[TAP (REV. 4) OR AMEND 1] states that "The STC has approved Grapevine Red Blotch-associated Virus (GRBaV), commonly referred to as "Red Blotch", as an eligible plant disease for select counties in Oregon and California.  A claim of loss due to GRBaV must be verified through polymerase chain reaction (PCR) testing performed at a commercial laboratory."  In addition to red blotch, leafroll and Pierce's Diseases are also eligible under TAP.  For more information, please refer to the USDA fact sheet. A minimum of ten (10) symptomatic vines must be tested from each block claimed to be infected. This sampling, coupled with visual indicators identifiable to the FSA representative, will be used to determine the extent of damage. To apply for TAP, please contact your county USDA Farm Service Agency (FSA) offices. For tesing, please contact Agri-Analysis at info@agri-analysis.com or call us at (800)506-9852 ext 3.