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United States Department of Agriculture

Agricultural Research Service

Related Topics

Christopher Wallis
Crop Diseases, Pests and Genetics Research
Plant Pathology

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

9611 S. RIVERBEND AVE.
PARLIER , CA 93648

Projects
Epidemiology and Management of Pierce's Disease and Other Maladies of Grape
In-House Appropriated (D)
  Accession Number: 422946

Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Grapevine red blotch-associated virus (GRBaV) infection effects on foliar metabolism of grapevines -
Host colonization and substrate utilization by wood-colonizing Ascomycete fungi in the grapevine trunk disease complex -
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.
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.
Evaluation of assembling methods on determination of whole genome sequence of Xylella fastidiosa blueberry bacterial leaf scorch strain -
Variations in Zebra Chip disease expression and tuber biochemistry in response to vector density -
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.
Characterization of different Californian strains of Xylella fastidiosa by fatty acid methyl ester (FAME) analyses -
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 -
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 -
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 -
'Candidatus Liberibacter solanacearum' titers in and infection effects on potato tuber chemistry of promising germplasm exhibiting tolerance to zebra chip disease -
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 -
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 -
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 -
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 -
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 -
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? -
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 -
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 -
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 -
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 -
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 -
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 -
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 -
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 -
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 -
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 -
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 -
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’ -
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 -
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 -
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 -
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 -
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 -
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 -
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 -
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 -
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 -
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 -
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 Reprint Icon -
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 -
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 -
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 -
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 -
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 -
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' -
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 -
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 Reprint Icon -
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 -
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 -
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? -
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 -
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 -
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 -
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 -
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
Xylella fastidiosa infection of grapevines affects xylem levels of phenolic compounds and pathogenesis-related proteins -
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.
Zebra chip symptoms are associated with increased phenolic, pathogenesis-related protein, and amino acid levels -
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.
The effects of Zebra Chip disease development and bacterial titer on biochemical properties in relation to the time of infection -
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 -
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.
Glassy-winged sharpshooter excreta production and egg maturation on grapevines -
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. -
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 -
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 -
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 -
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 -
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 Reprint Icon -
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? Reprint Icon -
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.
Last Modified: 5/2/2016
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