Division of Agriculture and Natural Resources
Division of Agriculture and Natural Resources
Division of Agriculture and Natural Resources
University of California
Division of Agriculture and Natural Resources

Lynn Wunderlich

Photo of Lynn Wunderlich
Farm Advisor
University of California Cooperative Extension Amador County
12200-B Airport Road
Jackson, CA 95642-9527
(530) 621-5505
lrwunderlich@ucanr.edu Create VCard

Also in:
Calaveras County
El Dorado County
Tuolumne County


I began my career as a UCCE Farm Advisor in El Dorado and Amador Counties in the fall of 2000, after working several years as a UC staff researcher on IPM projects in the Monterey and Ventura County UCCE offices. I earned my B.S. in Bacteriology at UW-Madison (1985) and my M.S. in Plant Protection and Pest Management at UC-Davis (1997). During my B.S. I completed a thesis and discovered a bacterium that is an effective biological control against soil-borne Phytopthora disease. My M.S. thesis was on developing a mechanical release technique for the natural enemy, the green lacewing.

From 2000-2007 the emphasis of my research as a Farm Advisor in the foothills has been on pest management in tree fruits, primarily codling moth control strategies.  In 2007 my program responsibilities shifted to include wine grapes as well.  In 2011, El Dorado and Amador counties joined Calaveras and Tuolumne counties to form a UCCE multi-county partnership. 

My current work as Farm Advisor for this region emphasizes viticulture production and IPM, while continuing to assist the tree fruit and Christmas tree growers in the area.  Most recently I am working to improve air-assisted spray coverage in orchards and vineyards by delivering training programs to applicators, their supervisors and PCAs.


M.S. Plant Protection and Pest Management, University of California-Davis. 1997
B.S. Bacteriology/Plant Pathology, University of Wisconsin-Madison. 1985



Viticulture and Pomology for the foothills; Sprayer calibration; Integrated Pest Management; Biological Control

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


Peer Reviewed

  • Diaz- Lara, A.; Wunderlich, L.; Nouri, M. T.; Golino, D.; M., & Al Rwahnih (2022). Incidence and detection of negative-stranded RNA viruses infecting apple and pear trees in California. Journal of Phytopathology. 170, 15-20.
  • Souto, C.; Lagos, O.; Holzapfel, E.; Lal Maskey, M.; Wunderlich, L.; Shapiro, K.; Marino, G.; R. Snyder, R.; Zaccaria, D. (2019). A Modified Surface Energy Balance to Estimate Crop Transpiration and Soil Evaporation in Micro-Irrigated Orchards. Water. 11:1747.
  • Zaccaria, D.; Wunderlich, L.; Marino, G.; Shapiro, K.; Rice, S.; Snyder, R. (2019). Effect of topography on actual evapotranspiration and vine water status in hillside vineyards. 20th International Meeting of Viticulture GiESCO Proceedings.
  • Wunderlich, L.R.; Niederholzer, F. J.; Smith, R.J.; Strimiska, 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.
