Pests and Diseases

Red Blotch Disease

Federal disaster program pays growers to remove infected

California grapegrowers whose vineyards are affected by the
Grapevine Red Blotch-associated Virus, in Sonoma County, may
be eligible for financial aid to replace infected vines under
a relatively new program attached to the 2014 Farm Bill. The
aim is to ameliorate the effects and limit the spread of the
still-mysterious red blotch virus in many of the state’s major
grape-producing counties. The aid comes under the Farm Bill’s
Tree Assistance Program (TAP), which provides financial
assistance to growers whose vines are damaged by “natural

Before starting the process to receive TAP disaster relief,
Marianne Morton, executive director of the Napa/Solano County
USDA Farm Service Agency (FSA), advised that growers must
verify red blotch is present where suspected.

Specimens must be submitted to an approved commercial lab for

Further, she summarized:

  • Vines cannot be removed before inspection by a Farm Service
    Agency (FSA) employee. Your county FSA will send a loss
    adjuster to visually inspect the vines.
  • Producers may receive assistance for a maximum of 500 acres
  • The first 15% of loss is not covered.
  • Maximum payment rates: $4 per vine replacement; $2 per vine
    planting; $500 per acre for site preparation.

Locate the closest FSA Service Center Office near you.

Glassywinged Sharp Shooter

Sonoma County Winegrape Commission received funding from EPA
for a Vine Mealybug research project. To read the Final Grant
Report, please see link:

Glassywinged Sharp Shooter

California Department of Foods and Agriculture GWSS Home Page.
Daily GWSS updates included on this site. Recent detections
and actions taken included on daily updates.

University of California Agriculture & Natural Resources
Homepage. Glassy-Winged Sharpshooter Media Kit contains up to
date news releases and UC Pierce’s Disease Research and
Emergency Response Task Force information.

List of Integrated Pest Management information available from
U.C. Ventura. GWSS information and detailed photos available.

From UC Davis: