C.M. 2020. Determining roles of grapevine (Vitis spp.) stilbenoids on providing host resistance to root knot nematodes, Meloidogyne incognita. BMC Research Notes. 13:360. https://doi.org/10.1186/s13104-020-05201-3.
Non-linear dynamics of vector transmission of a plant pathogen: a test of theory and application to disease management Reprint Icon - (Peer Reviewed Journal)
Zeilinger, A.R., Wallis, C.M., Beal, D., Sicard, A., Walker, M., Almeida, R.P. 2021. Non-linear dynamics of vector transmission of a plant pathogen: a test of theory and application to disease management. Ecosphere. 12(5):e03505. https://doi.org/10.1002/ecs2.3505.
Phenotype microarray profiling to characterize differences between Xylella fastidiosa subspecies Reprint Icon - (Abstract Only)
Wallis, C.M. 2020. Phenotype microarray profiling to characterize differences between Xylella fastidiosa subspecies. American Phytopathological Society Abstracts. 110:S2.16. https://doi.org/10.1094/PHYTO-110-12-S2.1.
Metabolomic characterization of walnut bark and effects of methanolic extracts on walnut twig beetle feeding behavior Reprint Icon - (Abstract Only)
Simmons, J.D., Wallis, C.M., Seybold, S.J., Bostock, R.M. 2020. Metabolomic characterization of walnut bark and effects of methanolic extracts on walnut twig beetle feeding behavior. American Phytopathological Society Abstracts. 110:S2.17. https://doi.org/10.1094/PHYTO-110-12-S2.1.
Dust interferes with pollen-stigma interaction and fruit set in pistachio Pistacia vera cv. Kerman Reprint Icon - (Peer Reviewed Journal)
Zhang, L., Banuelos, G.S., Wallis, C.M., Beede, R.H., Ferguson, L. 2019. Dust interferes with pollen-stigma interaction and fruit set in pistachio Pistacia vera cv. Kerman. HortScience. 54(11):1967-1971. https://doi.org/10.21273/HORTSCI14330-19.
Concentrations of sunflower phenolics appear insufficient to explain resistance to floret- and seed-feeding caterpillars Reprint Icon - (Peer Reviewed Journal)
Prasifka, J.R., Wallis, C.M. 2019. Concentrations of sunflower phenolics appear insufficient to explain resistance to floret- and seed-feeding caterpillars. Arthropod-Plant Interactions. 13:915-921. https://doi.org/10.1007/s11829-019-09706-y.
Proteome and metabolome analyses reveal differential responses in tomato-Verticillium dahliae-interactions Reprint Icon - (Peer Reviewed Journal)
Hu, X., Puri, K.D., Gurung, S., Klosterman, S.J., Wallis, C.M., Britton, M., Durbin-Johnson, B., Phinney, B., Salemi, M., Short, D.P.G., Subbarao, K.V. 2019. Proteome and metabolome analyses reveal differential responses in tomato-Verticillium dahliae-interactions. Journal of Proteomics. 207:103449. https://doi.org/10.1016/j.jprot.2019.103449.
Exploring the role of phenolic and terpenoid compounds in grapevine defense against pathogens and insects - (Abstract Only)
Wallis, C.M. 2019. Exploring the role of phenolic and terpenoid compounds in grapevine defense against pathogens and insects. Proceedings of the 258th American Chemical Society National Meeting and Exposition, Aug 25-29, 2019, San Diego, CA. Available: https://www.morressier.com/article/exploring-role-phenolic-terpenoid-compounds-grapevine-defense-against-pathogens-insects/5fc645232d78d1fec4675de4?.
Characterization and detection of grapevine fungal pathogens using Fatty Acid Methyl Ester analyses (FAME) - (Abstract Only)
Wallis, C.M. 2019. Characterization and detection of grapevine fungal pathogens using fatty acid Methyl Ester analyses (FAME). International Workshop on Grapevine Trunk Diseases. p. 43.
Two infections, one grapevine: How infection by one pathogen may impact that of a second pathogen via induced changes in host physiology - (Abstract Only)
Wallis, C.M., Baumgartner, K., Galarneau, E. 2019. Two infections, one grapevine: How infection by one pathogen may impact that of a second pathogen via induced changes in host physiology. International Workshop on Grapevine Trunk Diseases. p. 58.
Zebra chip development during storage: cause for concern? - (Trade Journal)
Wallis, C.M., Rashed, A. 2018. Zebra chip development during storage: cause for concern?. Spudman. 56:26-27.
Fatty Acid Methyl Ester (FAME) analyses for characterization and detection of grapevine pathogens - (Abstract Only)
NMR solution structures and MD-simulation of procyanidin B1, B2, and C1 - (Peer Reviewed Journal)
Watson, A., Wallis, C.M., Franz, A.H. 2018. NMR solution structures and MD-simulation of procyanidin B1, B2, and C1. Archives for Organic Chemistry (ARKIVOC). 2018:279-301.
Population diversity of Diaphorina citri (Hemiptera: Liviidae) in China based on whole mitochondrial genome sequences Reprint Icon - (Peer Reviewed Journal)
Wu, F., Jiang, H., Andrew, B., Holford, P., Chen, J., Wallis, C.M., Zheng, Z., Deng, X., Cen, Y. 2018. Population diversity of Diaphorina citri (Hemiptera: Liviidae) in China based on whole mitochondrial genome sequences. Pest Management Science. https://doi.org/10.1002/ps.5044.
Desert plant for saline and drought stricken farmland: Assessment of Opuntia cactus nutritional characteristics - (Peer Reviewed Journal)
Centofanti, T., Banuelos, G.S., Zambrano, M.C., Wallis, C.M. 2018. Desert plant for saline and drought stricken farmland: Assessment of Opuntia cactus nutritional characteristics. Journal of Environment and Bio Research. 1(1):1-8. https://www.researchgate.net/publication/321310216.
Working towards developing potato tolerance of zebra chip disease: a food science perspective - (Trade Journal)
Wallis, C.M., Trumble, J.T. 2018. Working towards developing potato tolerance of zebra chip disease: a food science perspective. Potato Grower. 47:78-79.
Effects of energy reserves and diet on glassy-winged sharpshooter egg maturation - (Peer Reviewed Journal)
Sisterson, M.S., Krugner, R., Wallis, C.M., Stenger, D.C. 2018. Effects of energy reserves and diet on glassy-winged sharpshooter egg maturation. Journal of Economic Entomology. 111:159-169.
Postharvest development of ‘Candidatus Liberibacter solanacearum’ in late-season infected potato tubers under commercial storage conditions Reprint Icon - (Peer Reviewed Journal)
Rashed, A., Olsen, N., Wallis, C.M., Paetzold, L., Woodell, L., Rashidi, M., Workneh, F., Rush, C. 2017. Postharvest development of ‘Candidatus Liberibacter solanacearum’ in late-season infected potato tubers under commercial storage conditions. Plant Disease. 102(3):561-568. https://doi.org/10.1094/PDIS-05-17-0619-RE.
Association of promising germplasm exhibiting tolerance to psyllids, aphids, and zebra chip disease with foliar host chemistry - (Peer Reviewed Journal)
Prager, S.M., Wallis, C.M., Jones, M., Novy, R.G., Trumble, J. 2018. Association of promising germplasm exhibiting tolerance to psyllids, aphids, and zebra chip disease with foliar host chemistry. Journal of Economic Entomology. 111:327-336.
Characterization of host plant resistance to zebra chip disease from species-derived potato genotypes and the identification of new sources of zebra chip resistance - (Peer Reviewed Journal)
Mahnaz, R., Novy, R.G., Wallis, C.M., Rashed, A. 2017. Characterization of host plant resistance to zebra chip disease from species-derived potato genotypes and the identification of new sources of zebra chip resistance. Phytopathology. 12(8): e0183283.
Analyses of mitogenome sequences revealed that Asian citrus psyllid (Diaphorina citri) from California was related to those from Florida but different from those in Southern China Reprint Icon - (Peer Reviewed Journal)
Wu, F., Kumagai, L.B., Cen, Y., Chen, J., Wallis, C.M., Polek, M., Jiang, H., Liang, G., Deng, X. 2017. Analyses of mitogenome sequences revealed that Asian citrus psyllid (Diaphorina citri) from California was related to those from Florida but different from those in Southern China. Scientific Reports. 7:10154. https://doi.org/10.1038/s41598-017-10713-3.
Fruit quality of pomegranate grown in arid environment and irrigated with saline water Reprint Icon - (Peer Reviewed Journal)
Centofanti, T., Banuelos, G.S., Wallis, C.M. 2017. Fruit quality of pomegranate grown in arid environment and irrigated with saline water. Sustainable Water Resources Management. 1-14. https://doi.org/10.1007/s40899-017-0191-7.
Correlation of EPG waveforms from Lygus lineolaris feeding on cotton squares and chemical evidence of inducible tannins - (Peer Reviewed Journal)
Cervantes, F.A., Backus, E.A., Godfrey, L., Wallis, C.M., Akbar, W., Clark, T., Rojas, M.G. 2017. Correlation of EPG waveforms from Lygus lineolaris feeding on cotton squares and chemical evidence of inducible tannins. Annals of the Entomological Society of America. 110:2068-2075.
Neofusicoccum parvum colonization of the grapevine woody stem triggers asynchronous host responses at the site of infection and in the leaves Reprint Icon - (Peer Reviewed Journal)
Massonnet, M., Galarneau, E.R., Figueroa-Balderas, R., Lawrence, D.P., Miki, S., Sun, Q., Wallis, C.M., Baumgartner, K., Cantu, D. 2017. Neofusicoccum parvum colonization of the grapevine woody stem triggers asynchronous host responses at the site of infection and in the leaves. Frontiers in Plant Science. 8:1117. https://doi.org/10.3389/fpls.2017.01117.
Researchers and stakeholders shape advances in management of tree and vine trunk-disease complexes - (Abstract Only)
Comparing root knot nematode (Meloidogyne spp.) effects on tomato (Solanum lycopersicum) and grapevine (Vitis spp.) metabolic profiles - (Abstract Only)
Wallis, C.M. 2017. Comparing root knot nematode (Meloidogyne spp.) effects on tomato (Solanum lycopersicum) and grapevine (Vitis spp.) metabolic profiles. American Phytopathological Society Abstracts. 105:S1.119.
Effects of xylem-sap composition on glassy-winged sharpshooter egg maturation on high and low quality host plants - (Peer Reviewed Journal)
Sisterson, M.S., Wallis, C.M., Stenger, D.C. 2017. Effects of xylem-sap composition on glassy-winged sharpshooter egg maturation on high and low quality host plants. Environmental Entomology. 46:299-310.
Effects of ‘Candidatus Liberibacter solanacearum’ infections on potato (Solanum tuberosum L.) tuber physiology when kept at different temperatures - (Peer Reviewed Journal)
Wallis, C.M., Rashed, A., Workneh, F., Paetzold, L., Rush, C. 2017. Effects of ‘Candidatus Liberibacter solanacearum’ infections on potato (Solanum tuberosum L.) tuber physiology when kept at different temperatures. American Journal of Potato Research. doi: 10.1007/s12230-017-9569-1.
Characterization of the resistance against zebra chip in tubers of advanced potato lines from Mexico - (Peer Reviewed Journal)
Rubio-Covarrubias, O.A., Cadena-Hinojosa, M., Prager, S.M., Wallis, C.M., Trumble, J.T. 2017. Characterization of the resistance against zebra chip in tubers of advanced potato lines from Mexico. American Journal of Potato Research. doi: 10.1007/s12230-017-9570-9.
Deficit irrigation strategies and their impact on yield and nutritional quality of pomegranate fruit - (Peer Reviewed Journal)
Centofanti, T., Banuelos, G.S., Wallis, C.M., Ayars, J.E. 2017. Deficit irrigation strategies and their impact on yield and nutritional quality of pomegranate fruit. Fruits. 72(1):46-53. doi: 10.17660/th.2017/72.1.5.
Study the taxonomy of Xylella based on whole genome sequences - (Abstract Only)
Chen, J., Van Horn, C., Wallis, C.M. 2016. Study the taxonomy of Xylella based on whole genome sequences. CDFA Pierce's Disease Control Program Research Symposium. p. 189.
Grapevines respond to glassy-winged sharpshooter (Homalodisca vitripennis) oviposition by increasing local and systemic terpenoid levels - (Abstract Only)
Wallis, C.M., Krugner, R. 2016. Grapevines respond to glassy-winged sharpshooter (Homalodisca vitripennis) oviposition by increasing local and systemic terpenoid levels. Meeting Abstract. p. 238.
Effects of grapevine red blotch-associated virus (GRBaV) infection on foliar metabolism of grapevines - (Peer Reviewed Journal)
Wallis, C.M., Sudarshana, M.R. 2016. Effects of grapevine red blotch-associated virus (GRBaV) infection on foliar metabolism of grapevines. Canadian Journal of Plant Pathology. 38:358-366.
Host colonization and substrate utilization by wood-colonizing Ascomycete fungi in the grapevine trunk disease complex - (Abstract Only)
Galarneau, E.R., Wallis, C.M., Baumgartner, K. 2016. Host colonization and substrate utilization by wood-colonizing Ascomycete fungi in the grapevine trunk disease complex. American Phytopathological Society Abstracts. 46-P.
Root knot nematode effects on metabolic profiles of susceptible and resistant grapevine rootstocks - (Abstract Only)
Wallis, C.M. 2016. Root knot nematode effects on metabolic profiles of susceptible and resistant grapevine rootstocks. American Phytopathological Society Abstracts. 106:S4.37.
The complete mitochondrial genome sequence of Bactericera cockerelli and its comparison with three other psylloidea species - (Peer Reviewed Journal)
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.
Evaluation of assembling methods on determination of whole genome sequence of Xylella fastidiosa blueberry bacterial leaf scorch strain - (Abstract Only)
Chen, J., Wallis, C.M., Chang, C. 2016. Evaluation of assembling methods on determination of whole genome sequence of Xylella fastidiosa blueberry bacterial leaf scorch strain. American Phytopathological Society Abstracts. 106:S4.27.
Variations in Zebra Chip disease expression and tuber biochemistry in response to vector density - (Peer Reviewed Journal)
Rashed, A., Wallis, C.M., Workneh, F., Paetzold, L., Rush, C. 2016. Variations in Zebra Chip disease expression and tuber biochemistry in response to vector density. Phytopathology. 106(8):854-860. doi: 10.1094/PHYTO-01-16-0026-R.
