Cooperative Extension San Joaquin County
University of California
Cooperative Extension San Joaquin County

Viticulture (Grapes)

San Joaquin County grape production in 2010 totaled $248,987,000, making grapes the number two agricultural commodity in the county after milk. Wine grape production brought in $248,666,000. There are currently more than 98,700 acres of vineyards and 52 bonded wineries. As the Lodi American Viticultural Area (AVA) receives more recognition for quality premium varietal wines, the local industry continues to grow, along with wine producing areas in the Delta and South County area. There is a small segment of the vineyards producing table grapes for fresh consumption; however, the main production is in wine grapes. There are about 800 grape growers in the county with an average vineyard size of 105 acres.

My viticulture program focuses on informal education, field research and problem diagnosis. Meetings, county publications and newsletters are included. With cooperation of the Lodi-Woodbridge Winegrape Commission (LWWC), we conduct regular grower meetings as well as the annual Lodi Grape Day that helps inform growers and the community about the latest progress in research. Another successful educational effort has been the LWWC breakfast meetings, where monthly group meetings are literally held in farmers' homes to discuss methods, utilizing Integrated Pest Management (IPM), irrigation, and grape production. Field research includes experiments in resistant rootstocks for soil pests, variety and clone evaluation trials, trellis system comparisons, pest management with environmentally safe chemicals, and vineyard irrigation management for increased quality.

Contact Info

Paul Verdegaal, Viticulture & Almond Advisor



Along the Grapevine Newsletter

Maximizing the Efficiency of Airblast Spraying (113KB)
66th Annual Lodi Grape Day (2,554KB)
2017 Flooded Orchards and Vineyards News Extra (958KB)
Meeting Notice: 65th ANNUAL LODI GRAPE DAY (775KB)
sharing a Meeting Notice from the Almond Digest (481KB)
MEETING NOTICE: Vineyard Herbicide Trial Field Meeting (184KB)
Meeting Notice 63rd Annual Lodi Grape Day (801KB)
UC Davis Viticulture & Enology On-the-Road in Lodi (722KB)
Cold and Dry Thoughts for 2014 (714KB)
Pancake Breakfast and Healthcare Reform for Ag Employers Update
Wood-Canker Disease Management Survey (716KB)
March 2013 (4,535KB)
60th Annual Lodi Grape Day (218KB)
March 2010 Along The Grapevine
58th Annual Lodi Grape Day
57th Annual Lodi Grape Day
Cost Study 2008 - Crush District 11 (Lodi Winegrape Commission)
Lodi Regional Research Roadshow
56th Annual Lodi Grape Day
55th Annual Lodi Grape Day
54th Annual Lodi Grape Day
53rd Annual Grape Day
July 2004
February 2004
July 2003
April 2003
View All

Welcome to the Vines and Ovines Blog
Welcome to the Vines and Ovines Blog. Feel free to post comments, questions, photos, and tips.   Thanks, Roger Ingram 530.889.7385

Webmaster Email: