Patty Skinkis
Associate Professor, Viticulture Extension Specialist

My research focuses on sustainable practices including canopy, yield and vineyard floor management, and the impact that these practices have on fruit composition, wine quality and production efficiency. My Extension activities include developing statewide programs and outputs by communicating with regional Extension faculty in winegrape regions of the state. In doing so, we develop strong outreach programs and materials to meet the needs of the Oregon winegrape industry.


Read more about Patty's research here

OSU Campus
Department of Horticulture
Oregon Wine Research Institute
4017 Ag and Life Sciences Bldg
Corvallis, OR 97331-7304
United States
(541) 737-1411


I conduct applied research that focuses primarily on issues faced by Oregon winegrape growers, including vigor management, canopy and yield managment practices and how they influence vine health, vineyard productivity, fruit composition and wine quality. I also conduct research on quantifying canopy architecture and how vineyard metrics can be developed and used by industry. Another area of research includes understanding how growers (vineyard managers, viticulturists, etc) and wineries (winemakers, etc) make decisions in their production systems and understanding outreach needs and methods to enhance our impact.


  • Hort 454:  Principles & Practices of Vineyard Production (2008 - present)
  • Hort 481/581: Horticultural Production Case Studies (2018)



B.S. Horticulture, University of Wisconsin – River Falls 2002

Ph.D. Horticulture (Viticulture), Purdue University 2006


2013 - Present:  Associate Professor & Viticulture Extension Specialist, Oregon State University

2007 - 2012:  Assistant Professor & Viticulture Extension Specialist, Oregon State University

2003 – 2006:  Graduate Research Assistant, Department of Horticulture, Purdue University

Core faculty member of Oregon Wine Research Institute (OWRI) at Oregon State University (2010-Present)

Service to the Profession

Chair, Willamette Valley Viticulture Tech Group, 2008-present
Chair, OSU Viticulture Extension Working Group, 2007-present

Member, technical committee, Low-Input Viticulture & Enology (LIVE) certification program, 2008-present
Member, Oregon Wine Symposium planning committee, 2007-present
Director, Board of Directors of American Society for Enology and Viticulture, 2009-2012; 2015-present

Member, National Grape & WIne Initiative Integrated Production Systems Committee, 2017-present

Member, National Viticulture & Enology Extension Leadership Working Group 2007-present

University Service

Member, curriculum committee, Horticulture Dept OSU, 2007-present
Member, search committees for faculty positions within the Department of Horticulture and Oregon Wine Research Institute (2007-2013)

Member, core faculty of the Oregon Wine Research Institute, 2010-present

Professional Memberships

American Society for Horticultural Science (ASHS)
International Society for Horticultural Science (ISHS)
American Society for Enology and Viticulture (ASEV)
American Wine Society (AWS)
Oregon State University Extension Association (OSUEA)

I accept graduate students for Horticulture


Refereed Publications

Reeve, A.L, P.A. Skinkis, A.J. Vance, K.R. McLaughlin, E. Tomasino, J. Lee, and J.M. Tarara. 2018. Vineyard Floor Management and Cluster Thinning Inconsistently Affect ‘Pinot noir’ Crop Load, Berry Composition, and Wine Quality. HortScience. 53: 318-328.

Schreiner, R.P., J. Osborne, and P.A. Skinkis. 2018. Nitrogen requirements of Pinot noir based on growth parameters, must composition, and fermentation behavior. Am. J Enol. Vitic. 69: 45-58

P.A. Skinkis and K.M. Gregory. 2017. Spur pruning may be a viable option for Oregon Pinot noir producers despite industry fears of lower productivity. Catalyst. 2: 62-72.

Feng, H., P.A. Skinkis, and M.C. Qian. 2017. Pinot noir wine volatile and anthocyanin composition under different levels of vine fruit zone leaf removal. Food Chemistry. 214: 736-744.

Reeve, A.L., P.A. Skinkis, A. Vance, J. Lee, and J. Tarara. 2016. Vineyard floor management influences 'Pinot Noir' vine growth and productivity more than cluster thinning. HortScience. 51: 1-12.

Uzes, D.M. and P.A. Skinkis. 2016. Factors influencing yield management of Pinot Noir vineyards in Oregon. Journal of Extension.54:3.

