Red Blotch Disease and the Virus Status of CDFA-certified Grapevine Stock

August 25th, 2014
Red Blotch Disease and the Virus Status of CDFA-certified Grapevine Stock

The Discovery of Grapevine Red Blotch-associated Virus (GRBaV, Red Blotch) in 2012 focused the industry on Red Blotch disease—an unknown condition with recognizable symptoms that growers had been aware of for some time. GRBaV has been found in new planting materials as well as in established vineyards in California and several other winegrowing states in the U.S. During the past 18 months, in an effort to curb disease spread, key stakeholders…

View More

Late-season Mite Infestations and Management

August 18th, 2014
Late-season Mite Infestations and Management

Every year in Lodi there are a few vineyards that have a late-season infestation of spider mites, especially the Pacific spider mite. By late-season I mean late August or September. Typically the grower’s attention during that time period is shifting to harvest and there is the question of whether or not the mite infestation needs to be treated. One might think that the mite population will continue to increase throughout…

View More

How California Farms Measure Up in the 2012 Census of Agriculture: Smaller in Size with Higher Value of Production

August 11th, 2014
How California Farms Measure Up in the 2012 Census of Agriculture:  Smaller in Size with Higher Value of Production

The 2012 Census of Agriculture was released in early May 2014. Average farm size continues to grow in terms of acreage and market value of production. However, this trend is not universal across crop category or geographic region. For the crop category of Land Used for Vegetables, the average acreage allocation per farm reporting production in this category decreased, while certain counties in California experienced an increase in the average…

View More

Regulated Deficit Irrigation – Part II

August 4th, 2014
Regulated Deficit Irrigation – Part II

Part I of this series presented basic concepts of regulated deficit irrigation (RDI), early season soil moisture management, and the vine component of the soil-vine-atmosphere moisture continuum. In this posting, we will explore the other components of the continuum and regulated deficit irrigation after vines reach full canopy. The dryness of the atmosphere, the second component of the continuum, drives vineyard water use by drawing moisture from the soil and…

View More
Event Calendar