Issue link: http://read.dmtmag.com/i/561374
ome years ago I wrote an article and presented informa- tion on grapevine clean plant- ing stock and the California 2010 Registration and Certification (R&C) program administered by the California Department of Food and Agriculture (CDFA). Since the adop- tion of the new regulations, known as Protocol 2010, a new founda- tion block was planted and progeny material is slowly becoming avail- able to growers. This article will focus on the challenges of certification and reg- istration programs, and provide guidelines to growers for planting healthy vines. CALIFORNIA GRAPEVINE CERTIFICATION PROGRAM The California R&C program was revised and a new state law written in 2010. The Protocol 2010 regulations include specific rules for traceability back to the original foun- dation blocks, distance of increase + Due to the discovery of Grapevine red blotch-asso- ciated virus, the California Registration and Certifica- tion (R&C) program is being reviewed + New technology may replace the current bio- logical indexing technique considered to be the gold standard in grapevine cer- tification and quarantine programs. + Planning ahead for new plantings allows growers to order diagnostic tests using the correct sample type dur- ing the appropriate season. + Testing composite samples comprised of cuttings from many vines can dilute the virus below detectable levels. AT A GLANCE G r a p e v i n e R e g i s t r a t i o n a n d C e r t i f i c a t i o n P r o g r a m U n d e r R e v i e w Red blotch-associated virus in California certified planting material opens discussion This vine is infected with grapevine red blotch-associated virus. Photo: Judit Monis BY DR. JUDIT MONIS 7 0 V I N E YA R D & W I N E RY M A N A G E M E N T | S e p t - O c t 2 015 w w w. v w m m e d i a . c o m