Rhonda J Smith

Viticulture Farm Advisor, Emeritus

UC Cooperative Extension
133 Aviation Boulevard
Suite 109
Santa Rosa, CA 95403-2894
707-565-2621
rhsmith@ucanr.edu

http://cesonoma.ucanr.edu/

http://cesonoma.ucanr.edu/viticulture717/

Education

M.S. Horticulture/Viticulture, UC Davis. 1983

B.S. Plant Science/Plant Pathology, UC Davis. 1977

Specialty

Areas of Expertise (click to see all ANR academics with this expertise)

• Wine Grapes
• Plants and Their Systems
• Plant Management Systems
• Insects, Mites, and Other Arthropods Affecting Plants
• Pathogens and Nematodes Affecting Plants

Bibliography

Peer Reviewed

• Fuchs, M.; Almeyda, C.V., et al.; Al Rwahnih, M.; Atallah, S.S.; Cieniewicz, E.J.; Farrar, K.; Foote, W.R.; Golino, D.A.; Gomez, M.I.; Harper, S.J.; Kelly, M.K.; Martin, R.R.; Martinson, T.; Osman, F.M.; Park, K.; Scharlau, V.; Smith, R.; Tzanetakis, I.E.; Vidalakis, G.; and Welliver, R. (2021). Economic Studies Reinforce Efforts to Safeguard Specialty Crops in the United States. Plant Disease. 105:(9), 14-26.
• Al Rwahnih, Maher; Diaz-Lara, Alfredo, et al.; Arnold, Kari; Cooper, Monica L.; Smith, Rhonda J.; Zhuang, George; Battany, Mark C.; Bettiga, Larry J.; Rowhani, Adib and Golino (2021). Incidence and Genetic Diversity of Grapevine Pinot gris Virus in California. American Journal of Enology and Viticulture. 72:2, 164-169.
• Girardello, R.C.; Rich, V., et al.; Smith, R.J.; Brenneman, C.; Heymann, H.; Oberholster, A. (2020). The impact of grapevine red blotch disease on Vitis vinifera L. Chardonnay grape and wine composition and sensory attributes over three seasons. J Sci Food Agric. 100, 1436-1447.
• Martínez-Lüscher, J.; Plank, CM., et al.; Brillante, L.; Cooper, M.L.; Smith, R.J.; Al-Rwahnih, M.; Yu, R.; Oberholster, A.; Girardello, R.; Kurtural, S. Kaan. (2019). Grapevine Red Blotch Virus may reduce carbon translocation leading to impaired grape berry ripening. J. Agric Food Chem. 67:9, 2437-2448.
• Girardello, R.C.; Cooper, M.L., et al.; Smith, R.J.; Lerno, L.; Bruce, R.C.; Eridon, S.; Oberholster, A. (2019). Impact of grapevine red blotch disease on grape composition of Vitis vinifera Cabernet Sauvignon, Merlot, and Chardonnay. J. Ag Food Chem. 67, 5496-5511.
• Wunderlich, L.R.; Niederholzer, F., et al.; Blecker, L.; Smith, R.J.; Strmiska, M.; Symmes, E.; Bolton, S. (2019). Survey reveals training needs for airblast sprayer applicators, farm managers, owners and pest control advisers. Outlooks on Pest Management. 30:2, 53-59. April.
• Arnold, K.; McRoberts, N., et al.; Cooper, M.; Smith, R.; Golino, D. (2019). Virus surveys of commercial vineyards show value of planting certified vines. Calif Agr. 73:2, 90-95. https://doi.org/10.3733/ca.2019a0006
• Diaz-Lara, A; Klaassen, A., et al.; Stevens, K.; Sudarshana, MR.; Rowhani, A.; Maree, HJ.; Chooi, KM.; Bluin, AG.; Habili, N.; Song, S.; Aram, K.; Arnold, K.; Cooper, ML.; Wunderlich, L.; Battany, MC; Bettiga, LJ; Smith, RJ.; Bester, R.; Xiao, H.; Meng, B.; Preece, JE.; Golino, D.; Al Rwahnih, A. (2018). Characterization of grapevine leafroll-associated virus 3 genetic variants and application towards RT-qPCR assay design. PLoS ONE. 13:12, pp. 18.
• Daugherty, M.P.; Almeida, R.P.P., et al.; Smith, R.J.; Weber, E.A.; Purcell, A.H. (2018). Severe pruning of infected grapevines has limited efficacy for managing Pierce's disease. Am J Enol Vitic. 69:3, 289-294.
• Morales-Cruz, A.; Allenbeck, G., et al.; Figueroa-Balderas, R.; Ashworth, V. E.; Lawrence, D. P.; Travadon, R.; Smith, R. J.; Baumgartner, K.; Rolshausen, P. E.; and Cantu, D. (2017). Closed-reference metatranscriptomics enables inplanta profiling of putative virulence activities in the grapevine trunk disease complex. Molecular Plant Pathology. 19:2, 490-503.
• Ricketts, J.D.; Gomez, M.I., et al.; Fuchs, M.F.; Martinson, T.E.; Smith, R.J.; Cooper, M.L.; Moyer, M.M.; Wise, A. (2017). "Mitigating the Economic Impact of Grapevine Red Blotch: Optimizing Disease Management Strategies in U.S. Vineyards." Am. J. Enol. Vitic 68(1): 127-135.
• Blanco-Ulate, B.; Hopfer, H., et al.; Figueroa-Balderas, R.; Ye, Z.; Rivero, R.M.; Albacete, A.; Pérez-Alfocea, F.; Koyama, R.; Anderson, M.M.; Smith, R.J.; Ebeler, S.E.; Cantu, D. (2017). Red blotch disease alters grape berry development and metabolism by interfering with the transcriptional and hormonal regulation of ripening. Journal of Experimental Botany. 68:5, 1225-1238.
• Smith, R.J.; Bettiga, L.J., et al.; Gubler, W.D. (2015). Diseases. UC IPM Pest Management Guidelines: Grape. University of California Division of Agriculture and Natural Resources. Publ. 3448.
• Varela, L.G.; Haviland, D.R., et al.; Bentley, W.J.; Zalom, F.G.; Bettiga, L.J.; Smith, R.J.; Daane, K.M. (2015). Insects and Mites. UC IPM Pest Management Guidelines: Grape. University of California Division of Agriculture and Natural Resources. Public. 3448, 13-83.
• Ricketts, K.D.; Gomez, M.I., et al.; Atallah, S.S.; Fuchs, M.F.; Martinson, T.E.; Smith, R.J.; Verdegaal, P.S.; Cooper, M.L.; Bettiga, L.J.; Battany, M.C. (2015). "Reducing the economic impact of grapevine leafroll disease in California: Identifying optimal disease management strategies." Am. J. Enol. Vitic 66(2): 138-147.

• Cooper, M.; Varela, L.; Smith, R.; Whitmer, D.; Simmons, G.; Lucchi, A.; Broadway, R.; Steinhauer, R. (2014). "Managing Newly Established Pests: Growers, scientists and regulators collaborate on European grapevine moth program." Calif Agr 68(4): 125-133.    https://doi.org/10.3733/ca.v068n04p125

• Bettiga, L.J.; Smith, R.J., et al.; Peacock, W.L.; Hembree, K.J.; Weber, E.A.; Verdegaal, P.S. (2013). Abiotic Disorders and Injuries of Grapevines. Grape Pest Management.L. Bettiga. Oakland, University of California Division of Agriculture and Natural Resources. Publication 3343: 29-45.
• Zalom, F.G.; Bettiga, L.J., et al.; Smith, R.J. (2013). Branch and Twig Borer. Grape Pest Management.L. Bettiga. Oakland, University of California Division of Agriculture and Natural Resources. Publication 3343: 307-310.
• Varela, L.G.; Cooper, M.L., et al.; Smith, R.J. (2013). Can European grapevine moth, Lobesia botrana, (Lepidoptera: Tortricidae) be eradicated from California? IOBC: Working group on the Integrated Protection and Production in Viticulture. IOBC/WPRS Bulletin. 85, 95-102.
• Prichard, T.L.; Verdegaal, P., et al.; Schwankl, L.; Smith, R. (2013). Controlling Offsite Movement of Agricultural Chemical Residues: Winegrapes. University of California Agriculture and Natural Resources. Publication 8456. August 2013.
• Zalom, F.G.; Smith, R.J., et al.; Norton, M.V. (2013). Cutworms. Grape Pest Management.L. Bettiga. Oakland, University of California Division of Agriculture and Natural Resources. Publication 3343: 341-345.
• Smith, R.J.; Hashim, J.M. (2013). Diagnosing Vineyard Problems. Grape Pest Management.L. Bettiga. Oakland, University of California Division of Agriculture and Natural Resources. Publication 3343: 49-54.
• Bettiga, L.J.; Smith, R.J. (2013). European Earwig. Grape Pest Management.L. Bettiga. Oakland, University of California Division of Agriculture and Natural Resources. Publication 3343: 181-182.
• Daane, K.M.; Rosenheim, J.A., et al.; Smith, R.J.; Coviello, R.L. (2013). Grape Leafhopper. Grape Pest Management.L. Bettiga. Oakland, University of California Division of Agriculture and Natural Resources. Publication 3343: 202-219.
• Smith, R.J.; Weber, E.A., et al.; McGourty, G.T. (2013). North Coast Calendar of Events for Viticulture Management. Grape Pest Management.E. Bettiga. Oakland, University of California Division of Agriculture and Natural Resources. Publication 3343: 16-17.
• Urbez-Torres, J.R.; Peduto, F., et al.; Smith, R.J.; Gubler, W.D. (2013). "Phomopsis dieback: a grapevine trunk disease caused by Phomopsis viticola in California." Plant Dis 97: 1571-1579.
• Purcell, A.H.; Kirkpatrick, B.C., et al.; Ameida, R.; Varela, L.G.; Smith, R.J.; Weber, E.A.; Hashim, J.M.; Gispart, C. (2013). Pierce's Disease. Grape Pest Management.L. Bettiga. Oakland, University of California Division of Agriculture and Natural Resources. Publication 3343: 75-82.
• Daane, K.M.; Bentley, W.J., et al.; Smith, R.J.; Haviland, D.R.; Weber, E.A; Battany, M.; Gispert, C.; Millar, J.G. (2013). Planococcus Mealybugs (Vine Mealybug). Grape Pest Management.L. Bettiga. Oakland, University of California Division of Agriculture and Natural Resources. Publication 3343: 246-260.
• Varela, L.G.; Smith, R.J., et al.; Purcell, A.H.; Hashim, J.M.; Weber, E.A.; Haviland, D.R. (2013). Sharpshooters. Grape Pest Management.L. Bettiga. Oakland, University of California Division of Agriculture and Natural Resources. Publication 3343: 277-285.
• Mussen, E.C.; Smith, R.J. (2013). Social Wasps and Honey Bees. Grape Pest Management.L. Bettiga. Oakland, University of California Division of Agriculture and Natural Resources. Publication 3343: 332-334.
• Phillips, P.A.; Smith, R.J., et al.; Bettiga, L.J.; Hashim, J.M.; Peacock, W.L. (2013). Thrips. Grape Pest Management.L. Bettiga. Oakland, University of California Division of Agriculture and Natural Resources. Publication 3343: 295-304.
• Smith, R.J. (2013). Treehoppers. Grape Pest Management.L. Bettiga. Oakland, University of California Division of Agriculture and Natural Resources. Publication 3343: 286-287.
• Al Rwahnih, M.; Rowhani, A., et al.; Smith, R.J.; Uyemoto, J.K.; Sudarshana, M.R. (2012). "Grapevine necrotic union, a newly recognized disease of unknown etiology in grapevines grafted on 110 Richter rootstock in California." Journal of Plant Pathology 94(1): 149-156.

• Varela, L.G.; Bentley, W.J.; Baldwin, R.A.; Shrestha, A.; Smith, R.J.; Vasquez, S.J. 2011. Vineyard Pest Identification and Monitoring Cards. University of California Division of Agriculture and Natural Resources, Publication 3532.

• Urbez-Torres, J.R.; Battany, M., et al.; Bettiga, L.; Gispart, G.; McGourty, G.; Roncoroni, J.; Smith, R.J.; Gubler, W.D. (2010). "Botryosphaeriaceae species spore trapping studies in California Vineyards." Plant Dis 94: 717-724.