Howland, A.D., P.A. Skinkis, J.H. Wilson, E. Riga, J.N. Pinkerton, R.P. Schreiner, and I.A. Zasada. 2015. Impact of grapevine (Vitis vinifera) varieties on reproduction of the northern root-knot nematode (Meloidogyne hapla). J. of Nematology. 47: 141-147.

Feng, H., F. Yuan, P.A. Skinkis, and M.C. Qian. 2015. Influence of cluster zone leaf removal on Pinot noir grape chemical and volatile composition. Food Chemistry. 173: 414-423.

Schreiner, R.P., P.A. Skinkis, and A.J. Dreves. 2014. A rapid method to assess grape rust mites on leaves and observations from case studies in western Oregon vineyards. HortTechnology. 24: 38-47. 

Lee, J. and P.A. Skinkis. 2013. Oregon 'Pinot noir' grape anthocyanin enhancement by early leaf removal. Food Chemistry. 139: 893-901.

Schreiner, R.P. , J. Lee, and P.A. Skinkis. 2013. N, P, and K supply to Pinot noir grapevines. I. Impact on vine nutrient status, growth, physiology, and yield. Am. J. Enol. Vitic. 64: 26-38.

Gouthu, S., P.A. Skinkis, J. Morre, C.S. Maier, L.G. Deluc. 2012. Berry nitrogen status altered by cover cropping: Effects on berry hormone dynamics, growth, and amino acid composition of Pinot noir. Food Chemistry. 135: 1-8.

Fredrikson, L.J., P.A. Skinkis, E. Peachey. 2011. Effect of cover crop management techniques on weed control in establishing a vineyard. HortTechnology. 21:208-216.

Walton V. M., Dreves A. J., Coop L.B., Jones G.B, P.A. Skinkis. 2010. Developmental Parameters and Seasonal Phenology of Calepitrimerus vitis (Acari: Eriophyidae) in Wine Grapes of Western Oregon. Environ. Entomol. 39 (6). DOI: 10.1603/ENO09197.

Skinkis, P.A., B.P. Bordelon, and E. Butz. 2010.Effects of sunlight exposure on berry and wine monoterpenes and sensory characteristics of Traminette . Am. J. Enol. Vitic. 61:2. 147-156.

Skinkis, P.A., B.P. Bordelon, K.V. Wood. 2008. The Identification and Quantitative Analysis of Monoterpenes in Traminette, Gew├╝rztraminer and Riesling Grapes. Am. J. Enol. Vitic. 59: 440–445.

Bordelon, B.P, P.A. Skinkis, P.H. Howard. 2008. Impact of Training System on Vine Performance and Fruit Composition of Traminette. Am. J. Enol. Vitic. 59: 39-46.

Walton, V., A.J. Dreves, D.H. Gent, R.R. Martin, U. Chambers, P.A. Skinkis. 2007. Relationship Between Rust Mites, Calepitrimerus vitis (Acari: Eriophyidae), Bud Mites, Colomerus vitis (Acari: Eriophyidae) and Short Shoot Syndrome in Oregon Vineyards. Internat. J. Acarol. 33: 1-12.

Outreach and Extension

Extension Publications

Skinkis, P., J.W. Pscheidt, E. Peachey, A.J. Dreves, V.M. Walton, and C. Kaiser. 2018. 2018 Pest Management Guide for Wine Grapes in Oregon. Oregon State University Extension Service. EM 8413.

Skinkis, P., V. Walton, A.J. Dreves, C. Kaiser, S. Renquist, S. Castagnoli, R. Hilton, and L. Brewer. 2016. Recognize the Symptoms and Causes of Stunted Growth in Vineyards. Oregon State University Extension Service. EM8975. (PDF and app)

Kennedy, M. and P. Skinkis. 2016. Are Your Weed-Control Products Damaging Nearby Vineyards? Oregon State University Extension Service. EM 9132.

Skinikis, P. 2014. Establishing a Vineyard in Oregon: A Quick-start Resource Guide. Oregon State University Extension Service. EM 8973.

Skinkis, P.A. and A.J. Vance. 2013. Understanding Vine Balance: An important concept in vineyard management. Oregon State University Extension Service. EM 9068.

Vance, A.J., A.L. Reeve, and P. A. Skinkis. 2013. The Role of Canopy Management in Vine Balance. Oregon State University Extension Service. EM 9071.