  • Diaz-Lara, A.; Klaassen, V.; Stevens, K.; Sudarshana, M.R.; Rowhani, A.; Maree, H.J.; Chooi, K.M.; Blouin, A.G.; Habili, N.; Song, Y.; Aram, K.; Arnold, K.; Cooper, M.L.; Wunderlich, L.; Battany, M.C.; Bettiga, L.J.; Smith, R.J.; Bester, R.; Xiao, H.; Meng, B.; Preece, J.E.; Golino, D.; Al Rwahnih, M. (2018). Characterization of grapevine leafroll associated virus 3 genetic variants and application towards RT-qPCR assay design. PLoS ONE. 13:12, e0208862.
  • Wunderlich, L.; Bollinger, M.L.; Shaffer, M.; Preto, C.R.; Bahder, B.; Zalom, F.G.; Sudarshana, M. (2017). Investigating the Spread and Effect of Grapevine Red Blotch Virus in California-Grown Zinfandel. 20th International Meeting of Viticulture GiESCO Proceedings. 1:20, 215.
  • Wistrom, C. M.; Blaisdell, G. K.; Wunderlich, L.R.; Botton, M.; Almeida, R.P.P.; daane, K.M. (2017). "No evidence of transmission of grapevine leafroll associated viruses by phylloxera (Daktulosphaira vitifoliae)." European Journal of Plant Pathology 147(97)
  • Wistrom, C. M.; Blaisdell, G. K.; Wunderlich, L. R.; Almeida, R. P.P.; Daane, K. M. (2016). "Ferrisia gilli (Hemiptera: Pseduococcidae) Transmits Grapevine Leafroll-Associated Viruses." Journal of Economic Entomology 109(4): 1519-1523.
  • Wunderlich, L.; Zaccaria, D.; Shackel, K.; Snyder, R. (2015). "Effect of slope and aspect on vine water use and stress." 19th International Meeting of Viticulture GiESCO Proceedings No. 19(Vol. 1): 262-265.
  • Wunderlich, L.R.; Caprile, J.L.; Vossen, P.M.; Varela, L.G.; Grant, J.A. (2015) UC IPM Apple Pest Management Guidelines for Agriculture: Insects and Mites. UC ANR Publication 3432.
  • Haviland, D.; Wunderlich, L.; Daane, K. (2013). Ferrisia (Gills Mealybug). Grape Pest Management.L. Ferguson. Oakland, CA, UC ANR. Publication 3343
  • Wunderlich, L.; Cooper, M.; Daane, K. (2013). "Seasonal biology of Ferrisia gilli (Hemiptera: Pseudococcidae) in California Sierra Foothill Vineyards." Journal of Economic Entomology 106(4): 1716-1725.
  • Burrack, H.; Bingham, R.; Price, R.; Connell, J.; Phillips, P.; Wunderlich, L.; Vossen, P.; O'Connell, N.; Ferguson, L.; Zalom, F. (2011). "Understanding the seasonal and reproductive biology of olive fruit fly is critical to its management." California Agriculture 65(1): 14-20.
  • Daane, K.; Cooper, M.; Triapitsyn, S.; Walton, V.; Yokota, G.; Haviland, D.; Bentley, W.; Godfrey, K.; Wunderlich, L. (2008). "Vineyard managers and researchers seek sustainable solutions for mealybugs, a changing pest complex." California Agriculture 62(4): 167-176.
  • Janousek, C.; Lorber, J.; Varga, Z.; Gubler, W.; Wunderlich, L. (2007). Fungicide control of scab in Red Delicious apple in the Sierra foothills, California, 2007. Plant Disease Management Reports. 2: PF051.
  • Caprile, J.; Wunderlich, L.; Vossen, P.; Coates, W.; Andris, H.; Varela, L.; Bentley, W. (2006). Apple. UC IPM Pest Management Guidelines. UC ANR. Publication 3432.
  • Wunderlich, L.; Giles, D. (1999). "Field Assessment of Adhesion and Hatch of Chrysoperla Eggs Mechanically Applied in Liquid Carriers." Biological Control 14: 159-167.
  • Giles, D.; Wunderlich, L. (1998). "Electronically-Controlled Delivery System for Beneficial Insect Eggs in Liquid Suspensions." Transactions of the American Society of Agricultural Engineers 38(5): 1289-1296.

Non-Peer Reviewed

  • Wunderlich, L. (2021). “Christmas Tree Stump Culture: Mimicking Nature for Choose N’Cut Success.”. Great Lakes Christmas Tree Journal. 17:1, 26-31.
  • Wunderlich, L. (2020). "Smoke in a Bottle". Foothill Fodder Blog, September 11, 2020. https://ucanr.edu/blogs/FoothillAg/.
  • Wunderlich, L. and Niederholzer (2020). “Airblast Sprayer Calibration.”. eXtension campus website at https://campus.extension.org/.
  • Wunderlich, L.; Hoheisel, G.; Niederhozler, F. (2020). “Opportunities to Train Applicators to Improve Spray Coverage: Case Studies from Washington and California.”. Proceedings of the 95th Annual Orchard Pest and Disease Management Conference, January 8-10, 2020, Portland, Oregon.
  • Wunderlich, L. (2020). “Training California’s Pesticide Applicators to Reduce Drift Near Schools.”. Final Report. Pest Management Alliance DPR Grant No. 17-PML-G002. Sept. 1, 2017 - Dec. 31, 2020.
  • Wunderlich, L. (2020). Researchers Continue Red Blotch Vector Search. Foothill Fodder Blog, August 27, 2020. https://ucanr.edu/blogs/FoothillAg/.
  • Wunderlich, L. (2019). Airblast sprayer adjustments for seasonal canopy changes. Applicator Alerts. 4:2, 3-4.
  • Wunderlich, L. (2019). Drilling for Microbial Gold: Eskalen Lab Researchers Seek Biocontrol Agents for Canker Disease. Foothill Fodder Blog, August 15, 2019.
  • Wunderlich, L. (2019). Look to the soil to determine property potential. Foothill Fodder Blog July 18, 2019. http://cecentralsierra.ucanr.edu/Agriculture/Foothill_Fodder/
  • Wunderlich, L. (2019). Maximizing the Efficiency of Airblast Spraying. Progressive Crop Consultant. November/December, 32-37.
  • Wunderlich, L. (2019). Precision Agriculture: 21st Century Sustainability. Foothill Fodder Blog, July 24, 2019. http://ucanr.edu/blogs/FoothillAg/
  • Snyder, R. L.; Spano, D.; Zaccaria, D.; Marino, G.; Wunderlich, L. (2019). Slope, aspect, and row orientation effects on crop coefficients. IX International Symposium on the Irrigation of Horticultural Crops, June 17-20, 2019, Matera, Italy. 88.
  • Wunderlich, L.; Milliron, L. (2019). Spray Application. Growing the Valley podcast. February 18. http://growingthevalleypodcast.com
  • Wunderlich, L.; Niederholzer, F.; Blecker, L.; Smith, R.; Bolton, S. (2019). Survey reveals training needs for airblast sprayer operators. 21st International Meeting of Viticulture GiESCO June 23-28, 2019, Thessaloniki, Greece. 262.
  • Wunderlich, L. (2018). 2018 Vintage Report. UCCE Central Sierra e-newsletter.
  • Wunderlich, L. (2018). Is it a Spray Day? How weather conditions influence airblast spray deposition and coverage. CAPCA Adviser. 21:5, 62-66.
  • Wunderlich, L. (2018). Phylloxera: a Foothill Pest Whose Time Has Come. Foothill Fodder Blog. June 17, 2018. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=27493
  • Wunderlich, L. (2018). Safari Vineyard Tailgate Meeting. Handout.
  • Wunderlich, L. (2018). Spring 2018 Weather Confounds:Lack of Chill for Trees, Frost Damage in Grapes. UCCE Central Sierra e-newsletter.
  • Wunderlich, L. (2018). Training California's Pesticide Applicators to Reduce Drift Near Schools-1 year Progress Report Pest Management Alliance Grant. California Department of Pesticide Regulation.
  • Wunderlich, L. (2018). Vole with a "V". Foothill Fodder Blog. May 17, 2018. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=27207
  • Wunderlich, L. (2016). Foothill Fodder. http://ucanr.edu/blogs/FoothillAg/.
  • Nguyen, T.; Morris, N.S.; Wunderlich, L.; Gubler, W. D. (2016). Fungicide control of apple scab: 2016 field trial. http://plantpathology.ucdavis.edu/fruitcropfungicidetrials, University of California Cooperative Extension, Department of Plant Pathology, Davis. CA.
  • Wunderlich, L.; Zaccaria, D.; Shackel, K.; Snyder, R. (2016). Investigating the Effect of Topography on Vine Water Use (ET) and Vine Stress. 67th American Society for Enology and Viticulture.
  • Wunderlich, L. (2016). Maintain Your Irrigation System to Improve Peformance. Foothill Fodder Blog. April 19, 2016. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=20782
  • Zalom, F.; Smith, R.; Wunderlich, L.; Sudarshana, M. (2016). National Pest Alert: Grapevine Red Blotch-Associated Virus. Regional IPM Center.
  • Wunderlich, L. (2016). To Spray or Not To Spray: Using the Powdery Mildew Index. Foothill Fodder Blog. May 4, 2016. https://ucanr.edu/blogs/blogcore/postdetail.cfm?postnum=20949
  • Wunderlich, L. (2016). U.C. Researchers Find Vector for Red Blotch in Grapes. Western Farm Press. http://westernfarmpress.com/grapes/uc-researchers-find-vector-red-blotch-grapes, Penton.
  • Wunderlich, L.; Klonsky, K.; Stewart, D. (2015). 2015 Sample costs to establish a vineyard and produce wine grapes: Sierra Nevada Foothills.
  • Wunderlich, L.; Hembree, K. (2014). Demonstrating drift-reducing nozzles for adoption in foothill vineyards.
  • Wunderlich, L. (2014). From Recommendation to Application: How PCAs Can Help Minimize Drift, Ensure Coverage. CAPCA Adviser. Sacramento, Ca, California Association of Pest Control Advisers. XVII:1, 30-33. February, 2014.