Egg maturation by the glassy-winged sharpshooter (Hemiptera: Cicadellidae); a vector of Xylella fastidiosa - (Abstract Only)
Sisterson, M.S., Wallis, C.M., Krugner, R., Stenger, D.C. 2016. Egg maturation by the glassy-winged sharpshooter (Hemiptera: Cicadellidae); a vector of Xylella fastidiosa. International Congress of Entomology. Available: https://esa.confex.com/esa/ice2016/meetingapp.cgi/Paper/111154.
Characterization of different Californian strains of Xylella fastidiosa by fatty acid methyl ester (FAME) analyses - (Abstract Only)
Wallis, C.M., Chen, J. 2015. Characterization of different Californian strains of Xylella fastidiosa by fatty acid methyl ester (FAME) analyses. In: Esser T, Randhawa R, eds. Research Progress Reports: Pierce's disease and other designated pests and diseases of winegrapes, December, 2015. California Department of Food and Agriculture, Sacramento, CA. p. 251.
Whole genome sequence analyses of Xylella fastidiosa PD strains from different geographical regions - (Abstract Only)
Chen, J., Wallis, C.M. 2015. Whole genome sequence analyses of Xylella fastidiosa PD strains from different geographical regions. In: Esser T, Randhawa R, eds. Research Progress Reports: Pierce's disease and other designated pests and diseases of winegrapes, December, 2015. California Department of Food and Agriculture, Sacramento CA. p. 249.
Draft genome sequence of “Candidatus Liberibacter solanacearum” from a single potato psyllid in California - (Peer Reviewed Journal)
Wu, F., Deng, X., Liang, G., Wallis, C.M., Trumble, J., Prager, S., Chen, J. 2015. Draft genome sequence of “Candidatus Liberibacter solanacearum” from a single potato psyllid in California. Genome Announcements. 3(6)e01500-15.
Glassy-winged sharpshooter oviposition effects on foliar grapevine and red-tipped photinia terpenoid levels - (Abstract Only)
Pedraza, J.J., Wallis, C.M., Krugner, R. 2015. Glassy-winged sharpshooter oviposition effects on foliar grapevine and red-tipped photinia terpenoid levels. Entomological Society of America Annual Meeting. p. 139.
'Candidatus Liberibacter solanacearum' titers in and infection effects on potato tuber chemistry of promising germplasm exhibiting tolerance to zebra chip disease - (Peer Reviewed Journal)
Wallis, C.M., Munyaneza, J.E., Chen, J., Novy, R.G., Bester, G., Buchman, J.L., Nordgaard, J., Van Hest, P. 2015. 'Candidatus Liberibacter solanacearum' titers in and infection effects on potato tuber chemistry of promising germplasm exhibiting tolerance to zebra chip disease. Phytopathology. 105(12):1573-1584.
Fatty acid profiling to characterize California strains of Xylella fastidiosa - (Abstract Only)
Wallis, C.M., Chen, J. 2015. Fatty acid profiling to characterize California strains of Xylella fastidiosa. Phytopathology. 105(S4):143-144.
Interactions of potato psyllids, plant virus, and Candidatus Liberibacter solanacearum - (Proceedings)
Prager, S.M., Wallis, C.M., Trumble, J.T. 2015. Interactions of potato psyllids, plant virus, and Candidatus Liberibacter solanacearum. Meeting Proceedings. p. 26-30.
Wood-decay abilities of grapevine trunk pathogens Diaporthe ampelina, Diplodia seriata, Eutypa lata, and Neofusicoccum parvum - (Abstract Only)
Galarneau, E.R., Wallis, C.M., Morales-Cruz, A., Cantu, D., Baumgartner, K. 2015. Wood-decay abilities of grapevine trunk pathogens Diaporthe ampelina, Diplodia seriata, Eutypa lata, and Neofusicoccum parvum. American Phytopathological Society Abstracts. 50-P.
Candidatus Liberibacter solanacearum' development in Russet Norkotah under commercial storage conditions - (Proceedings)
Rashed, A., Wallis, C.M., Paetzold, L., Woodell, L., Olsen, N., Workneh, F., Rashidi, M., Wenninger, E., Rush, C. 2015. Candidatus Liberibacter solanacearum' development in Russet Norkotah under commercial storage conditions. Meeting Proceedings. p. 13-17.
Indirect effects of one plant pathogen on the transmission of a second pathogen and the behavior of its potato psyllid vector - (Peer Reviewed Journal)
Prager, S.M., Wallis, C.M., Trumble, J.T. 2015. Indirect effects of one plant pathogen on the transmission of a second pathogen and the behavior of its potato psyllid vector. Environmental Entomology. 44:1065-1075.
Deficit irrigation: is it impacting yield and nutritional quality of fruits? - (Popular Publication)
Centofanti, T., Banuelos, G.S., Wallis, C.M., Ayars, J.E. 2015. Deficit irrigation: is it impacting yield and nutritional quality of fruits?. New Ag International Magazine. March/April 54-56.
Silicon induced systemic defense responses in perennial ryegrass against Magnaporthe oryzae infection - (Peer Reviewed Journal)
Rahman, A., Wallis, C.M., Uddin, W. 2015. Silicon induced systemic defense responses in perennial ryegrass against Magnaporthe oryzae infection. Phytopathology. 105:748-757.
Update on zebra chip variety screening trial - (Proceedings)
Munyaneza, J.E., Wallis, C.M., Novy, R.G., Bester, G., Ronis, D., Nordgaard, J., Buchman, J.L., Van Hest, P., Thompson, A. 2015. Update on zebra chip variety screening trial. Meeting Proceedings. pp. 82-84.
Effects of glassy-winged sharpshooter feeding, size, and lipid content on egg maturation - (Peer Reviewed Journal)
Sisterson, M.S., Wallis, C.M., Stenger, D.C. 2015. Effects of glassy-winged sharpshooter feeding, size, and lipid content on egg maturation. Journal of Economic Entomology. 108:1014-1024.
Whole-genome sequence of “Candidatus Liberibacter solanacearum” strain R1 from California - (Peer Reviewed Journal)
Zheng, Z., Clark, N., Keremane, M.L., Lee, R.F., Wallis, C.M., Deng, X., Chen, J. 2014. Whole-genome sequence of “Candidatus Liberibacter solanacearum” strain R1 from California. Genome Announcements. 2(6):e01353-14.
Effects of feeding on glassy-winged sharpshooter lipid content and egg production - (Abstract Only)
Sisterson, M.S., Wallis, C.M., Stenger, D.C. 2014. Effects of feeding on glassy-winged sharpshooter lipid content and egg production. CDFA Pierce's Disease Research Progress Reports. p. 9.
Glassy-winged sharpshooter oviposition effects on photinia volatile chemistry with implications on egg parasitoid effectiveness - (Abstract Only)
Wallis, C.M., Krugner, R. 2014. Glassy-winged sharpshooter oviposition effects on photinia volatile chemistry with implications on egg parasitoid effectiveness. CDFA Pierce's Disease Research Progress Reports. p. 256.
Effects of potato-psyllid-vectored ‘Candidatus Liberibacter solanacearum’ infection on potato leaf and stem physiology - (Peer Reviewed Journal)
Wallis, C.M., Rashed, A., Chen, J., Paetzold, L., Workneh, F., Rush, C.M. 2015. Effects of potato-psyllid-vectored ‘Candidatus Liberibacter solanacearum’ infection on potato leaf and stem physiology. Phytopathology. 105:189-198.
Differences between Helianthus winteri and Helianthus annuus are deeper than physiology - (Abstract Only)
Constable, J.V., Stebbins, J., Winchell, C., Wallis, C.M. 2014. Differences between Helianthus winteri and Helianthus annuus are deeper than physiology. Ecological Society of America Abstracts. PS 57-121.
Coming Soon: CADRE (Career Advancement and Development Resources and Education) website for all APS members - (Other)
Wallis, C.M., Ward-Gauthier, N. 2014. Coming Soon: CADRE (Career Advancement and Development Resources and Education) website for all APS members. Phytopathology News. 48:119.
Effects of a selenium-laden soil amendment on grapevine metabolism and progression of Pierce’s disease - (Abstract Only)
Wallis, C.M., Centofanti, T., Banuelos, G.S. 2014. Effects of a selenium-laden soil amendment on grapevine metabolism and progression of Pierce’s disease. American Phytopathological Society Abstracts. 104:S3.124.
Potatoes tolerant of ‘Candidatus Liberibacter solanacearum’ infection do not undergo changes in tuber physiology associated with zebra chip disease - (Abstract Only)
Wallis, C.M., Munyaneza, J.E., Novy, R.G. 2014. Potatoes tolerant of ‘Candidatus Liberibacter solanacearum’ infection do not undergo changes in tuber physiology associated with zebra chip disease. Phytopathology. 104:S3.124.
Pyrosequencing analyses of endophytic bacterial populations in tomato leaves infected by ‘Candidatus Liberibacter solanacearum’ - (Abstract Only)
Clark, N., Frigulti, T., Bushoven, J., Zheng, Z., Wallis, C.M., Chen, J. 2014. Pyrosequencing analyses of endophytic bacterial populations in tomato leaves infected by ‘Candidatus Liberibacter solanacearum’. American Phytopathological Society Abstracts. 104(S3):27.
Attraction of the egg parasitoid, Gonatocerus ashmeadi Girault (Hymenoptera: Mymaridae) to synthetic formulation of a (E)-ß-ocimene and (E,E)-a-farnesene mixture - (Peer Reviewed Journal)
Krugner, R., Wallis, C.M., Walse, S.S. 2014. Attraction of the egg parasitoid, Gonatocerus ashmeadi Girault (Hymenoptera: Mymaridae) to synthetic formulation of a (E)-ß-ocimene and (E,E)-a-farnesene mixture. Biological Control. 77:23-28.
Structure assignment and H/D-exchange behavior of several glycosylated polyphenols - (Peer Reviewed Journal)
Franz, A.H., Serebnitskaya, L., Gudial, G., Wallis, C.M. 2014. Structure assignment and H/D-exchange behavior of several glycosylated polyphenols. Archives for Organic Chemistry (ARKIVOC). 2014:94-122.
Examining the role of tuber biochemistry in the development of zebra chip in stored potato tubers - (Proceedings)
Wallis, C.M., Rashed, A., Workneh, F., Rush, C.M. 2014. Examining the role of tuber biochemistry in the development of zebra chip in stored potato tubers. In: Workneh F, Rush CM, eds., Proc. 13th Annu. SCRI Zebra Chip Reporting Session. Fredric Printing, CO. pp. 153-157.
Potato psyllid vector density and zebra chip disease - (Proceedings)
Rashed, A., Wallis, C.M., Workneh, F., Paetzold, L., Rush, C.M. 2014. Potato psyllid vector density and zebra chip disease. In: Workneh F, Rush CM, eds., Proc 13th Annual SCRI Zebra Chip Reporting Session. Fredric Printing, Aurora, CO. pp. 136-140.
Increase of “Candidatus Liberibacter solanacearum” titer in aging tomato leaves and pyrosequencing analyses of endophyte populations - (Proceedings)
Clark, N., Frigulti, T., Zheng, Z., Wallis, C.M., Bushoven, J., Chen, J. 2014. Increase of “Candidatus Liberibacter solanacearum” titer in aging tomato leaves and pyrosequencing analyses of endophyte populations. Meeting Proceedings. p. 171-175.
Tri-trophic movement of carotenoid pigments from host plant to the parasitoid of a caterpillar - (Peer Reviewed Journal)
Wang, X., Wallis, C.M., Daane, K.M. 2014. Tri-trophic movement of carotenoid pigments from host plant to the parasitoid of a caterpillar. Journal of Insect Physiology. 61:58-65.
Rootstock effects on progression of Pierce's disease symptom development and possible mechanisms - (Abstract Only)
Wallis, C.M., Wallingford, A.K., Chen, J. 2013. Rootstock effects on progression of Pierce's disease symptom development and possible mechanisms. In: Proceedings of the Pierce's Disease Research Symposium, December 16-18, 2013, Sacramento, California. p. 214.
Grapevine rootstock effects on scion sap phenolic levels, resistance to Xylella fastidiosa infection, and progression of Pierce’s disease - (Peer Reviewed Journal)
Wallis, C.M., Wallingford, A.K., Chen, J. 2013. Grapevine rootstock effects on scion sap phenolic levels, resistance to Xylella fastidiosa infection, and progression of Pierce’s disease. Frontiers in Plant Physiology. 4:502. http://dx.doi.org/10.3389/fpls.2013.00502.
The effects of potato psyllid vector density, movement behavior, and host choice on pathogen spread and zebra chip disease severity - (Abstract Only)
Rashed, A., Wallis, C.M., Paetzold, L., Workneh, F., Rush, C. 2013. The effects of potato psyllid vector density, movement behavior, and host choice on pathogen spread and zebra chip disease severity. Entomological Society of America Annual Meeting. Available: http://esa.confex.com/esa/2013/webprogram/Paper76925.html.
Similarities and differences in physiological responses to ‘Candidatus Liberibacter solanacearum’ infection among different potato cultivars - (Peer Reviewed Journal)
Wallis, C.M., Rashad, A., Wallingford, A.K., Paetzold, L., Workneh, F., Rush, C.M. 2014. Similarities and differences in physiological responses to ‘Candidatus Liberibacter solanacearum’ infection among different potato cultivars. Phytopathology. 104:126-133.
Xylella fastidiosa infection effects on xylem sap and tissue phenolics in different grapevine cultivars - (Peer Reviewed Journal)
Wallis, C.M., Wallingford, A.K., Chen, J. 2013. Xylella fastidiosa infection effects on xylem sap and tissue phenolics in different grapevine cultivars. Physiological and Molecular Plant Pathology. 84:28-35.
2013 Schroth faces of the future symposium to highlight early career professionals in Mycology - (Trade Journal)
Wallis, C.M. 2013. 2013 Schroth faces of the future symposium to highlight early career professionals in Mycology. Phytopathology News. 47:95.
Effects of grapevine sap phenolics on the in vitro growth of Xylella fastidiosa - (Abstract Only)
Wallis, C.M., Wallingford, A.K. 2013. Effects of grapevine sap phenolics on the in vitro growth of Xylella fastidiosa. American Phytopathological Society Abstracts. 103(S2):154.
Effects of rootstock on Xylella fastidiosa infection and grapevine sap phenolics - (Abstract Only)
Wallingford, A.K., Wallis, C.M., Chen, J. 2013. Effects of rootstock on Xylella fastidiosa infection and grapevine sap phenolics. American Phytopathological Society Abstracts. 103(S2):154-155.
