Merilark Padgett-Johnson Santa Rosa Junior College Phone: (707) 527-4987 Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Course(s): VIN 111 - Introduction to Viticulture and Vineyard Establishment Website: http://online.santarosa.edu/homepage/mpadgettjohnson/ |
Education:
|
PhD, Plant Biology - University of California, Davis Dissertation: Vine water relations, gas exchange, growth and root distribution of several Vitis species under irrigated and non-irrigated conditions. Advisor: Dr. L.E. Williams. MS, Horticulture - University of California, Davis Thesis: Changes in grape berry exudates during fruit development and their effect on germination of Botrytis cinerea conidia. Advisor: Dr. J.C. Morrison. BS, Plant Science (Viticulture Option) - University of California, Davis |
Experience:
|
2006 - Present |
Instructor/Viticulture Program Coordinator, Santa Rosa Junior College |
|
1999 - 2006 |
Instructor/Viticluture/Enology Program Coordinator, Allan Hancock College, Santa Maria, CA |
|
1989 - present |
Vineyard Management Consultant
|
|
1994 - 1997 |
Research Assistant University of California Cooperative Extension |
|
1984 - 1987 |
Teaching Assistant, Department of Viticulture & Enology University of California, Davis |
| 1984 - 1987 |
Vineyard Manager, Bonny Doon Vineyard, Santa Cruz, CA |
|
PROFESSIONAL MEMBERSHIPS |
|
| Sonoma County Vineyard Technical Group (Board of Director Member) Sonoma County Winegrape Commission Sonoma County Farm Bureau Russian River Valley Winegrowers Association American Society for Enology and Viticulture Australian Society for Viticulture and Oenology California Association of Pest Control Advisors |
|
|
RESEARCH EXPERIENCE |
|
| PhD RESEARCH Determined which U.S. native Vitis species would likely be drought tolerant. Collected wood from germplasm repository; grew vines in experimental field plot. Grafts were made with some of the species and V. vinifera cv. Carignane. Field research techniques were focused on: including gas exchange measurements, water potential and its components, monitoring soil moisture and vine growth. |
|
| MS RESEARCH Developed a technique to remove exudate compounds from the grape berry surface, leaving the wax layer intact. Laboratory research techniques were focused on: including spectrophotometry, emission spectroscopy, and gas chromatography. Berry exudates were analyzed for specific compounds, and separated by thin layer chromatography (TLC). The TLC plates were used as a bio-assay for Botrytis cinerea conidial spore germination. |
|
|
PUBLICATIONS |
|
|
Ø Padgett-Johnson, M., L.E. Williams and M.A. Walker. "Vine Water Relations, Gas Exchange and Vegetative Growth of Seventeen Vitis Species Grown Under Irrigated and Non-irrigated Conditions in California", Journal of American Horticultural Science 128 (2):269-276, 2003. |
|
|
Ø Padgett-Johnson, M, L.E. Williams and M.A. Walker. 2000. The influence of Vitis riparia rootstock on water relations and gas exchange of Vitis vinifera cv. Carignane scion under non-irrigated conditions. American Journal of Enology and Viticulture 51:2 (2000). |
|
|
Ø "Reaping the Benefits of Cover Cropping in a Central Coast Vineyard", Practical Winery and Vineyard, March/April 2003. |
|
|
Ø "Developing a Farm Map" Publication # 8062, University of California, Division of Agricultural and Natural Resources, 2003. |
|
|
Ø "Effects of Rootstock on Chardonnay Vines", Western Fruit Grower, August 2002.
|
|
|
Ø "Evaluating Soil for Potential Vineyard Sites", Western Fruit Grower, October 2001.
|
|
|
Ø "2001 Viticultural Survey of Santa Barbara County"
|
|
|
Ø "2003 Viticultural Survey of San Luis Obispo County"
|
|
|
Ø "2004-2005 Viticultural Survey of Santa Barbara County"
|
|
|
Ø Padgett, Merilark and Morrison, Janice C. 1990. Changes in grape berry exudates during fruit development and their effect on mycelial growth of Botrytis cinerea. Journal of the American Society for Horticultural Science 115:269-273. |
|
|
PRESENTATIONS |
|
|
"Vineyard Design, Erosion Control and Best Management Practices", July 17, 2002; as part of the UC Davis Extension Short Course "Land Use, Environmental Regulation and the Wine Industry", San Luis Obispo, CA. |
|
|
Ø Closing Comments for the Syrah Symposium, June 27, 2001, American Society for Enology and Viticulture, San Diego, CA. |
|
|
Ø Guest lecture Cal Poly SLO Central Coast Winegrape IPM class “Grapevine viruses and bacterial diseases” April 2000, April 1999 and January 1998. |
|
|
Ø Grape Tech/Wine Tech Symposium “Grapevine rootstock species’ response to soil water deficits” 12 February 1998. |
|
|
Ø American Society for Enology and Viticulture “Root distribution of several Vitis species comparing irrigated and non-irrigated grapevines” 26 June 1996. |
|
|
Ø American Society for Enology & Viticulture “Water relations and gas exchange of a Vitis vinifera scion on V. riparia rootstock under non-irrigated conditions.” 22 June 1995. |
|
|
Ø Central Coast Winegrape Growers Association “Ant control in Central Coast vineyards infested with mealybugs” 14 June 1994. |
|
|
Ø American Society for Enology and Viticulture "Water relations of three Vitis Species in response to soil water deficits." 23 June 1993. |
|
|
Ø UC Davis Viticulture & Enology Joint Conference "Mechanisms of Drought Tolerance." 30 April 1992. |
|
|
Ø American Society for Enology and Viticulture "Changes in Grape Berry Exudates and their Effect on Germination of Botrytis cinerea conidia." 29 June 1989. |
|