• Krasnow, M.N.; Matthews, M.A.; Smith, R.J.; Benz, J.; Weber, E.; Shackel, K.A. (2010). "Distinctive symptoms differentiate four common types of berry shrivel disorder in grapes." Calif Agr 64(3): 155-159. https://doi.org/10.3733/ca.v064n03p155

• Rolshausen, P.E.; Urbez-Torres, J.R., et al.; Rooney-Latham, S.; Eskalen, A.; Smith, R.J.; Gubler, W.D. (2010). "Evaluation of pruning wound susceptibility and protection against fungi associated with grapevine trunk diseases in California." Am. J. Enol. Vitic 61(1): 113-119.
• Krasnow, M.; Weis, N., et al.; Smith, R.J.; Benz, M.J.; Matthews, M.; Shackel, K. (2009). "Inception, Progression, and Compositional Consequences of a Berry Shrivel Disorder." Am. J. Enol. Vitic 60(1): 24-34.
• Steinmaus, S.; Elmore, C.L., et al.; Smith, R.J.; Donaldson, D.; Weber, E.A.; Roncoroni, J.A.; Miller, P.R. (2008). "Mulched cover crops as an alternative to conventional weed management systems in vineyards." Weed Research 48: 278-281.

• Smith, R.J.; Varela, L.G. (2008). "Sidebar: Pomace management reduces spread of vine mealybugs." Calif Agr 62(4): 172-173. https://doi.org/10.3733/ca.v062n04p172.

• Anderson, M.M.; Smith, R.J., et al.; Williams, M.A.; Wolpert, J.A. (2008). "Viticultural Evaluation of French and California Chardonnay Clones Grown for Production of Sparkling Wine." Am. J. Enol. Vitic 59(1): 73-77.
• Anderson, M.M.; Smith, R.J., et al.; Williams, M.A.; Wolpert, J.A. (2008). "Viticultural Evaluation of French and California Pinot noir Clones Grown for Production of Sparkling Wine." Am. J. Enol. Vitic 59(2): 188-193.
• Gubler, D.; Smith, R.J., et al.; Varela, L.G.; Stapleton, J.J.; Leavitt, G.M.; Purcell, A. (2006). Diseases. UC IPM Pest Management Guidelines: Grape. University of California Division of Agriculture and Natural Resources. Publ. 3448.
• Bentley, W.J.; Varela, L.G., et al.; Zalom, F.G.; Smith, R.J.; Purcell, A.H.; Phillips, P.A.; Haviland, D.R.; Daane, K.M.; Battany, M.C. (2006). Insects and Mites. UC IPM Pest Management Guidelines: Grape. University of California Division Agriculture Natural Resources. Publ. 3448.

• Meyers, J.M.; Miles, J.A.; Faucett, J.; Fathallah, F.; Janowitz, I.; Smith, R.; Weber, E.A. (2006). "Smaller loads reduce risk of back injuries during wine grape harvest." Calif Agr 60(1): 25-31.   https://doi.org/10.3733/ca.v060n01p25

• Mercado-Martin, G.; Wolpert, J.A., et al.; Smith, R. J. (2006). "Viticultural evaluation of eleven clones and two field selections of Pinot noir grown for production of sparkling wine in Los Carneros, California." Am. J. Enol. Vitic 57(3): 371-376.
• Smith, R.J. (2003). Cabernet franc. Wine Grape Varieties of California.L. Christensen. University of California Division of Agriculture and Natural Resources. Publication 3419, 32-35.
• Smith, R.J. (2003). Gewurztraminer. Wine Grape Varieties of California.L. Christensen. University of California Division of Agriculture and Natural Resources. Publication 3419: 66-69.
• Smith, R.J. (2003). Pinot blanc. Wine Grape Varieties of California.L. Christensen. University of California Agriculture and Natural Resources. Publication 3419: 112-113.
• Smith, R.J. (2003). Pinot gris. Wine Grape Varieties of California.L. Christensen. University of California Agriculture and Natural Resources. Publication 3419: 114-115.
• Smith, R.J. (2003). Pinot noir. Wine Grape Varieties of California.L. Christensen. University of California Agriculture and Natural Resources. Publication 3419: 106-111.
• Gubler, D.; Stapleton, J., et al.; Leavitt, G.; Purcell, A.; Varela, L.; Smith, R. (2002). Diseases. UC IPM Pest Management Guidelines: Grape. University of California Division Agriculture Natural Resources. Publ. 3339.
• Bentley, W.J.; Zalom, F., et al.; Granett, J.; Smith, R.; Varela, L.; Purcell, A. (2002). Insects and Mites. UC IPM Pest Management Guidelines: Grape. University of California Division Agriculture Natural Resources. Publ. 3339.
• Varela, L.G.; Smith, R.J., et al.; Phillips, P.A. (2001). Pierce's Disease. Oakland, University of California Division of Agriculture and Natural Resources. Publication 21600.
• Meyers, J.M.; Miles, J.A., et al.; Faucett, J.; Janowitz, I.; Tejeda, D.; Weber, E.; Smith, R.; Garcia, L.G. (2001). "Priority risk factors for back injury in agricultural field work: vineyard ergonomics." J. Agromedicine 8(1): 39-54.
• Gubler, W.D.; Stapleton, J., et al.; Leavitt, G.; Purcell, A.; Varela, L.; Smith, R. (2000). Pierce's disease. UC IPM Pest Management Guidelines: Grape. University of California Division of Agriculture and Natural Resources. Publ. 3339.
• Bentley, W.J.; Zalom, F., et al.; Granett, J.; Smith, R.; Varela, L.; Purcell, A. (1999). Grape Leafhoppers. UC IPM Guidelines: Grape. University of California Division of Agriculture and Natural Resources. Publ. 3339.
• Bentley, W.J.; Zalom, F., et al.; Granett, J.; Smith, R.; Varela, L.; Purcell, A. (1999). Grape Phylloxera. UC IPM Guidelines: Grape. University of California Division of Agriculture and Natural Resources. Publ. 3339.
• Elmore, C.; Donaldsen, D., et al.; Smith, R. (1998). Weed Management. Cover Cropping in Vineyards: A Grower's Handbook.C. Ingels, R. Bugg, G. McGourty and L. Christensen. Oakland, University of California Division of Agriculture and Natural Resources. Publication 3338. 1998.
• Feil, H.; Westerdahl, B.B., et al.; Smith, R.J.; Verdegaal, P. (1997). "Effect of seasonal and site factors on Xiphinema index populations in two California vineyards." J. Nematology 29(4): 491-500.

• Weber, E.; De Benedictis, J.; Granett, J.; Smith, R. (1996). "Enzone does little to improve health of phylloxera-infested vineyards." Calif Agr 50(4): 19-23. https://doi.org/10.3733/ca.v050n04p19

• Smith, R. (1992). Three-cornered alfalfa hopper. Grape Pest Management, 2nd Edition.D. Flaherty. Oakland, University of California Division of Agriculture and Natural Resources. Publication 3343, 249.
• Williams, L.E.; Smith, R.J. (1991). "The effect of rootstock on the partitioning of dry weight, nitrogen, and potassium, and root distribution of Cabernet Sauvignon grapevines." Am. J. Enol. Vitic 42(2): 113-117.
• Christensen, L.P.; Smith, R.J. (1989). "Effects of persistent woody laterals on bud performance of Thompson Seedless fruiting canes." Am. J. Enol. Vitic 40(1): 27-30.
• Williams, L.E.; Biscay, P.J., et al.; Smith, R. J. (1988). "The effect of Paclobutrazol injected into the soil on vegetative growth and yield of Vitis vinifera L., cv.Thompson Seedless." Journal of Hort. Sci 64(5)
• Williams, L.E.; Biscay, P.J., et al.; Smith, R. J. (1987). "Effect of interior canopy defoliation on berry composition and potassium distribution in Thompson Seedless grapevines." Am. J. Enol. Vitic 38(4): 287-292.
• Williams, L.E.; Smith, R.J. (1985). Net CO2 assimilation rate and nitrogen content of grape leaves subsequent to fruit harvest. J. Amer. Soc. Hort. Sci. 110:6, 846-850.
• Wilson, L.T.; Zalom, F.G., et al.; Smith, R.; Hofmann, M.P. (1983). Monitoring for fruit damage in Processing tomatoes: Use of a dynamic sequential sampling plan. Environmental Entomology. 12:3, 835-839.
• Zalom, F.G.; Wilson, L.T., et al.; Smith, R. (1983). Oviposition patterns by several lepidopterous pests on processing tomatoes in California. Environmental Entomology. 12:4, 1133-1137.

California Agriculture Article Contributions

• MANAGING NEWLY ESTABLISHED PESTS: Growers, scientists and regulators collaborate on European grapevine moth program
• Enzone does little to improve health of phylloxera-infested vineyards

ANR Workgroup Associations

• Integrated Grape Production - Member
• Pest Management in ANR - Member
• Spray Application Technology - Member
• Weed - Member

Return to Knowledge Stream