Relationship of potato biochemical responses to ‘Candidatus Liberibacter solanacearum’, causal agent of zebra chip, to disease progression - (Abstract Only)
Wallis, C.M., Rashed, A., Wallingford, A.K., Rush, C.M. 2013. Relationship of potato biochemical responses to ‘Candidatus Liberibacter solanacearum’, causal agent of zebra chip, to disease progression. American Phytopathological Society Abstracts. 103(S2):154.
Scanning electron microscopy and in vitro cultivation of endophytic bacteria from potato tubers related to Zebra Chip disease - (Peer Reviewed Journal)
Liu, Q., Chen, J., Munyaneza, J.E., Civerolo, E.L., Wallis, C.M. 2013. Scanning electron microscopy and in vitro cultivation of endophytic bacteria from potato tubers related to Zebra Chip disease. Canadian Journal of Plant Pathology. 35:192-199.
Different potato cultivars may vary in zebra chip symptoms and associated physiological changes when infected by 'Candidatus Liberibacter solanacearum' - (Proceedings)
Wallis, C.M., Rashed, A., Wallingford, A.K., Rush, C.M. 2013. Different potato cultivars may vary in zebra chip symptoms and associated physiological changes when infected by 'Candidatus Liberibacter solanacearum'. Symposium Proceedings. p. 89-93.
Update on the potato variety screening for zebra chip resistance trial - (Proceedings)
Munyaneza, J.E., Buchman, J.L., Bester, G., Novy, R.G., Miller, C., Van Hest, P., Nordgaard, J., Yilma, S., Wallis, C.M. 2013. Update on the potato variety screening for zebra chip resistance trial. In: Proceedings of the 12th Annual SCRI Zebra Chip Reporting Session, ed. F.Workneh, A.Rashed, and C.M. Rush, San Antonio, TX (October 30-November 2, 2012. pp 122-124.
Zebra Chip disease and potato biochemistry: Tuber physiological changes in response to ‘Candidatus Liberibacter solanacearum’ infection over time - (Peer Reviewed Journal)
Rashed, A., Wallis, C.M., Paetzold, L., Workneh, F., Rush, C.M. 2013. Zebra Chip disease and potato biochemistry: Tuber physiological changes in response to ‘Candidatus Liberibacter solanacearum’ infection over time. Phytopathology. 103:419-426.
Induction of phenolic compounds in response to Xylella fastidiosa infection in five different grapevine cultivars - (Abstract Only)
Wallis, C.M., Wallingford, A.K., Chen, J. 2012. Induction of phenolic compounds in response to Xylella fastidiosa infection in five different grapevine cultivars. In: Esser, T., Randhawa, R. [eds.], Proceedings, 2012 Pierce's Disease Research Symposium. California Department of Food and Agriculture, Sacramento, CA pp. 253.
Evaluation of grapevine as a host for the glassy-winged sharpshooter - (Abstract Only)
Sisterson, M.S., Krugner, R., Wallis, C.M. 2012. Evaluation of grapevine as a host for the glassy-winged sharpshooter. In: Pierce's Disease Research Progress Reports, California Department of Food and Agriculture. pp 12.
Plant defenses and climate change: doom or destiny for the lodgepole pine? - (Trade Journal)
Lewis, K.J., Wallis, C.M. 2012. Plant defenses and climate change: doom or destiny for the lodgepole pine? Trade Journal Publication. 19(4):10-11.
Grapevine phenolics in xylem sap and tissues are significantly altered during infection by Xylella fastidiosa - (Peer Reviewed Journal)
Wallis, C.M., Chen, J. 2012. Grapevine phenolics in xylem sap and tissues are significantly altered during infection by Xylella fastidiosa. Phytopathology. 102:816-826.
Grapevines undergo varying shifts in secondary metabolic profiles when infected with Xylella fastidiosa - (Abstract Only)
Wallis, C.M., Chen, J. 2012. Grapevines undergo varying shifts in secondary metabolic profiles when infected with Xylella fastidiosa. Phytopathology. 102:S4.129.
Large-scale shifts in potato (Solanum tuberosum) tuber physiology occur following infection by ‘Candidatus Liberibacter solanacearum - (Abstract Only)
Wallis, C.M., Rashed, A., Rush, C.M. 2012. Large-scale shifts in potato (Solanum tuberosum) tuber physiology occur following infection by ‘Candidatus Liberibacter solanacearum. Phytopathology. 102:S4.129.
Zebra chip-diseased potato tubers are characterized by increased levels of host secondary metabolites, amino acids, and defense-related proteins - (Peer Reviewed Journal)
Wallis, C.M., Chen, J., Civerolo, E.L. 2012. Zebra chip-diseased potato tubers are characterized by increased levels of host secondary metabolites, amino acids, and defense-related proteins. Physiological and Molecular Plant Pathology. Available: http://dx.doi.org/10.1016/j.pmpp.2012.02.001
The effects of Zebra Chip disease development and bacterial titer on biochemical properties in relation to the time of infection - (Proceedings)
Rashed, A., Wallis, C.M., Simmons, A., Paetzold, L., Workneh, F., Rush, C.M. 2012. The effects of Zebra Chip disease development and bacterial titer on biochemical properties in relation to the time of infection. In: Workneh F. Rashed A. Rush CM (eds). Proceedings of the 11th annual SCRI zebra chip reporting session. Fredric Printing, Aurora, NY. p.65-69.
Zebra chip disease severity and ‘Candidatus Liberibacter solanacearum’ titer load of the potato hosts inoculated throughout the field season - (Proceedings)
Rashad, A., Workneh, F., Paetzold, L., Wallis, C.M., Rush, C.M. 2012. Zebra chip disease severity and ‘Candidatus Liberibacter solanacearum’ titer load of the potato hosts inoculated throughout the field season. In: Workneh F. Rashed A. Rush CM (eds). Proceedings of the 11th annual SCRI zebra chip reporting session. Fredric Printing, Aurora, NY. p.27-31.
Zebra chip symptoms are associated with increased phenolic, pathogenesis-related protein, and amino acid levels - (Proceedings)
Wallis, C.M., Chen, J. 2012. Zebra chip symptoms are associated with increased phenolic, pathogenesis-related protein, and amino acid levels. In: Workneh F. Rashed A. Rush CM (eds). Proceedings of the 11th annual SCRI zebra chip reporting session. Fredric Printing, Aurora, NY. p.159-162.
Xylella fastidiosa infection of grapevines affects xylem levels of phenolic compounds and pathogenesis-related proteins - (Abstract Only)
Wallis, C.M., Chen, J., Sisterson, M.S. 2011. Xylella fastidiosa infection of grapevines affects xylem levels of phenolic compounds and pathogenesis-related proteins. CDFA Pierce's Disease Control Program Research Symposium. p.22.
Glassy-winged sharpshooter excreta production and egg maturation on grapevines - (Abstract Only)
Sisterson, M.S., Wallis, C.M. 2011. Glassy-winged sharpshooter excreta production and egg maturation on grapevines. CDFA Pierce's Disease Control Program Research Symposium, Dec 13-15, 2011, Sacramento, CA. Available: http://www.cdfa.ca.gov/pdcp/Documents/2011_Proc.pdf
Ecosystem, location, and climate effects on foliar secondary metabolites of lodgepole pine populations from central British Columbia. - (Peer Reviewed Journal)
Wallis, C.M., Huber, D.P., Lewis, K.J. 2011. Ecosystem, location, and climate effects on foliar secondary metabolites of lodgepole pine populations from central British Columbia. Journal of Chemical Ecology. 37(6):607-621.
Grape hosts infested with glassy-winged sharpshooters produce volatile compounds which may attract egg parasitoids - (Abstract Only)
Wallis, C.M., Krugner, R., Walse, S.S. 2011. Grape hosts infested with glassy-winged sharpshooters produce volatile compounds which may attract egg parasitoids. Phytopathology 101:S184.
Zebra chip disease symptoms are positively associated with pathogenesis-related protein activity and phenolic compound levels in tubers - (Abstract Only)
Wallis, C.M., Chen, J. 2011. Zebra chip disease symptoms are positively associated with pathogenesis-related protein activity and phenolic compound levels in tubers. Phytopathology. 101:S184.
Xylella fastidiosa infection of grapevines affects host secondary metabolite and defense-related protein levels within xylem - (Abstract Only)
Wallis, C.M., Sisterson, M.S. 2011. Xylella fastidiosa infection of grapevines affects host secondary metabolite and defense-related protein levels within xylem. Phytopathology. 101:S185.
Glassy-winged sharpshooter infestations induce grape hosts to produce volatile compounds which may attract egg parasitoids - (Proceedings)
Wallis, C.M., Krugner, R., Walse, S.S. 2010. Glassy-winged sharpshooter infestations induce grape hosts to produce volatile compounds which may attract egg parasitoids. CDFA Pierce's Disease Control Program Research Symposium, Dec 15-17, 2010, San Diego, California. p.51.
Lodgepole pine provenances differ in chemical defense capacities against foliage and stem diseases - (Peer Reviewed Journal)
Wallis, C.M., Reich, R., Lewis, K.J., Huber, D.P. 2010. Lodgepole pine provenances differ in chemical defense capacities against foliage and stem diseases. Canadian Journal of Forest Research. 40:2333-2344.
Do climate and outbreak frequency affect levels of foliar phytochemistry in different lodgepole pine (Pinus contorta) stands? - (Abstract Only)
Wallis, C.M., Huber, D.P., Lewis, K.J. 2010. Do climate and outbreak frequency affect levels of foliar phytochemistry in different lodgepole pine (Pinus contorta) stands?. Phytopathology. 100:S132.