  • Gubler, W.D.; Nguyen, T.T.; Morris, N.S.; Wunderlich, L.R. (2014). Fungicide Control of Apple Scab 2014 Field Trial. University of California Cooperative Extension, Department of Plant Pathology, University of California Davis. October, 2014. http://plantpathology.ucdavis.edu/fruitcropfungicidetrials
  • Wunderlich, L. (2014). Thoughts for farming during drought. Ag Advocate, El Dorado County Farm Bureau.
  • Wunderlich, L. (2014). Vintage 2013: Amador, El Dorado, Calaveras and Tuolumne Counties. Wines and Vines. Sonoma, Ca, Wine Communications Group. 95:1. January, 2014.
  • Daane, K.; Cooper, M.; Almeida, R.; Golino, D.; Smith, R.; Wunderlich, L. (2013). Mealybug pests and an emerging viral disease: Vector ecology and their role in grape leafroll associated virus epidemiology. Annual Report to the American Vineyard Foundation. Proposal #2013-815.
  • Wunderlich, L. (2013). Vintage 2012: Amador, El Dorado, Calaveras and Tuolumne Counties. Wines and Vines. 101. January.
  • Bay, I.; Wunderlich, L.; Nguyen, T.; Gubler, W. (2012). Fungicide control of apple scab: 2012 field trial. http://ucanr.edu/sites/plp/Cooperative_Extension/Gubler/fungtrials2012/
  • Wunderlich, L.; Daane, K. (2011). Field evaluation of insecticides for managing Gill's mealybug, Ferrisia gilli, in vineyards. Annual Entomology Society of America Meeting, Hawaii.
  • Bay, I.; Eynard, J.; Wunderlich, L.; Nguyen, T.; Doody, R.; Gubler, W. (2011). Fungicide control of apple scab: 2011 field trial. http://plantpathology.ucdavis.edu/ext/gubler/fungtrials2011/
  • Wunderlich, L.; Daane, K. (2010). Biology and management of Gill's mealybug, Ferrisia gilli, an emerging mealybug pest of wine grapes in California's Sierra foothills. Abstracts of the 2010 Annual Western Orchard Pest and Disease Management Conference.
  • Wunderlich, L.; Cooper, M.; Daane, K. (2009). Gill's mealybug, Ferrisia gilli (Hemiptera: Pseudococcidae), an emerging pest of wine grapes in California's Sierra foothills. Entomological Society of America Meeting.
  • Wunderlich, L. (2009). Mealybugs in vineyards: identifying, monitoring and managing. CAPCA Adviser. 7:1, 36-41.
  • Peterson, R.; Wunderlich, L.; Firestein, K.; Morrison, B.; Sutter, S. (2008). Association Disclosure Statement and Information Packet Regarding the Proposed Restructuring of the Placerville Fruit Growers Cooperative to a Subchapter S Corporation: "Placerville Fruit Growers Incorporated" ("PFGI"). Prepared for and approved by the PFGA board.
  • Wunderlich, L.; Chastagner, G. (2008). Challenges to managing Phytophthora root rot in California's Sierra foothills. Proceedings of the 8th International Christmas Tree Research and Extension Conference, Horsholm, Forest & Landscape Working Papers.
  • Janousek, C.; Wunderlich, L.; Gubler, W. (2008). Synthetic and organic fungicide control of apple scab: 2008 field trial. http://plantpathology.ucdavis.edu/faculty/gubler/lab/index.html
  • Wunderlich, L.; Klonsky, K.; DeMoura, R. (2007). Sample costs to establish and produce apples-Fuji variety.
  • Wunderlich, L. (2006). Evaluating granulosis virus (Cyd-X) and acetamiprid (Assail) for season-long control of codling moth in apples: results from two years of field studies. Abstracts of the 80th Annual Western Orchard Pest and Disease Management Conference.
  • Wunderlich, L. (2005). Christmas tree production in the California Sierra Foothills. Seventh International Christmas Tree Research and Extension Conference Program & Abstracts.
  • Wunderlich, L.; Fake, C.; Klonsky, K.; DeMoura, R. (2005). Sample Costs to Produce Christmas Trees. Choose and Cut Tree Farm.
  • Wunderlich, L. (2004). Determining codling moth (Cydia pomonella) sex and mating status.
  • Wunderlich, L. (2004). Integrating Assail into Sierra Foothill Apple Pest Management Programs for Codling Moth and Leafhopper Control. Western Orchard Pest and Disease Management Conference Abstracts.
  • Wunderlich, L. (2004). Watershed Evaluation Report. Sacramento River Watershed Evaluation Report. El Dorado County Agricultural Watershed Group of Sacramento Valley Watershed Coalition. 4.9. April.
  • Wunderlich, L. (2003). Understanding and managing Phytophthora root rot in Doug and True Firs. UCCE. Publication EDA-4-03.
  • Wunderlich, L. (2003). Why we need a Farm Advisor. U.C. Cooperative Extension's history in El Dorado County: a rich past, an uncertain future. Ag Advocate, El Dorado County Farm Bureau Newsletter. Spring/Summer, 8.
  • Wunderlich, L. (2002). Chemical thinning in stone fruits grown in the Sierra foothill region. 2002 Annual Report of the California Tree Fruit Agreement. 33.
  • Wunderlich, L. (2000). Field Assessment of Mechanical Release of Green Lacewing Eggs (Chrysoperla rufilabris) for Management of Lettuce Aphid (Nasonovia ribis-nigri). Sustainable Agriculture:Continuing to Grow.

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