Skinkis, P.A. and R.P. Schreiner. 2013. How to Measure Grapevine Leaf Area. Oregon State University Extension Service. EM 9070.

Skinkis, P.A. 2013. How to Measure Dormant Pruning Weight of Grapevines. Oregon State University Extension Service. EM 9069.

Skinkis, P.A. and A.L. Reeve. 2013. Lateral Crop Production: Vine rebellion against imbalance. Practical Winery & Vineyard Journal, August 2013: 81-84.

Field Guide for Integrated Pest Management in Pacific Northwest Vineyards. Pacific Northwest Extension Publication: Washington State University, Oregon State University, University of Idaho. (Skinkis, P.A. contributing author, 2013).

Moyer, M., C. Kaiser, J. Davenport, and P. Skinkis. 2012. Considerations and resources for vineyard establishment in the inland Pacific Northwest. Pacific Northwest Extension Publication, PNW634.

Skinkis, P.A., and R.P. Schreiner. 2011. Grapevine Nutrition. Oregon State University Extension Service, EM 9024.

Skinkis, P.A. 2010. Herbicides and Grapevines: Understanding the Risks. Online educational module and diagnostic tool. Oregon State University Extension Service.

Walton, V., A. Dreves, P. Skinkis, C. Kaiser, M. Buchanan, R. Hilton, R.R. Martin, S. Castagnoli, S. Renquist. Oct 2009. Grapevine Leafroll Virus and Mealybug Prevention and Management in Oregon Vineyards. Oregon State University Extension Service EM8990 (English) and EM8990S (Spanish).

Skinkis, P.A., A.J. Dreves, V.M. Walton and R.R. Martin. July 2009. Field Monitoring for Grapevine Leafroll Virus and Mealybug in Pacific Northwest Vineyards. Oregon State University Extension Service EM8985 (English) and EM8985S (Spanish).

Walton, V., P. Skinkis, A. Dreves, C. Kaiser, S. Renquist, S. Castagnoli, R. Hilton. 2009. Grapevine Growth Distortions: A Guide to Identifying Symptoms. OSU Extension Service EM 8975-E.

Skinkis, P., V. Walton, C. Kaiser. 2009. Grape Phylloxera: Biology and Management in the Pacific Northwest. OSU Extension Service EC1463.

Julian, J.W., C.F. Seavert, C. Kaiser, P.A. Skinkis. 2009. Vineyard Economics: Establishing and Producing Cabernet Sauvignon Wine Grapes in Eastern Oregon. OSU Extension service EM8974-E.

J.W. Julian, C.F. Seavert, P.A. Skinkis, P. VanBuskirk, S. Castagnoli. 2008. Vineyard Economics: Establishing and Producing Pinot Noir Wine Grapes in Western Oregon. OSU Extension Service EM8969-E.

Kaiser, J.W. Pscheidt, V.Walton and P. Skinkis. 2008. How to Reduce the Risk of Pesticide Resistance in Winegrape Pests in Oregon. OSU Extension Service EM8968.

Kaiser, C., P. Skinkis, M. Olmstead. 2008. Protecting Grapevines from Winter Injury. OSU Extension Service. PNW 603-E.

Walton, V., A. Dreves, P. Skinkis. 2007. Short Shoot Syndrome of Grapes in the Pacific Northwest. OSU Extension Service EM8944-E.

Oregon Wine Research Institute (OWRI) Publications

Author and editor of the OWRI Viticulture & Enology Technical Newsletter

Author for articles in the OWRI Vine to Wine monthly newsletter. Sign up here to receive these e-newsletters.

Website - Online Publications

Co-editor and contributor of the Oregon Wine Research Institute Website (

Member, contributor, author, and reviewer of Grape Community of Practice content on eXtension (


Awards and Honors

Extension Distinction Award, American Society for Enology & Viticulture, 2018

Outstanding Young Alumni Award, University of Wisconsin-River Falls, 2017

Early Career Service Award, Epsilon Sigma Phi (ESP),  2016

Visionary Horticulturist Award – American Society of Horticultural Science, eXtension Working Group, 2014

Outreach & Engagement Award, Oregon State University, 2012

Oregon Outstanding Service Award, Oregon Wine Board, 2011

Savery Young Faculty Award, OSU College of Agriculture Science, 2010

Search for Excellence Award, Oregon State University Extension Association, 2009