Pierce's Disease
Research Updates

piercesdisease.cdfa.ca.gov

What is Pierce's Disease?

Pierce's Disease is a bacterial infection, which is spread by bugs that feed on grapevines, particularly the "glassy winged sharpshooter." Grapevines that become infected with PD can quickly become sick and die.

glassy-winged sharpshooter

A review of research and literature related to the origin and identity of the cultivars Plavac mali, Zinfandel and Primitivo (Vitis vinifera L.)


  • Author(s): Meredith, C; Mirosevic, Nikola;
  • Abstract: The origin of Zinfandel, the important California wine cultivar, has been a question for several decades. Although Zinfandel has been linked to both Primitivo, grown in southern Italy, and to Plavac mali in Croatia, the puzzle of its origin has never been solved. Many scientists and writers have applied themselves to this question. Many hypotheses have been proposed and some erroneous ideas have been widely accepted. Much of the controversy will now be ended as a result of recent scientific research (Pejic and co-workers, 2000). Here we review the research and written documentation about Plavac mali, Zinfandel and Primitivo and their relationships and we present the results of recent research.
  • Publication Date: Apr 2000
  • Journal: Agriculturae Conspectus Scientificus